Contamination rate and antibiotic resistance of Escherichia coli isolated from beef and cow feces

Abstract

E. coli producing extended-spectrum β-lactamases is a great danger to public health. Meat is considered to be one of the main vectors for transmissing antibiotic-resistant bacteria strains from animals to humans. In this study, 90 samples (35 beef and 55 cow feces samples) were collected in Ha Noi City to determine the contamination rate and antibiotic resistance profile of E. coli. The studied results showed that the contamination rate of beef and cow manure samples
with E. coli was 82.86% and 61.82%, respectively. Among 63 isolated E. coli strains, there were 69.84% resistant to at least 1 antibiotic and 23 antibiotic patterns were identified. The highest resistance rate of the isolated E. coli strains to tetracycline was (42.86%), followed by ampicillin (39.68%), and sulfamethoxazole/trimethoprime (28.57%). On the contrary, the isolated E. coli strain resisting meropenem was not found. Notably, 6 isolates were found to be capable of
producing ESBL and all of them haboured blaCTX-M-1
gene.