Abstract
In this study, a total of 228 raw meat samples (pork: 76, beef: 76, chicken: 76) and 301 raw seafood samples (fish: 199, shrimp: 67, squid: 35) were collected randomly at traditional markets in Ho Chi Minh City (Vietnam). In meat, the ratio of Salmonella spp. was 70.61% (161/228). Among the contaminated meat samples, pork was infected with a ratio of 90.79 % (69/76) while the contamination ratios in beef and chicken were 43.42% (33/76) and 77.63% (59/76), respectively. Salmonella contamination was detected in fish (40.20%), shrimp (7.46%) and squid (17.14%). Because of sulfonamide group is used in Salmonella treatment, the study focused on sulfonamide resistance. In fresh seafood comparison, there were 32.56%, 40% and 10% Salmonella showing resistance to sulfamethoxazol in fish, squid and shrimp, respectively. In fresh meat comparison, there were 31.58%, 16.67% and 55.56% Salmonella showing resistance to sulfamethoxazol in pork, beef and chicken, respectively. Interestingly, there were 21 serovars including 19 identified serovars including S. Kentucky (8), S. Agona (2), S. Infanis (4), S. Saintpaul (1), S. Indiana (1), S. Braenderup (1), S. Potsman (2) and 2 unidentified serovars showing different phenotype to this antibiotic. Among the 21 serovars, only 23.81% strains carried both genes (sul1, sul2). For the sul1 gene, 61.9% strains were presented while sul2 occupied at a lower rate than sul1 with the rate of 52.38%. The study is very interesting and useful to go more functional analysis in sulfonamide resistance.
Highlights
Food safety is one of the issues that we have been concerned about for a long time
Because of sulfonamide group is used in Salmonella treatment, the study focused on sulfonamide resistance
228 raw meat samples and 301 raw seafood samples were collected eventually at conventional markets in the districts of Ho Chi Minh City. 150 g -1.500 g of each sample were collected for the study
Summary
Food safety is one of the issues that we have been concerned about for a long time. This is one of significant factors for the sustainable development of socio-economic system, and public health in Vietnam. The need for strengthened prevention, surveillance and management, of foodborne disease is extremely important at the present and future. This makes a significant contribution to economic development, poverty reduction and international integration. Salmonella spp. are the most widely distributed causes of foodborne outbreaks in human.[1] They are the foodborne hazards that are responsible for the highest annual burden and the largest number of deaths globally. The prevalence of Salmonella spp. in 25 g meat samples from HCMC was 71.8% (chicken), 70.7% (pork), and 62.2% (beef)
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