Characterization of Multi Drug-Resistant Salmonella Species in Duck Production Chains from Nile Delta Regions | ||||
Egyptian Journal of Veterinary Sciences | ||||
Articles in Press, Corrected Proof, Available Online from 11 February 2025 PDF (1.5 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/ejvs.2025.344013.2556 | ||||
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Authors | ||||
Heba El Mansy1; Shimaa El Baz2; Hazem Ramadan2; Mayada Gwida ![]() | ||||
1Hygiene and Zoonoses departement, Mansours University, Egypt | ||||
2Department of Hygiene and Zoonoses, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt | ||||
Abstract | ||||
This study provided up-to-date information regarding the circulation of virulent and multidrug- resistant Salmonella spp. throughout duck production chains in Egypt. The investigation encompassed 338 samples from both household and commercial duck farms, including cloacal swabs (n = 150), duck organs (n = 60), egg surface swabs (n = 10), egg yolks (n = 10), feed and water samples (n = 30 each), and duck breeder stool specimens (n = 48). Conventional methods were employed to screen all samples for Salmonella species. Identified Salmonella isolates underwent species-specific PCR and testing for virulence genes (invA and stn) and some selected antimicrobial resistance genes (tetA, sul1, aadA1, qnrA, and aac-6-Ib). Based on the invA gene, Salmonella species were isolated at a rate of 14.79% (50/338), with 82% (41/50) of these isolates testing positive for the stn gene. The most frequently detected resistance genes were aadA1 (28/50), followed by qnrA (18/50), sul1 (17/50), aac-6-Ib (14/50), and tetA (13/50). Furthermore, the predominant Salmonella serotypes emerged were S. Enteritidis, S. Typhimurium, and S. Kentucky. A significant proportion of Salmonella isolates displayed antimicrobial resistance to ceftazidime (98%) and ampicillin (96%). These findings indicate widespread multidrug-resistant Salmonella spp. throughout Egyptian duck production chains, potentially posing a significant public health risk due to possible transmission to humans via the food supply. | ||||
Keywords | ||||
InvA; Enteric pathogens; Eggs; MDR; ducks; Egypt | ||||
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