1. Occurrence of genes encoding aminoglycoside-modifying enzymes in Escherichia coli isolates from chicken meat.
- Author
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Nayme, K., Barguigua, A., Diawara, I., El Otmani, F., Elmdaghri, N., Zerouali, K., and Timinouni, M.
- Subjects
AMIKACIN ,ESCHERICHIA coli ,MICROBIAL sensitivity tests ,CHICKEN as food ,GENES ,ENZYMES - Abstract
1. The aim of the experiment was to determine the occurrence of genes encoding aminoglycoside-modifying enzymes (AMEs) in Escherichia coli isolates recovered from chicken meat. 2. Antibiotic sensitivity was tested using the disc diffusion test. AMEs and virulence profile were determined by PCR/sequencing. 3. Out of 195 meat samples collected, 185 (95%) isolates were identified as E. coli. Disc diffusion showed a resistance value of 22% (n = 42) for at least one of the antibiotic aminoglycosides (AGs) tested (tobramycin, gentamycin, amikacin and kanamycin). PCR screening showed the presence of three classes of AMEs, namely, aac(3)-II (12%), aac(6ʹ)-Ib (7%) and aac(2ʹ)-Ia (5%). Eight of the 42 isolates were positive for the stx
1 and sxt2 genes and were defined as Shiga toxin-producing E coli., while the eae gene was positive in one strain. Among the 42 isolates, group A was the predominant phylogenetic identified (76%), followed by group D (21%). One isolate belonged to subgroup B23 . 4. The results suggested that chicken meat could be an important reservoir of AMEs, and pose a potential risk by dissemination of resistance to humans through the food chain. [ABSTRACT FROM AUTHOR]- Published
- 2019
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