Characterization of Multi Drug-Resistant Salmonella Species in Duck Production Chains from Nile Delta Regions
El Mansy, H., El Baz, S., Ramadan, H., Gwida, M. (2025). Characterization of Multi Drug-Resistant Salmonella Species in Duck Production Chains from Nile Delta Regions. EKB Journal Management System, (), 1-18. doi: 10.21608/ejvs.2025.344013.2556
Heba El Mansy; Shimaa El Baz; Hazem Ramadan; Mayada Gwida. "Characterization of Multi Drug-Resistant Salmonella Species in Duck Production Chains from Nile Delta Regions". EKB Journal Management System, , , 2025, 1-18. doi: 10.21608/ejvs.2025.344013.2556
El Mansy, H., El Baz, S., Ramadan, H., Gwida, M. (2025). 'Characterization of Multi Drug-Resistant Salmonella Species in Duck Production Chains from Nile Delta Regions', EKB Journal Management System, (), pp. 1-18. doi: 10.21608/ejvs.2025.344013.2556
El Mansy, H., El Baz, S., Ramadan, H., Gwida, M. Characterization of Multi Drug-Resistant Salmonella Species in Duck Production Chains from Nile Delta Regions. EKB Journal Management System, 2025; (): 1-18. doi: 10.21608/ejvs.2025.344013.2556

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 M)
Document Type: Original Article
DOI: 10.21608/ejvs.2025.344013.2556
Authors
Heba El Mansy1; Shimaa El Baz2; Hazem Ramadan2; Mayada Gwida* 2
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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