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Antibiotic resistance of Salmonella from raw chicken meat at retail markets in Vinh Long Province

Journal of Applied Biology and Biotechnology, ISSN: 2347-212X, Vol: 13, Issue: 2, Page: 258-265
2025
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Article Description

Salmonellosis is one of the most prevalent foodborne illnesses worldwide. This study aimed to evaluate the prevalence and antibiotic susceptibility of Salmonella isolates derived from raw chicken meat sold at various retail markets in Vinh Long Province, Vietnam. The results indicated that 100% of the chicken meat samples contained high densities of Salmonella spp. A total of 21 Salmonella isolates were obtained from these samples during this investigation. Using PCR techniques and 16S rRNA gene sequencing, three bacterial strains (SP5_7, SP8_8, and SP9_9) were identified as Salmonella spp., with similarities of 95.31%, 97.89%, and 93.60%, respectively. The antibiogram results revealed that the Salmonella isolates were highly sensitive to ampicillin-sulbactam (90%), sulfamethoxazole-trimethoprim (67%), and doxycycline (52%), and were completely sensitive to gentamicin. Conversely, significant resistance was observed against ampicillin (86%), tetracycline (71%), amoxicillin (62%), and ciprofloxacin (57%). Notably, 86% of the strains exhibited multiresistance to three to ten antibiotics, with the highest proportion (19%) showing resistance to three antibiotics. Furthermore, 18 out of the 21 strains presented a multiple antibiotic resistance (MAR) index >0.2, indicating frequent exposure to antibiotics. These findings underscore the necessity for stricter control measures in the sale of fresh chicken in markets to mitigate the spread of Salmonella in the environment.

Bibliographic Details

Thi Cao Van Quach; Truc Trung Nguyen

Open Science Publishers LLP

Biochemistry, Genetics and Molecular Biology; Agricultural and Biological Sciences

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