Detection and Antimicrobial Susceptibility of Salmonella spp. Isolated From Commercial Eggs in Tiaret Province, Algeria

Salmonellosis is a significant public health problem worldwide. The current study aimed to investigate the presence of Salmonella spp. in commercial eggs of Tiaret province, Algeria, and evaluate the susceptibility of isolated strains to different antimicrobial agents. A total of 180 commercial eggs collected from various retail outlets (groceries, butchers, wholesalers, street vendors) were analyzed by conventional methods, and 13 Salmonella spp. isolates were tested on a panel of 7 antimicrobial agents using the disc diffusion method. Of 180 chicken egg content samples examined, the findings indicated that 13 (7.22%) were positive for Salmonella spp. Regarding the collection site, 2 (1.11%), 4 (2.22%), and 7 (3.88%) of Salmonella spp. isolates were detected from butchers, wholesalers, and street vendors, respectively. Most antibiotic discs have demonstrated widespread resistance with an incidence rate of 100%, including amoxicillin + clavulanic acid, ampicillin, nalidixic acid, and erythromycin. However, colistin sulfate, gentamycin, and tetracycline were more effective against Salmonella isolates. It can be concluded that the highest detection rate of Salmonella spp. was observed for street vendors, and the highest resistance was recorded for commonly used antibiotics in poultry production.