Journal
WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY
Volume 24, Issue 9, Pages 1741-1746Publisher
SPRINGER
DOI: 10.1007/s11274-008-9667-9
Keywords
antibiotics; broiler; Escherichia coli; farmer; resistance
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The study was conducted to quantify the concordance of antibiotic resistance and ERIC-PCR DNA fingerprint pattern in Escherichia coli (E. coli) isolated from farmers and their broilers of 95 broiler farms in Songkhla province, Thailand. Four hundred and fifty-seven and 460 E. coli isolates from both groups produced 35 patterns of antibiotics resistance. Mono-resistance to doxycycline (23.2%) in isolates from farmers and multiple resistance to doxycycline, nalidixic acid, norfloxacin and ciprofloxacin (17.8%) were the most common finding in broilers. Twenty-seven farms had 44 within-farm concordant patterns of resistance. From simulation, the frequency of concordance was significantly higher than concordance by chance alone (P < 0.05). Out of these 44 matched sets, only four had the same DNA fingerprint pattern. Concordance by DNA pattern was also not associated with phenotypic resistance. Clonal spread is therefore not a good explanation of the concordance in this population. Other mechanisms need further analysis.
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