الفهرس 
Occurrence and characterization of non- typhoidal Salmonellae in chicken meat
Occurrence and characterization of non- typhoidal Salmonellae in chicken meatOnly 14 pages are availabe for public view
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Abstract
Salmonella serovars, chicken, Egypt, carbapenemases, colistin, global health, mcr genes,
MDR)
Salmonella species are important zoonotic pathogens that cause gastrointestinal diseases in humans and animals.
Poultry meat and their products contaminated with these pathogens are one of the major sources of human
Salmonella infections. The continuous spread of multi-drug resistant Salmonellae has become a serious
worldwide health problem. It presents a risk for the treatment of salmonellosis in both humans and
animals. The current study investigated the occurrence, characterization, and antimicrobial resistance of
non-typhoidal Salmonellae isolated from different chicken cuts and washing water. A total number of 260
chicken samples (45 chicken liver, 45 chicken thigh, 160 chicken neck, and 10 washing water) were
collected from several shops and small-scale poultry processing plants distributed in Cairo and Giza
Governorates, Egypt. Salmonellae were detected, identified, and finally serotyped using the
recommended methods. Isolated serovars were subjected to antibiotic profiling for the most common
used antibiotics in veterinary and human medicine especially carbapenem and colistin. Screening of
resistant genes for carbapenem (blaKPC, blaOXA-48, blaNDM, blaIMP, and blaVIM) and colistin (mcr-1, mcr-
2, mcr-3, mcr-4, mcr-5, mcr-6, mcr-7, mcr-8, and mcr-9). Different Salmonella serotypes including S.
Kentucky, S. Typhimurium, S. Enteritidis, S. Anatum, and S. Blegdam were detected in 22 chicken
samples. InvA and stn virulence genes could be identified in all Salmonella isolates. All serotypes were
susceptible to carbapenem and colistin and did not hold any of the tested carbapenem and colistinresistant
genes. S. Anatum showed resistance to 12 antibiotics from all tested sets, however, S. Kentucky
showed resistance to 6 antibiotics. Meanwhile