Primary and secondary antibiotic resistance of Helicobacter pylori strains isolated in central Italy during the years 1998-2002.
Dig Liver Dis
; 35(8): 541-5, 2003 Aug.
Article
em En
| MEDLINE
| ID: mdl-14567457
ABSTRACT
BACKGROUND:
Antibiotic resistance of Helicobacter pylori is the most common reason for failure in its eradication.AIM:
To determine the incidence of primary and secondary resistance to tinidazole, clarithromycin and amoxycillin in Helicobacter pylori isolates from dyspeptic patients in central Italy and to evaluate the modifications of resistance over the period from 1998 to 2002.METHODS:
H. pylori strains were isolated from antral biopsies taken during upper endoscopy in 406 dyspeptic patients with no previous therapy against H. pylori, and in 96 patients who had already undergone one or more triple therapies. Antibiotic susceptibility test was performed using the screening agar method and agar dilution method.RESULTS:
Overall primary resistance to tinidazole, clarithromycin and amoxycillin was 36.7, 23.4 and 0.2%, respectively. Secondary resistance rates were tinidazole 69.8%, clarithromycin 82.3% and amoxycillin 1%. Resistance to clarithromycin was often associated with tinidazole resistance and was significantly higher in female patients (p<0.05). Primary and secondary antibiotic resistance did not change during the 4 years of observation.CONCLUSIONS:
The dyspeptic population with H. pylori infection in central Italy shows high levels of antibiotic resistance. Primary resistance to clarithromycin is most frequent in female patients. In patients with secondary resistance, dual resistance to clarithromycin and tinidazole is found in the majority of cases.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Infecções por Helicobacter
/
Farmacorresistência Bacteriana Múltipla
/
Antibacterianos
/
Antitricômonas
Tipo de estudo:
Incidence_studies
/
Prognostic_studies
Limite:
Adolescent
/
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
País/Região como assunto:
Europa
Idioma:
En
Revista:
Dig Liver Dis
Assunto da revista:
GASTROENTEROLOGIA
Ano de publicação:
2003
Tipo de documento:
Article
País de afiliação:
Itália