Objective To investigate an outbreak caused by non-O1 and non-O139 serogroups cholera in an university in Hefei and analyze the causes of the incident, so as to provide references for prevention and control strategies of similar cases in the future. Methods Epidemiological investigations were conducted on patients and staff working in the canteen; and anal swabs and patient vomit were collected.Canteen, food processing, environmental sanitation and water quality were also investigated.Related specimens were collected and detected.Case-control study was used analyze risk factors. Results There were 91 cases in the event, and 96.7% of patients had diarrhea, which was the main symptom.The incubation was among 7-48 hours.The non-O1 and non-O139 serogroups cholera was detected from 2 employees, 11 sufferers, 2 reserved samples and the specimens of tablewares.The case-control studies showed that the canteen A was the risk factor,OR95%CI= 2.77-5.33,and outbreak and times of taking meals had a dose response relationship(χ2=19.44, P＜0.001).By the multivariate analysis, the lunch on May 29th, the breakfast and lunch on May 30th were independent variables. Conclusion The foodborne outbreak was caused by non-O1 and non-O139 serogroups cholera, which might be caused by the food and tableware contaminated by the canteen workers.
Key words
School /
Foodborne disease /
Vibrio cholerae /
non-O1 and non-O139 serogroups /
Public health emergency
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