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Titre: Prevalence, antibiotic resistance, and MLST typing of Helicobacter pylori in Algiers, Algeria
Auteur(s): Raaf, Naïma
Amhis, Wahiba
Saoula, Houria
Abid, Ahmed
Nakmouche, Mhamed
Balamane, Abdelmalek
Ali Arous, Nassima
Ouar-Korichi, Mounira
Vale, Filipa F
Bénéjat, Lucie
Francis Mégraud, Francis
Mots-clés: culture, macrolide, multiple infection, random amplified polymorphic DNA, real-time PCR
macrolide
multiple infection
random amplified polymorphic DNA
real-time PCR
Date de publication: 23-sep-2018
Collection/Numéro: Wiley Helicobacter;2017;22:e12446
Résumé: BACKGROUND: Helicobacter pylori infection is common in Algeria, but there are few data on the characterization of isolated strains. The aim of this study was to update data on the prevalence of H. pylori in patients submitted to endoscopy, antibiotic resistance, and phylogeography of H. pylori strains isolated in Algiers. MATERIALS AND METHODS: This is a prospective study carried out between November 2015 and August 2016. The culture of H. pylori was performed on antral and fundic gastric biopsies of adult patients from 3 hospitals. A real-time PCR using the fluorescence resonance energy transfer (FRET) principle for the detection of H. pylori followed by a melting curve analysis for the detection of mutations associated with resistance to clarithromycin was applied. Differentiation between antral and fundic isolates of the same patient was also determined by RAPD, and an MLST typing was performed for characterization of the phylogeographic group of H. pylori. RESULTS: By real-time PCR, the prevalence of H. pylori infection among the 147 patients included was 57%. Culture was positive in only 29% of the cases. Twenty-seven percent of patients had received H. pylori eradication treatment. The primary and secondary resistance rates to clarithromycin were 23% and 36%, respectively, and to metronidazole, 45% and 71%, respectively. Only one isolate was resistant to levofloxacin, and no resistance to amoxicillin, tetracycline, and rifampicin was detected. A double population was present in 14 patients. The MLST analysis classified the 42 H. pylori strains from 38 patients in 2 haplotypes: hpEurope (33) and hpNEAfrica (9). CONCLUSION: The prevalence of H. pylori remains high in Algeria but appears to be decreasing in recent years. High resistance to clarithromycin requires increased monitoring of the evolution of antibiotic resistance and adaptation of eradication therapy.
URI/URL: http://dspace.univ-setif.dz:8888/jspui/handle/123456789/2608
ISSN: 1523-5378
Collection(s) :Articles

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