Laboratory investigation for one gastroenteritis outbreak caused by Campylobacter jejuni
10.3760/cma.j.cn112338-20200109-00025
- VernacularTitle:一起空肠弯曲菌导致急性胃肠炎暴发事件的病原特征分析
- Author:
Lin ZOU
1
;
Ying LI
;
Guilan ZHOU
;
Bojun ZHEN
;
Ping ZHANG
;
Nan JIANG
;
Fengling ZHAO
;
Jianguo WANG
;
Hongjun LI
;
Yanchun WANG
;
Guofeng ZHANG
;
Maojun ZHANG
Author Information
1. 北京市通州区疾病预防控制中心 101100
- Keywords:
Acute gastroenteritis;
Pathogen screening;
Campylobacter jejuni;
Genetic analysis
- From:
Chinese Journal of Epidemiology
2020;41(10):1692-1696
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To understand the etiological characteristics of an acute gastroenteritis outbreak.Methods:Real-time polymerase chain reaction (PCR) and bacteria cultures were performed for the samples, including stool samples from patients and cooks, environmental swabs, raw food material (chicken meat), collected during the outbreak. Pulsed-field gel electrophoresis, antibiotics susceptibility test and whole-genome sequencing were performed for the Campylobacter jejuni isolates. Results:Four stool samples from patients were positive for Campylobacter jejuni by real-time PCR, in which 1 Campylobacter jejuni strain was isolated from a case who had no antibiotic treatment. Twelve Campylobacter jejuni and 7 Campylobacter coli isolates were obtained from 4 raw chicken meat samples. The Campylobacter jejuni strain isolated from the case was resistant to nalidixic acid, ciprofloxacin, chloramphenicol, florfenicol and tetracycline. The MLST analysis with the whole-genome sequences confirmed that the Campylobacter jejuni isolate from the case belonged to ST10075. Antimicrobial resistance genes cmeABCR, tetO/M and blaOXA-61 were found in the genome of the isolate from the patient by the whole-genome sequencing. No mutation in 23S rRNA was found and the C257T mutation in gyrA was identified in this isolate. Conclusion:Laboratory analysis indicated that Campylobacter jejuni infection might be the major cause of this gastroenteritis outbreak.
