All Stories

  1. Message or messenger, that's the right question

    Article • Microbes Infection and Chemotherapy, November 2023, Universidad Nacional Hermilio Valdizan

    Dr Joaquim Ruiz

  2. Super-infection by multiple microorganisms in COVID-19 patients

    Article • Frontiers in Molecular Biosciences, March 2023, Frontiers

    Dr Joaquim Ruiz

  3. Class 1 and 2 Integrons in Escherichia coli Strains Isolated from Diarrhea and Bacteremia in Children Less Than 2 Years of Age from Peru

    Article • American Journal of Tropical Medicine and Hygiene, January 2023, American Society of Tropical Medicine and Hygiene

    Dr Joaquim Ruiz

  4. First report of CrpP prevalence in a South American country

    Article • New Microbes and New Infections, January 2023, Elsevier

    Dr Joaquim Ruiz

  5. Phenotypic Characteristics and Clonal Relationships of Stenotrophomonas maltophilia Isolates in Hospitalized Adults from a Private Center in Lima, Peru

    Article • Infection and Chemotherapy, January 2023, XMLink

    Dr Joaquim Ruiz

  6. JMM Profile: Bartonella bacilliformis: a forgotten killer

    Article • Journal of Medical Microbiology, December 2022, Society for General Microbiology

    Dr Joaquim Ruiz

  7. High rates of extensively drug-resistant Acinetobacter baumannii in a Peruvian hospital 2013–2019

    Article • Tropical Doctor, December 2022, SAGE Publications

    Dr Joaquim Ruiz

  8. KPC-2-NDM-1-producing Serratia marcescens: first description in Peru

    Article • New Microbes and New Infections, November 2022, Elsevier

    Dr Joaquim Ruiz

  9. Evolution of the prevalence and antimicrobial resistance among Escherichia coli isolated as a cause of infection in patients admitted to a iv-level hospital in Lima, Peru

    Article • Revista de Patologia Tropical / Journal of Tropical Pathology, October 2022, Programa de Pos-Graduacao Projeto e Cidade, Universidade Federal de Goias

    Dr Joaquim Ruiz

  10. Antibiotic susceptibility among non-clinical Escherichia coli as a marker of antibiotic pressure in Peru (2009–2019): one health approach

    Article • Heliyon, September 2022, Elsevier

    Dr Joaquim Ruiz

  11. Recurrence of Urinary Tract Infections due to Escherichia coli and Its Association with Antimicrobial Resistance

    Article • Microbial Drug Resistance, February 2022, Mary Ann Liebert Inc

    Dr Joaquim Ruiz

  12. COVID-19: chronicle of a pandemic foretold

    Article • Microbes Infection and Chemotherapy, January 2022, Universidad Nacional Hermilio Valdizan

    Dr Joaquim Ruiz

  13. Worrying levels of antimicrobial resistance in Gram-negative bacteria isolated from cell phones and uniforms of Peruvian intensive care unit workers

    Article • Transactions of the Royal Society of Tropical Medicine and Hygiene, January 2022, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  14. High Prevalence of blaCTX-M in Fecal Commensal Escherichia coli from Healthy Children

    Article • Infection and Chemotherapy, January 2022, Korean Society of Infectious Diseases and Korean Society for Chemotherapy (KAMJE)

    Dr Joaquim Ruiz

  15. Retrospective analysis of the emergence of antibiotic-resistant Salmonella enterica infections in a level IV hospital from Lima, Peru

    Article • Tropical Doctor, December 2021, SAGE Publications

    Dr Joaquim Ruiz

  16. Antimicrobial Resistance, from bench-to-publicside

    Article • Microbes Infection and Chemotherapy, August 2021, Universidad Nacional Hermilio Valdizan

    Dr Joaquim Ruiz

  17. Immunogenic Peptides from Pap31 and SCS-α of Bartonella bacilliformis: One Step Closer to a Rapid Diagnostic Tool for Carrion’s Disease

    Article • Pathogens, July 2021, MDPI AG

    Dr Joaquim Ruiz

  18. Molecular Characterization of Fluoroquinolone-Resistant Bartonella bacilliformis

    Article • Pathogens, July 2021, MDPI AG

    Dr Joaquim Ruiz

  19. Type 3 secretion system as an anti-Pseudomonal target

    Article • Microbial Pathogenesis, June 2021, Elsevier

    Dr Joaquim Ruiz

  20. Type 3 secretion system of Pseudomonas aeruginosa

    Article • Microbiological Research, May 2021, Elsevier

    Dr Joaquim Ruiz

  21. Caracterización de Escherichia coli D7111 productora de β-lactamasa TEM-176

    Article • Revista Peruana de Medicina Experimental y Salud Pública, March 2021, Instituto Nacional de Salud (Peru)

    Dr Joaquim Ruiz

  22. Frecuencia de genes que codifican proteínas autotransportadoras serinproteasa de Enterobacteriaceae (SPATE) en cepas de Escherichia coli difusamente adherente (DAEC) provenientes de niños con y sin diarrea

    Article • Revista Peruana de Medicina Experimental y Salud Pública, March 2021, Instituto Nacional de Salud (Peru)

    Dr Joaquim Ruiz

  23. Evolution of Antimicrobial Resistance Levels of ESKAPE Microorganisms in a Peruvian IV-Level Hospital

    Article • Infection and Chemotherapy, January 2021, Korean Society of Infectious Diseases and Korean Society for Chemotherapy (KAMJE)

    Dr Joaquim Ruiz

  24. Enhanced antibiotic resistance as a collateral COVID-19 pandemic effect?

    Article • Journal of Hospital Infection, January 2021, Elsevier

    Dr Joaquim Ruiz

  25. Research inequities: avoiding the next pandemic

    Article • Pathogens and Global Health, August 2020, Taylor & Francis

    Dr Joaquim Ruiz

  26. Escherichia coli ST131 clones harbouring AggR and AAF/V fimbriae causing bacteremia in Mozambican children: Emergence of new variant of fimH27 subclone

    Article • PLoS Neglected Tropical Diseases, May 2020, PLOS

    Dr Joaquim Ruiz

  27. Resistencia a nitrofuranos mediada por mutaciones en los genes cnr y snrA en Salmonella enterica procedentes de muestras cárnicas para consumo humano

    Article • Revista Peruana de Medicina Experimental y Salud Pública, March 2020, Instituto Nacional de Salud (Peru)

    Dr Joaquim Ruiz

  28. Article • January 2020, Universidad Cientifica del Sur

    Dr Joaquim Ruiz

  29. Transferable Mechanisms of Quinolone Resistance from 1998 Onward

    Article • Clinical Microbiology Reviews, September 2019, ASM Journals

    Dr Joaquim Ruiz

  30. High frequency of the exoU+/exoS+ genotype associated with multidrug-resistant “high-risk clones” of Pseudomonas aeruginosa clinical isolates from Peruvian hospitals

    Article • Scientific Reports, July 2019, Springer Science + Business Media

    Dr Joaquim Ruiz

  31. CrpP, a passenger or a hidden stowaway in the Pseudomonas aeruginosa genome?

    Article • Journal of Antimicrobial Chemotherapy, July 2019, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  32. Presence of Extended-Spectrum β-lactamase, CTX-M-65 in Salmonella enterica serovar Infantis Isolated from Children with Diarrhea in Lima, Peru

    Article • Journal of Pediatric Infectious Diseases, April 2019, Thieme Publishing Group

    Dr Joaquim Ruiz

  33. Azithromycin resistance levels and mechanisms in Escherichia coli

    Article • Scientific Reports, April 2019, Springer Science + Business Media

    Dr Joaquim Ruiz

  34. Reflexión acerca del concepto de “Una salud”

    Article • Revista Peruana de Medicina Experimental y Salud Pública, December 2018, Instituto Nacional de Salud (Peru)

    Dr Joaquim Ruiz

  35. Specific type IV pili groups in clinical isolates of Pseudomonas aeruginosa

    Article • International Microbiology, November 2018, Springer Science + Business Media

    Dr Joaquim Ruiz

  36. Interplay between MexAB-OprM and MexEF-OprN in clinical isolates of Pseudomonas aeruginosa

    Article • Scientific Reports, November 2018, Springer Science + Business Media

    Dr Joaquim Ruiz

  37. Bartonella quintana , past, present, and future of the scourge of World War I

    Article • Apmis, October 2018, Wiley

    Dr Joaquim Ruiz

  38. Revisiting Bartonella bacilliformis MLST

    Article • Infection Genetics and Evolution, September 2018, Elsevier

    Dr Joaquim Ruiz

  39. Epidemiology and molecular characterization of multidrug-resistant Escherichia coli isolates harboring blaCTX-M group 1 extended-spectrum β-lactamases causing bacteremia and urinary tract infection in Manhiça, M...

    Article • Infection and Drug Resistance, July 2018, Dove Medical Press

    Dr Joaquim Ruiz, Dr Sara Maria/M Soto, Delfino Vubil, Maria Pons

  40. Differences in tetracycline resistance determinant carriage among Shigella flexneri and Shigella sonnei are not related to different plasmid Inc-type carriage

    Article • Journal of Global Antimicrobial Resistance, June 2018, Elsevier

    Dr Joaquim Ruiz

  41. Analysis of the presence of erroneous Qnr sequences in GenBank

    Article • Journal of Antimicrobial Chemotherapy, February 2018, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  42. Salmonella enterica serovars Typhimurium and Enteritidis causing mixed infections in febrile children in Mozambique

    Article • Infection and Drug Resistance, January 2018, Dove Medical Press

    Dr Joaquim Ruiz

  43. Resistance to quinolones, cephalosporins and macrolides in Escherichia coli causing bacteraemia in Peruvian children

    Article • Journal of Global Antimicrobial Resistance, December 2017, Elsevier

    Dr Joaquim Ruiz

  44. Carrion's Disease: the Sound of Silence

    Article • Clinical Microbiology Reviews, November 2017, ASM Journals

    Dr Joaquim Ruiz

  45. Molecular and Phenotypic Characterization of Diarrheagenic Escherichia coli Strains Isolated from Bacteremic Children

    Article • American Journal of Tropical Medicine and Hygiene, November 2017, American Society of Tropical Medicine and Hygiene

    Dr Joaquim Ruiz

  46. Immunosuppressive and angiogenic cytokine profile associated with Bartonella bacilliformis infection in post-outbreak and endemic areas of Carrion's disease in Peru

    Article • PLoS Neglected Tropical Diseases, June 2017, PLOS

    Dr Joaquim Ruiz

  47. Characterisation of the first KPC-2-producing Klebsiella pneumoniae ST340 from Peru

    Article • Journal of Global Antimicrobial Resistance, June 2017, Elsevier

    Dr Joaquim Ruiz

  48. Virulence and Antimicrobial Resistance inCampylobacterspp. from a Peruvian Pediatric Cohort

    Article • Scientifica, January 2017, Hindawi Publishing Corporation

    Dr Joaquim Ruiz, Theresa Ochoa

  49. Antimicrobial resistance levels among diarrhoeagenic micro-organisms recovered from children under-5 with acute moderate-to-severe diarrhoea in Rabat, Morocco

    Article • Journal of Global Antimicrobial Resistance, December 2016, Elsevier

    Dr Joaquim Ruiz

  50. Carrion’s disease: an eradicable illness?

    Article • Infectious Diseases of Poverty, December 2016, Springer Science + Business Media

    Dr Joaquim Ruiz

  51. Macrolide resistance mechanisms inEnterobacteriaceae: Focus on azithromycin

    Article • Critical Reviews in Microbiology, October 2016, Taylor & Francis

    Dr Joaquim Ruiz

  52. Carrion’s Disease: More Than a Sand Fly–Vectored Illness

    Article • PLoS Pathogens, October 2016, PLOS

    Dr Joaquim Ruiz

  53. Development and characterisation of highly antibiotic resistant Bartonella bacilliformis mutants

    Article • Scientific Reports, September 2016, Springer Science + Business Media

    Dr Joaquim Ruiz

  54. Succinyl-CoA Synthetase: New Antigen Candidate of Bartonella bacilliformis

    Article • PLoS Neglected Tropical Diseases, September 2016, PLOS

    Dr Joaquim Ruiz

  55. Virulence factors profiles and ESBL production in Escherichia coli causing bacteremia in Peruvian children

    Article • Diagnostic Microbiology and Infectious Disease, September 2016, Elsevier

    Dr Joaquim Ruiz

  56. Whole-Genome Sequencing of Two Bartonella bacilliformis Strains

    Article • Genome Announcements, August 2016, ASM Journals

    Dr Joaquim Ruiz

  57. picgene of enteroaggregativeEscherichia coliand its association with diarrhea in Peruvian children

    Article • Pathogens and Disease, June 2016, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  58. Pathogenicity Island O-122 in enteropathogenic Escherichia coli strains is associated with diarrhea severity in children from Lima Peru

    Article • International Journal of Medical Microbiology, June 2016, Elsevier

    Dr Joaquim Ruiz

  59. Prevalencia de compra sin receta y recomendación de antibióticos para niños menores de 5 años en farmacias privadas de zonas periurbanas en Lima, Perú

    Article • Revista Peruana de Medicina Experimental y Salud Pública, May 2016, Instituto Nacional de Salud (Peru)

    Dr Joaquim Ruiz

  60. Evaluation of PCR Approaches for Detection of Bartonella bacilliformis in Blood Samples

    Article • PLoS Neglected Tropical Diseases, March 2016, PLOS

    Dr Joaquim Ruiz

  61. Multi-Locus Sequence Typing of Bartonella bacilliformis DNA Performed Directly from Blood of Patients with Oroya’s Fever During a Peruvian Outbreak

    Article • PLoS Neglected Tropical Diseases, January 2016, PLOS

    Dr Joaquim Ruiz

  62. Bordetella pertussis diagnosis in children under five years of age in the Regional Hospital of Cajamarca, Northern Peru

    Article • The Journal of Infection in Developing Countries, November 2015, Journal of Infection in Developing Countries

    Dr Joaquim Ruiz

  63. InvasiveSalmonellaInfections Among Children From Rural Mozambique, 2001–2014

    Article • Clinical Infectious Diseases, October 2015, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  64. Antibiotic resistance in Bartonella bacilliformis clinical isolates from an endemic area of Peru

    Article • Journal of Global Antimicrobial Resistance, September 2015, Elsevier

    Dr Juana Mercedes del Valle Mendoza, Dr Joaquim Ruiz

  65. Proteins of Bartonella bacilliformis: Candidates for Vaccine Development

    Article • International Journal of Peptides, August 2015, Hindawi Publishing Corporation

    Dr Joaquim Ruiz

  66. Comparative analysis of antimicrobial resistance in enterotoxigenicEscherichia coliisolates from two paediatric cohort studies in Lima, Peru

    Article • Transactions of the Royal Society of Tropical Medicine and Hygiene, July 2015, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  67. A comparison of human metapneumovirus and respiratory syncytial virus WHO-defined severe pneumonia in Moroccan children

    Article • Epidemiology and Infection, July 2015, Cambridge University Press

    Dr Quique Bassat, Dr Joaquim Ruiz

  68. Characterization of two Achromobacter xylosoxidans isolates from patients with pertussis-like symptoms

    Article • Asian Pacific Journal of Tropical Medicine, June 2015, Elsevier

    Dr Juana Mercedes del Valle Mendoza, Dr Joaquim Ruiz

  69. Virulence factors and mechanisms of antimicrobial resistance in Shigella strains from periurban areas of Lima (Peru)

    Article • International Journal of Medical Microbiology, June 2015, Elsevier

    Dr Joaquim Ruiz

  70. Development and analysis of furazolidone‐resistant Escherichia coli mutants

    Article • Apmis, May 2015, Wiley

    Dr Joaquim Ruiz

  71. An unidentified cluster of infection in the Peruvian Amazon region

    Article • The Journal of Infection in Developing Countries, May 2015, Journal of Infection in Developing Countries

    Dr Juana Mercedes del Valle Mendoza, Dr Joaquim Ruiz

  72. Diarrheal Disease in Rural Mozambique: Burden, Risk Factors and Etiology of Diarrheal Disease among Children Aged 0–59 Months Seeking Care at Health Facilities

    Article • PLoS ONE, May 2015, PLOS

    Dr Quique Bassat, Dr Joaquim Ruiz

  73. Characterisation of extended-spectrum β-lactamases among Klebsiella pneumoniae isolates causing bacteraemia and urinary tract infection in Mozambique

    Article • Journal of Global Antimicrobial Resistance, March 2015, Elsevier

    Dr Joaquim Ruiz

  74. Possible Vertical Transmission of Bartonella bacilliformis in Peru

    Article • American Journal of Tropical Medicine and Hygiene, January 2015, American Society of Tropical Medicine and Hygiene

    Dr Joaquim Ruiz

  75. Aetiology, epidemiology and clinical characteristics of acute moderate-to-severe diarrhoea in children under 5 years of age hospitalized in a referral paediatric hospital in Rabat, Morocco

    Article • Journal of Medical Microbiology, January 2015, Society for General Microbiology

    Dr Joaquim Ruiz

  76. DiarrheagenicEscherichia coliPhylogroups Are Associated with Antibiotic Resistance and Duration of Diarrheal Episode

    Article • The Scientific World JOURNAL, January 2015, Hindawi Publishing Corporation

    Dr Joaquim Ruiz

  77. Risk factors for a poor outcome among children admitted with clinically severe pneumonia to a university hospital in Rabat, Morocco

    Article • International Journal of Infectious Diseases, November 2014, Elsevier

    Dr Joaquim Ruiz, Dr Quique Bassat

  78. Feeding of Young Children During Diarrhea: Caregivers' Intended Practices and Perceptions

    Article • American Journal of Tropical Medicine and Hygiene, September 2014, American Society of Tropical Medicine and Hygiene

    Dr Joaquim Ruiz

  79. Identification of human papillomavirus as a preventive strategy for cervical cancer in asymptomatic women in the Peruvian Andes

    Article • Asian Pacific Journal of Tropical Medicine, September 2014, Medknow

    Dr Joaquim Ruiz, Dr Juana Mercedes del Valle Mendoza

  80. Diarrhoea caused by rotavirus in a regional Peruvian hospital: determination of circulating genotypes

    Article • Transactions of the Royal Society of Tropical Medicine and Hygiene, April 2014, Oxford University Press (OUP)

    Dr Juana Mercedes del Valle Mendoza, Dr Joaquim Ruiz

  81. Diagnosis of Carrion’s Disease by Direct Blood PCR in Thin Blood Smear Negative Samples

    Article • PLoS ONE, March 2014, PLOS

    Dr Joaquim Ruiz, Dr Juana Mercedes del Valle Mendoza

  82. The Epidemiology and Aetiology of Infections in Children Admitted with Clinical Severe Pneumonia to a University Hospital in Rabat, Morocco

    Article • Journal of Tropical Pediatrics, February 2014, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  83. Development of a 16S rRNA PCR-RFLP Assay for Bartonella identification: Applicability in the Identification of Species Involved in Human Infections

    Article • Universal Journal of Microbiology Research, January 2014, Horizon Research Publishing Co., Ltd.

    Dr Joaquim Ruiz

  84. Analysis of quinolone-resistance in commensal and diarrheagenic Escherichia coli isolates from infants in Lima, Peru

    Article • Transactions of the Royal Society of Tropical Medicine and Hygiene, December 2013, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  85. Prevention of travellers' diarrhoea: where and who?

    Article • The Lancet Infectious Diseases, November 2013, Elsevier

    Dr Joaquim Ruiz

  86. Detection of Secretory Immunoglobulin A in Human Colostrum as Mucosal Immune Response Against Proteins of the Type III Secretion System of Salmonella, Shigella and Enteropathogenic Escherichia Coli

    Article • The Pediatric Infectious Disease Journal, October 2013, Wolters Kluwer Health

    Dr Joaquim Ruiz

  87. Which mechanisms of azithromycin resistance are selected when efflux pumps are inhibited?

    Article • International Journal of Antimicrobial Agents, October 2013, Elsevier

    Dr Joaquim Ruiz

  88. Antibiotic Usage Prior and During Hospitalization for Clinical Severe Pneumonia in Children under Five Years of Age in Rabat, Morocco

    Article • Antibiotics, September 2013, MDPI AG

    Dr Joaquim Ruiz, Dr Quique Bassat

  89. Antimicrobial resistance in Shigella spp. causing traveller's diarrhoea (1995–2010): A retrospective analysis

    Article • Travel Medicine and Infectious Disease, September 2013, Elsevier

    Dr Joaquim Ruiz

  90. Relevant role of efflux pumps in high levels of rifaximin resistance in Escherichia coli clinical isolates

    Article • Transactions of the Royal Society of Tropical Medicine and Hygiene, July 2013, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  91. Multiplex Real-Time PCR for Detection of Campylobacter, Salmonella, and Shigella

    Article • Journal of Clinical Microbiology, June 2013, ASM Journals

    Theresa Ochoa, Dr Joaquim Ruiz

  92. Factors Affecting Caregivers’ Use of Antibiotics Available Without a Prescription in Peru

    Article • PEDIATRICS, June 2013, American Academy of Pediatrics (AAP)

    Dr Joaquim Ruiz

  93. In Vitro Development and Analysis of Escherichia coli and Shigella boydii Azithromycin–Resistant Mutants

    Article • Microbial Drug Resistance, April 2013, Mary Ann Liebert Inc

    Dr Joaquim Ruiz

  94. QnrVC, a new transferable Qnr-like family

    Article • Enfermedades Infecciosas y Microbiología Clínica, March 2013, Elsevier

    Dr Joaquim Ruiz

  95. β-Lactamases, transferable quinolone resistance determinants, and class 1 integron-mediated antimicrobial resistance in human clinical Salmonella enterica isolates of non-Typhimurium serotypes

    Article • International Journal of Medical Microbiology, January 2013, Elsevier

    Dr Joaquim Ruiz

  96. Genotypic Characterization of Enterotoxigenic Escherichia coli Strains Causing Traveler's Diarrhea

    Article • Journal of Clinical Microbiology, December 2012, ASM Journals

    Dr Joaquim Ruiz

  97. Molecular mechanisms of antibiotic resistance in diarrhoeagenic Escherichia coli isolated from children

    Article • International Journal of Antimicrobial Agents, December 2012, Elsevier

    Dr Joaquim Ruiz

  98. Transferable mechanisms of quinolone resistance

    Article • International Journal of Antimicrobial Agents, September 2012, Elsevier

    Dr Joaquim Ruiz

  99. Fitness and Molecular Mechanisms of Resistance to Rifaximin in In Vitro Selected Escherichia coli Mutants

    Article • Microbial Drug Resistance, August 2012, Mary Ann Liebert Inc

    Dr Joaquim Ruiz, Dr Joaquim Gascon

  100. Genetic diversity of locus of enterocyte effacement genes of enteropathogenic Escherichia coli isolated from Peruvian children

    Article • Journal of Medical Microbiology, August 2012, Society for General Microbiology

    Dr Joaquim Ruiz

  101. Intrahospitalary dissemination of Klebsiella pneumoniae carrying blaDHA-1 and qnrB4 genes within a novel complex class 1 integron

    Article • Diagnostic Microbiology and Infectious Disease, June 2012, Elsevier

    Dr Joaquim Ruiz

  102. Plasmid-mediated quinolone resistance genes in enteroaggregative Escherichia coli from infants in Lima, Peru

    Article • International Journal of Antimicrobial Agents, June 2012, Elsevier

    Dr Joaquim Ruiz

  103. Effect of bovine lactoferrin on the minimum inhibitory concentrations of ampicillin and trimethoprim–sulfamethoxazole for clinical Shigella spp. strains1This article is part of a Special Issue entitled Lactoferrin and has undergone th...

    Article • Biochemistry and Cell Biology, June 2012, Canadian Science Publishing

    Dr Joaquim Ruiz

  104. Use of Commercially Available Oral Rehydration Solutions in Lima, Peru

    Article • American Journal of Tropical Medicine and Hygiene, June 2012, American Society of Tropical Medicine and Hygiene

    Dr Joaquim Ruiz

  105. Niveles de resistencia a quinolonas y otros antimicrobianos en cepas de Escherichia coli comensales en niños de la zona periurbana de Lima, Perú

    Article • Revista Peruana de Medicina Experimental y Salud Pública, March 2012, FapUNIFESP (SciELO)

    Dr Joaquim Ruiz

  106. Short communication: Detection of Shiga toxin-producing Escherichia coli (STEC) in healthy cattle and pigs in Lima, Peru

    Article • Journal of Dairy Science, March 2012, American Dairy Science Association

    Dr Joaquim Ruiz

  107. Norovirus prevalence in ‘pathogen negative’ gastroenteritis in children from periurban areas in Lima, Peru

    Article • Transactions of the Royal Society of Tropical Medicine and Hygiene, December 2011, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  108. Quantitative Real-time Polymerase Chain Reaction for Enteropathogenic Escherichia coli: A Tool for Investigation of Asymptomatic Versus Symptomatic Infections

    Article • Clinical Infectious Diseases, October 2011, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  109. Molecular Surveillance of Circulating Dengue Genotypes Through European Travelers

    Article • Journal of Travel Medicine, May 2011, Oxford University Press (OUP)

    Dr Joaquim Ruiz, Dr Joaquim Gascon

  110. Molecular epidemiology and resistance mechanisms involved in reduced susceptibility to amoxicillin/clavulanic acid in Klebsiella pneumoniae isolates from a chronic care centre

    Article • International Journal of Antimicrobial Agents, May 2011, Elsevier

    Dr Joaquim Ruiz

  111. Phylogenetic relationships of Shiga toxin-producing Escherichia coli isolated from Peruvian children

    Article • Journal of Medical Microbiology, May 2011, Society for General Microbiology

    Dr Joaquim Ruiz

  112. Frecuencia y patotipos de Escherichia coli diarrogénicas en niños peruanos con y sin diarrea

    Article • Revista Peruana de Medicina Experimental y Salud Pública, March 2011, FapUNIFESP (SciELO)

    Dr Joaquim Ruiz

  113. Antimicrobial Drug Resistance Trends of Bacteremia Isolates in a Rural Hospital in Southern Mozambique

    Article • American Journal of Tropical Medicine and Hygiene, July 2010, American Society of Tropical Medicine and Hygiene

    Dr Joaquim Ruiz

  114. Bartonella bacilliformis, endemic pathogen of the Andean region, is intrinsically resistant to quinolones

    Article • International Journal of Infectious Diseases, June 2010, Elsevier

    Dr Joaquim Ruiz

  115. Genetic analysis by pulsed-field gel electrophoresis of Enteropathogenic Escherichia coli (EPEC) strains isolated from Peruvian children

    Article • International Journal of Infectious Diseases, March 2010, Elsevier

    Dr Joaquim Ruiz

  116. Role of Efflux pumps in the development of quinolone-resistance in Peruvian Escherichia coli isolates

    Article • International Journal of Infectious Diseases, March 2010, Elsevier

    Dr Joaquim Ruiz

  117. Characterization of the enzyme aac(3)-id in a clinical isolate of Salmonella enterica serovar Haifa causing traveler's diarrhea

    Article • Enfermedades Infecciosas y Microbiología Clínica, October 2009, Elsevier

    Dr Joaquim Ruiz, Dr Joaquim Gascon, Dr Pilar Goñi

  118. Multidrug resistance related to class 1 integrons in human Salmonella enterica serotype Typhimurium isolates and emergence of atypical sul3-associated integrons

    Article • International Journal of Antimicrobial Agents, October 2009, Elsevier

    Dr Joaquim Ruiz

  119. Invasive non-typhoidal Salmonella in Mozambican children

    Article • Tropical Medicine & International Health, September 2009, Wiley

    Dr Joaquim Ruiz

  120. Molecular and serologic markers of acute dengue infection in naive and flavivirus-vaccinated travelers

    Article • Diagnostic Microbiology and Infectious Disease, September 2009, Elsevier

    Dr Joaquim Ruiz, Dr Joaquim Gascon

  121. Evolution of antimicrobial resistance in enteroaggregative Escherichia coli and enterotoxigenic Escherichia coli causing traveller's diarrhoea

    Article • Journal of Antimicrobial Chemotherapy, May 2009, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  122. Antimicrobial Susceptibility and Mechanisms of Resistance in Shigella and Salmonella Isolates from Children under Five Years of Age with Diarrhea in Rural Mozambique

    Article • Antimicrobial Agents and Chemotherapy, March 2009, ASM Journals

    Dr Joaquim Ruiz

  123. Estudio clinicoepidemiológico del dengue importado en España

    Article • Medicina Clínica, June 2008, Elsevier

    Dr Joaquim Ruiz, Dr Joaquim Gascon

  124. Development of Escherichia coli rifaximin-resistant mutants: frequency of selection and stability

    Article • Journal of Antimicrobial Chemotherapy, March 2008, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  125. Quinolone resistance among Shigella spp. isolated from travellers returning from India

    Article • Clinical Microbiology and Infection, March 2008, Elsevier

    Dr Joaquim Ruiz

  126. In vitro antimicrobial activity of rifaximin against enteropathogens causing traveler's diarrhea

    Article • Diagnostic Microbiology and Infectious Disease, December 2007, Elsevier

    Dr Joaquim Ruiz, Dr Joaquim Gascon

  127. Molecular typing of Staphylococcus aureus clinical isolates by pulsed-field gel electrophoresis, staphylococcal cassette chromosome mec type determination and dissemination of antibiotic resistance genes

    Article • International Journal of Antimicrobial Agents, December 2007, Elsevier

    Dr Joaquim Ruiz, Dr Pilar Goñi

  128. Epidemiology and Clinical Presentation of Shigellosis in Children Less Than Five Years of Age in Rural Mozambique

    Article • The Pediatric Infectious Disease Journal, November 2007, Wolters Kluwer Health

    Dr Joaquim Ruiz, Dr Joaquim Gascon

  129. Antimicrobial resistance of Vibrio cholerae O1 serotype Ogawa isolated in Manhiça District Hospital, southern Mozambique

    Article • Journal of Antimicrobial Chemotherapy, July 2007, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  130. Salmonella ovarian abscess following travel diarrhoea episode

    Article • Archives of Gynecology and Obstetrics, May 2007, Springer Science + Business Media

    Dr Joaquim Ruiz, Dr Joaquim Gascon

  131. Resistance to quinolones in Salmonella infantis due to overexpression of an active efflux system and a mutation in the gyrA gene

    Article • Enfermedades Infecciosas y Microbiología Clínica, May 2007, Elsevier

    Dr Joaquim Ruiz

  132. Trends in antimicrobial resistance in Campylobacter spp. causing traveler's diarrhea

    Article • Apmis, March 2007, Wiley

    Dr Joaquim Ruiz, Dr Joaquim Gascon

  133. Molecular Epidemiology of Macrolide and Tetracycline Resistances in Commensal Gemella sp. Isolates

    Article • Antimicrobial Agents and Chemotherapy, February 2007, ASM Journals

    Dr Joaquim Ruiz

  134. Class 1 Integrons in Salmonella Strains Causing Traveler's Diarrhea

    Article • Antimicrobial Agents and Chemotherapy, April 2006, ASM Journals

    Dr Joaquim Ruiz

  135. Outbreak of Infection WithAcinetobacterStrain RUH 1139 in an Intensive Care Unit

    Article • Infection Control and Hospital Epidemiology, April 2006, Cambridge University Press

    Dr Joaquim Ruiz, MD, PhD María Araque

  136. Evidence for a reserpine‐affected mechanism of resistance to tetracycline in Neisseria gonorrhoeae

    Article • Apmis, October 2005, Wiley

    Dr Joaquim Ruiz

  137. Ciprofloxacin, Salicylate, and 2,4-Dinitrophenol Decrease Production of AmpC-Type β-Lactamase in Two Citrobacter freundii Clinical Isolates

    Article • Microbial Drug Resistance, September 2005, Mary Ann Liebert Inc

    Dr Joaquim Ruiz

  138. Validación de la técnica de PCR para la detección de Escherichia coli enteroagregativa causante de diarrea del viajero

    Article • Enfermedades Infecciosas y Microbiología Clínica, August 2005, Elsevier

    Dr Joaquim Ruiz, Dr Joaquim Gascon

  139. A double mutation in the gyrA gene is necessary to produce high levels of resistance to moxifloxacin in Campylobacter spp. clinical isolates

    Article • International Journal of Antimicrobial Agents, June 2005, Elsevier

    Dr Joaquim Ruiz

  140. Prevalence of Pathogenicity Island IICFT073 Genes among Extraintestinal Clinical Isolates of Escherichia coli

    Article • Journal of Clinical Microbiology, May 2005, ASM Journals

    Dr Joaquim Ruiz

  141. Isolation of an amikacin-resistant Escherichia coli strain after tobramycin treatment of previous recurrent episodes of respiratory tract infections caused by Pseudomonas aeruginosa

    Article • Clinical Microbiology and Infection, January 2005, Elsevier

    Dr Joaquim Ruiz

  142. Mechanism of Resistance to Several Antimicrobial Agents in Salmonella Clinical Isolates Causing Traveler's Diarrhea

    Article • Antimicrobial Agents and Chemotherapy, October 2004, ASM Journals

    Dr Joaquim Ruiz

  143. Mechanisms of Resistance in Multiple-Antibiotic-Resistant Escherichia coli Strains of Human, Animal, and Food Origins

    Article • Antimicrobial Agents and Chemotherapy, October 2004, ASM Journals

    Dr Joaquim Ruiz

  144. Characterization of the molecular mechanisms of quinolone resistance in Yersinia enterocolitica O:3 clinical isolates

    Article • Journal of Antimicrobial Chemotherapy, April 2004, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  145. Mecanismos de resistencia a betalactámicos y ácido nalidíxico en aislados clínicos de Salmonella enterica serotipo hadar y bsilla

    Article • Enfermedades Infecciosas y Microbiología Clínica, April 2004, Elsevier

    Dr Joaquim Ruiz

  146. Antibiotic resistance and epidemiological typing of Staphylococcus aureus strains from ovine and rabbit mastitis

    Article • International Journal of Antimicrobial Agents, March 2004, Elsevier

    Dr Joaquim Ruiz

  147. Molecular characterization of the integrons in S higella strains isolated from patients with traveler's diarrhea

    Article • Diagnostic Microbiology and Infectious Disease, March 2004, Elsevier

    Dr Joaquim Ruiz

  148. Effect of the efflux pump inhibitor Phe-Arg- -naphthylamide on the MIC values of the quinolones, tetracycline and chloramphenicol, in Escherichia coli isolates of different origin

    Article • Journal of Antimicrobial Chemotherapy, February 2004, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  149. Mecanismos de resistencia a betalactámicos y ácido nalidíxico en aislados clínicos de Salmonella enterica serotipo hadar y bsilla

    Article • Enfermedades Infecciosas y Microbiología Clínica, January 2004, Elsevier

    Dr Joaquim Ruiz

  150. In vitro fluoroquinolone-resistant mutants of Salmonella enterica serotype Enteritidis: analysis of mechanisms involved in resistance

    Article • International Journal of Antimicrobial Agents, November 2003, Elsevier

    Dr Joaquim Ruiz

  151. Blood Cultures for Women with Uncomplicated Acute Pyelonephritis: Are They Necessary?

    Article • Clinical Infectious Diseases, October 2003, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  152. Dispersión intercontinental de una cepa de Shigella flexneri resistente a trimetoprima

    Article • Enfermedades Infecciosas y Microbiología Clínica, October 2003, Elsevier

    Dr Joaquim Ruiz

  153. Integron-mediated antibiotic multiresistance in Acinetobacter baumannii clinical isolates from Spain

    Article • Clinical Microbiology and Infection, September 2003, Elsevier

    Dr Joaquim Ruiz

  154. Partial characterization of a transposon containing the tet(A) determinant in a clinical isolate of Acinetobacter baumannii

    Article • Journal of Antimicrobial Chemotherapy, August 2003, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  155. Detection of dihydrofolate reductase genes by PCR and RFLP

    Article • Diagnostic Microbiology and Infectious Disease, August 2003, Elsevier

    Dr Joaquim Ruiz

  156. Presence of the Tet M Determinant in a Clinical Isolate of Acinetobacter baumannii

    Article • Antimicrobial Agents and Chemotherapy, July 2003, ASM Journals

    Dr Joaquim Ruiz

  157. In vitro activity of gemifloxacin against clinical isolates of Neisseria gonorrhoeae with and without mutations in the gyrA gene

    Article • International Journal of Antimicrobial Agents, July 2003, Elsevier

    Dr Joaquim Ruiz

  158. Analysis of the clonal relationship among clinical isolates of Salmonella enterica serovar Infantis by different typing methods

    Article • Revista do Instituto de Medicina Tropical de São Paulo, June 2003, FapUNIFESP (SciELO)

    Dr Joaquim Ruiz

  159. Mechanisms of resistance to quinolones: target alterations, decreased accumulation and DNA gyrase protection

    Article • Journal of Antimicrobial Chemotherapy, April 2003, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  160. Clonal Dissemination of Yersinia enterocolitica Strains with Various Susceptibilities to Nalidixic Acid

    Article • Journal of Clinical Microbiology, April 2003, ASM Journals

    Dr Joaquim Ruiz

  161. Dispersión intercontinental de una cepa de Shigella flexneri resistente a trimetoprima

    Article • Enfermedades Infecciosas y Microbiología Clínica, January 2003, Elsevier

    Dr Joaquim Ruiz

  162. Differences in Virulence Factors among Clinical Isolates of Escherichia coli Causing Cystitis and Pyelonephritis in Women and Prostatitis in Men

    Article • Journal of Clinical Microbiology, December 2002, ASM Journals

    Dr Joaquim Ruiz

  163. Characterization of an Integron Carrying a New Class D β -Lactamase (OXA-37) in Acinetobacter baumannii

    Article • Microbial Drug Resistance, December 2002, Mary Ann Liebert Inc

    Dr Joaquim Ruiz

  164. Mutations in gyrA and parC QRDRs Are Not Relevant for Quinolone Resistance in Epidemiological Unrelated Stenotrophomonas maltophilia Clinical Isolates

    Article • Microbial Drug Resistance, December 2002, Mary Ann Liebert Inc

    Dr Joaquim Ruiz

  165. Correlation between the activity of different fluoroquinolones and the presence of mechanisms of quinolone resistance in epidemiologically related and unrelated strains of methicillin-susceptible and -resistant Staphylococcus aureus

    Article • Clinical Microbiology and Infection, December 2002, Elsevier

    Dr Joaquim Ruiz

  166. Are Quinolone‐Resistant UropathogenicEscherichia coliLess Virulent?

    Article • The Journal of Infectious Diseases, October 2002, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  167. Distribution of beta-lactamases in Acinetobacter baumannii clinical isolates and the effect of Syn 2190 (AmpC inhibitor) on the MICs of different beta-lactam antibiotics

    Article • Journal of Antimicrobial Chemotherapy, August 2002, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  168. Prevalence of the sat Gene among Clinical Isolates of Shigella spp. Causing Travelers' Diarrhea: Geographical and Specific Differences

    Article • Journal of Clinical Microbiology, April 2002, ASM Journals

    Dr Joaquim Ruiz

  169. High prevalence of nalidixic acid resistant, ciprofloxacin susceptible phenotype among clinical isolates of Escherichia coli and other Enterobacteriaceae

    Article • Diagnostic Microbiology and Infectious Disease, April 2002, Elsevier

    Dr Joaquim Ruiz

  170. Effect of an efflux pump inhibitor on the MIC of nalidixic acid for Acinetobacter baumannii and Stenotrophomonas maltophilia clinical isolates

    Article • Journal of Antimicrobial Chemotherapy, April 2002, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  171. Activity of clinafloxacin, compared with six other quinolones, against Acinetobacter baumannii clinical isolates

    Article • Journal of Antimicrobial Chemotherapy, March 2002, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  172. In vitro activity of clinafloxacin in comparison with other quinolones against Stenotrophomonas maltophilia clinical isolates in the presence and absence of reserpine

    Article • Diagnostic Microbiology and Infectious Disease, February 2002, Elsevier

    Dr Joaquim Ruiz

  173. Molecular epidemiology and evolution of resistance to quinolones in Escherichia coli after prolonged administration of ciprofloxacin in patients with prostatitis

    Article • Journal of Antimicrobial Chemotherapy, January 2002, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  174. Decreased Invasive Capacity of Quinolone‐Resistant Escherichia coli in Patients with Urinary Tract Infections

    Article • Clinical Infectious Diseases, November 2001, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  175. Susceptibility patterns of enteroaggregative Escherichia coli associated with traveller's diarrhoea: emergence of quinolone resistance

    Article • Journal of Medical Microbiology, November 2001, Society for General Microbiology

    Dr Joaquim Ruiz

  176. Frequency of selection of fluoroquinolone-resistant mutants of Neisseria gonorrhoeae exposed to gemifloxacin and four other quinolones

    Article • Journal of Antimicrobial Chemotherapy, October 2001, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  177. Characterization of sparfloxacin-resistant mutants of Staphylococcus aureus obtained in vitro

    Article • International Journal of Antimicrobial Agents, August 2001, Elsevier

    Dr Joaquim Ruiz

  178. In vitro activity of rifaximin against bacterial enteropathogens causing diarrhoea in children under 5 years of age in Ifakara, Tanzania

    Article • Journal of Antimicrobial Chemotherapy, June 2001, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  179. In Vitro Activity of Rifaximin against Enteropathogens Producing Traveler's Diarrhea

    Article • Antimicrobial Agents and Chemotherapy, February 2001, ASM Journals

    Dr Joaquim Ruiz

  180. Prevalence of two different genes encoding NorA in 23 clinical strains of Staphylococcus aureus

    Article • Journal of Antimicrobial Chemotherapy, July 2000, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  181. Quinolone Resistance in EnterotoxigenicEscherichia coli Causing Diarrhea in Travelers to India in Comparison with Other Geographical Areas

    Article • Antimicrobial Agents and Chemotherapy, June 2000, ASM Journals

    Dr Joaquim Ruiz

  182. In vitro selected fluoroquinolone-resistant mutants of Citrobacter freundii: analysis of the quinolone resistance acquisition

    Article • Journal of Antimicrobial Chemotherapy, April 2000, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  183. Decreased permeability and enhanced proton-dependent active efflux in the development of resistance to quinolones in Morganella morganii

    Article • International Journal of Antimicrobial Agents, March 2000, Elsevier

    Dr Joaquim Ruiz

  184. Resolution of high-molecular-weight components in lipopolysaccharides of Escherichia coli, Morganella morganii, Citrobacter freundii and Citrobacter diversus strains with sodium dodecyl sulfate polyacrylamide gels

    Article • Journal of Microbiological Methods, January 2000, Elsevier

    Dr Joaquim Ruiz

  185. Analysis of the mechanisms of quinolone resistance in clinical isolates of Citrobacter freundii

    Article • Journal of Antimicrobial Chemotherapy, December 1999, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  186. Mechanisms involved in the development of resistance to fluoroquinolones in Escherichia coli isolates

    Article • Journal of Antimicrobial Chemotherapy, December 1999, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  187. Mechanisms of resistance to ampicillin, chloramphenicol and quinolones in multiresistant Salmonella typhimurium strains isolated from fish

    Article • Journal of Antimicrobial Chemotherapy, May 1999, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  188. Increase in incidence of resistance to ampicillin, chloramphenicol and trimethoprim in clinical isolates of Salmonella serotype Typhimurium with investigation of molecular epidemiology and mechanisms of resistance

    Article • Journal of Medical Microbiology, April 1999, Society for General Microbiology

    Dr Joaquim Ruiz

  189. Decreased Production of AmpC-Type β-Lactamases Associated with the Development of Resistance to Quinolones inCitrobacter freundiiStrains

    Article • Microbial Drug Resistance, January 1999, Mary Ann Liebert Inc

    Dr Joaquim Ruiz

  190. Campylobacter jejuni as a Cause of Traveler's Diarrhea: Clinical Features and Antimicrobial Susceptibility

    Article • Journal of Travel Medicine, March 1998, Oxford University Press (OUP)

    Dr Joaquim Ruiz, Dr Joaquim Gascon

  191. Increased Resistance to Quinolones in Campylobacter jejuni: A Genetic Analysis of gyrA Gene Mutations in Quinolone‐Resistant Clinical Isolates

    Article • Microbiology and Immunology, March 1998, Wiley

    Dr Joaquim Ruiz, Dr Pilar Goñi

  192. Analysis of the mechanism of quinolone resistance in nalidixic acid-resistant clinical isolates of Salmonella serotype Typhimurium

    Article • Journal of Medical Microbiology, July 1997, Society for General Microbiology

    Dr Joaquim Ruiz

  193. Quinolone-resistance mutations in the topoisomerase IV parC gene of Acinetobacter baumannii

    Article • Journal of Antimicrobial Chemotherapy, June 1997, Oxford University Press (OUP)

    Dr Pilar Goñi, Dr Joaquim Ruiz

  194. The region of the parE gene, homologous to the quinolone-resistant determining region of the gyrB gene, is not linked with the acquisition of quinolone resistance in Escherichia coli clinical isolates

    Article • Journal of Antimicrobial Chemotherapy, June 1997, Oxford University Press (OUP)

    Dr Joaquim Ruiz

  195. Mutation in the gyrA gene of quinolone-resistant clinical isolates of Acinetobacter baumannii

    Article • Antimicrobial Agents and Chemotherapy, May 1995, ASM Journals

    Dr Pilar Goñi, Dr Joaquim Ruiz

  196. High frequency of mutations at codon 83 of the gyrA gene of quinolone-resistant clinical isolates of Escherichia coti

    Article • Journal of Antimicrobial Chemotherapy, January 1995, Oxford University Press (OUP)

    Dr Joaquim Ruiz, Dr Pilar Goñi

  197. Association between double mutation in gyrA gene of ciprofloxacin-resistant clinical isolates of Escherichia coli and MICs.

    Article • Antimicrobial Agents and Chemotherapy, October 1994, ASM Journals

    Dr Joaquim Ruiz