Full
Outline
To investigate the contamination characteristics, serotype distribution and drug resistance of Salmonella in food sold in Zibo City, Shandong Province.
According to the National food contamination and hazardous factors risk monitoring manual, Shandong Province food contaminant and harmful factor risk monitoring work manual and GB 4789.4—2016 Food microbiological examination-Salmonella inspection.Isolation, identification and serotyping of Salmonella from 19 kinds of and 1812 food samples collected from 2015 to 2024. The antibiotic drug types were determined by referring to the recommendations of the Clinical and Laboratory Standards Institute (CLSI), and the minimum inhibitory concentration (MIC) was measured using the micro broth dilution method.
A total of 131 strains of Salmonella were detected, with an overall detection rate of 7.23%(131/1812). Among them, the detection rate of meat and meat products was the highest, reaching 21.02% (95/452), followed by animal aquatic products at 13.96% (31/222). The detection rates were higher in summer and autumn, which were 19.10% (68/356) and 17.48% (54/309) respectively, showing obvious seasonality, and the detection rate in the circulation link (19.43%, 122/628) was significantly higher than that in the catering link (4.39%, 9/205). The main dominant serotypes were Salmonella enteritidis (13.74%, 18/131), Salmonella indiana (8.40%, 11/131) and Salmonella derby (6.11%, 8/131). There were differences in dominant serotypes among foods from different species:Poultry-derived meat products were mainly dominated by Salmonella enteritidis (12.21%, 16/131), pork-derived meat products were mainly dominated by Salmonella derby (5.34%, 7/131), and animal aquatic products were mainly dominated by Salmonella ituri (3.82%, 5/131) and Salmonella aberdeen (3.82%, 5/131). The drug resistance analysis results showed that the overall drug resistance rate of 131 Salmonella strains was 80.15% (105/131), and the proportion of multi-drug resistance was 77.14% (81/105); the highest resistance rate was 67.18% (88/131) for ampicillin, followed by tetracycline (63.36%, 83/131) and trimethoprim/sulfamethoxazole (51.15%, 67/131).
Salmonella contamination in Zibo City is mainly found in meat and meat products, with diverse serotypes and severe drug resistance and multi-drug resistance. Regulatory authorities should strengthen the supervision of meat products, animal based aquatic products, and related breeding processes, and remind consumers to pay attention to food hygiene during the high incidence season of infection to prevent foodborne Salmonella infections.
9
2
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62662699(Operation and Technical Support)
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
