Serotypes and drug resistance of salmonella in commercial food in Pudong New Area from 2020 to 2022
Journal Title: Shanghai Journal of Preventive Medicine - Year 2023, Vol 35, Issue 4
Abstract
ObjectiveTo understand the serotype distribution and drug resistance of salmonella contaminated in commercially available food.MethodsSalmonella detectionï¼ including the serotypesï¼ was conducted in food products sold in Pudong New Area from 2020 to 2022. The antimicrobial susceptibility test of 15 antibiotics was conducted by the broth microassay.ResultsA total of 118 salmonella strains were detected in 2 497 pieces of foodï¼ with a total detection rate of 4.7%. The dominant detection categories were poultry meatï¼ livestock meat and aquatic products. The 118 salmonella strains could be divided into 24 serotypesï¼ Salmonella enteritidis ï¼26.4%ï¼ï¼ Salmonella Typhimurium ï¼16.2%ï¼ and Salmonella delpy ï¼14.4%ï¼ were the main dominant types. Salmonella had the highest resistance rate to ampicillin ï¼63.6%ï¼ï¼ followed by tetracyclineï¼ chloramphenicolï¼ cotrimoxazole and nalidixic acid. Among the three dominant serotypesï¼ the multidrug resistance rate of Salmonella typhimurium was the highest ï¼89.5%ï¼ï¼ followed by Salmonella delpy ï¼70.6%ï¼ and Salmonella enteritidis ï¼61.3%ï¼.ConclusionLivestockï¼ poultry meatï¼ and aquatic products are seriously contaminated by salmonella with diverse serotypes. The livestock meat is mainly contaminated by Salmonella typhimurium and Salmonella delpyï¼ and the poultry meat is mainly contaminated by Salmonella enteritidis. The drug resistance spectrum is wide and the multi-drug resistance rate is high. Different from the livestock and aquatic isolatesï¼ poultry meat-derived strains have high tolerance to ampicillinï¼ nalidixic acid and polymyxinï¼ and carry certain potential food safety risks.
Authors and Affiliations
LIANG Yanru,CHEN Nuo,YANG Bowen,WANG Xiao,DING Jin,GUI Yanhua,QIU Huifang,HAO Lipeng,PAN Lifeng,
Keywords
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