To analyse the etiological characteristics of Yersinia enterocolitis isolated from meat in Liaoning Province.
Pathogenic biological analysis, multilocus sequence typing (MLST) test and drug resistance detection analysis were conducted on Yersinia enterocolitica isolated from meat products.
A total of 40 strains of Yersinia enterocolitica were detected from meat in 2024. Serotypes were O:8, O:3 and O:5, mainly O:8. The biological types were type 1A and type 3. Virulence gene detection could be divided into 4 types, the main type was type I carrying foxA. The 40 Yersinia enterocolitica isolates were divided into 10 groups of pluse field gel eletrophoresis (PFGE) dominant band types A-J. Group A had a higher proportion. MLST was divided into 26 types, among which there were 10 new types. STN16 and STN11 were located in the core and diverged to the periphery. Nalidixic acid resistance rate was the highest in drug sensitivity test, followed by streptomycin, ciprofloxacin and ampicillin resistance.
There are 3 serotypes of Yersinia enterocolitis isolated from meat in Liaoning Province in 2024, and the biotypes are very concentrated. The virulence genes are mainly type I, and the sequence type (ST) genotypes show diversified and divergent distribution and multiple antibiotic resistance mode. The supervision of pig, cow, chicken and other meat foods should be strengthened.
| 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 |