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JAC Advance Access published online on November 28, 2002
Journal of Antimicrobial Chemotherapy, doi:10.1093/jac/dkg023
© 2002 by The British Society for Antimicrobial Chemotherapy
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© 2002 The British Society for Antimicrobial Chemotherapy

In Brief

Characteristics of clinical Helicobacter pylori strains from Ecuador

Yvette J. Debets-Ossenkopp 1*, Germán Reyes 2, Janet Mulder 1, Birgit M. aan de Stegge 1, José T. A. M. Peters 1, Paul H. M. Savelkoul 1, J. Tanca 3, Amado S. Peña 4, Christina M. J. E. Vandenbroucke-Grauls 1

1 Department of Clinical Microbiology and Infection Control, Vrije Universiteit Medical Centre, de Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
2 Department of Molecular Biology, Universidad Católica, Guayaquil, Ecuador
3 Department of Gastroenterology, SOLCA Hospital, Guayaquil, Ecuador
4 Department of Gastroenterology, Vrije Universiteit Medical Centre, de Boelelaan 1117, 1081 HV Amsterdam, The Netherlands

* Corresponding author. E-mail: yj.debets{at}vumc.nl.

Received 24 June 2002 ; revised 11 August 2002 ; accepted 27 September 2002

Abstract

In Ecuador, Helicobacter pylori infections are highly prevalent. A total of 42 H. pylori clinical isolates from 86 patients attending the outpatient clinic of the gastroenterology department of the university hospital of Guayaquil in Ecuador were characterized. Their susceptibility, and cagA and vacA status were determined. Resistance to metronidazole and clarithromycin was found in 80.9% and 9.5% of strains, respectively. Neither amoxicillin- nor tetracycline-resistant strains were found. The most prevalent genotype was the cagA+, vacA s1b,m1 type. This genotype was associated with gastric cancer and peptic ulcer. Typing by random amplified polymorphic DNA showed no genetic relationship among the strains.

Keywords: Helicobacter pylori, Ecuador, antibiotic resistance, typing, virulence factors
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