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  • Title: Antibiotic resistance of Campylobacter jejuni isolates recovered from humans with diarrhoea in Turkey.
    Author: Kayman T, Abay S, Aydin F, Şahin O.
    Journal: J Med Microbiol; 2019 Feb; 68(2):136-142. PubMed ID: 30540246.
    Abstract:
    PURPOSE: This study was aimed at investigating the occurrence and genetic mechanisms of resistance to ciprofloxacin, tetracycline and erythromycin in clinical isolates of Campylobacter jejuni recovered from human cases of acute gastroenteritis in Turkey. METHODOLOGY: MIC values of each antibiotic were determined with the epsilometer test (E-test). Resistance genes/mutations were first screened by PCR and analysed by subsequent DNA sequencing. RESULTS: From a total of 152 C. jejuni isolates tested, 113 (74.3%), 38 (25%) and 9 (5.9%) were found to be resistant to ciprofloxacin, tetracycline and erythromycin, respectively. Sequence analysis of ciprofloxacin-resistant isolates showed that all resistant strains (n=113) carried Thr-86-Ile substition in the gyrA gene, which is the most frequently observed mutation in fluoroquinolone-resistant Campylobacter. All of the tetracycline-resistant isolates (n=38) carried the tetO gene. All of the erythromycin-resistant isolates (n=9) harboured the point mutation A2075G in the 23S rRNA gene, which is the most common mutation conferring macrolide resistance in C. jejuni. CONCLUSION: The phenotypic susceptibility testing results were found to agree well with those obtained by genetic detection methods for the C. jejuni isolates tested. The findings of this study showed a very high level of resistance to ciprofloxacin and to a lesser extent to tetracycline while resistance to erythromycin remained at a low level. Thus, erythromycin may be considered as the first choice for treatment of Campylobacter infections in this geographical region when indicated.
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