ABSTRACT
Objective To understand the risk factors of vibrio parahaemolyticus sporadic infection in Jiaxing, and to provide evidence to prevent and control foodborne diseases. Methods Case-control study was used and the food borne disease surveillance system was retrieved from 2013 to 2016. Based on the diagnostic criteria for infectious diarrhea (WS 271—2007) , laboratory confirmed vibrio parahaemolyticus sporadic cases in Jiaxing City were enrolled into the case group. According to the ratio of 1 :1, the healthy population matched by identical community, gender and age was enrolled into control group. Questionnaire survey was used to collect the general information and risk factors of participants. The risk factors were analyzed by conditional multivariate logistic regression. Results A total of 211 vibrio parahaemolyticus sporadic cases and 211 healthy persons were investigated. There were no statistically significant difference about educational level, and the occupational distribution between case group and control group (P>0.05) . The onset time of 79.62% cases was primarily from July to October, and the clinical symptoms were mainly diarrhea (100.00%), abdominal pain (86.73%), nausea (56.40%), and vomit (51.66%) . Conditional logistic regression analysis showed that eating out 5 days prior to onset (OR=2.11, 95%CI: 1.15-3.86), eating marine fish (OR=2.72, 95%CI:1.01-7.37) and marine shrimps (OR=4.42, 95%CI: 1.22-15.97) were the independent risk factors. Conclusion The major risk factors of vibrio parahaemolyticus sporadic infection of residents in Jiaxing were eating out 5 days prior to onset, eating marine fish and eating marine shrimps. Food safety supervision and resident awareness of food safety should be strengthened to lower the incidence risk of foodborne diseases such as vibrio parahaemolyticus infection.
ABSTRACT
Objective To learn the epidemiological characteristics and the disease burden of Vibrio parahaemolyticus diarrhea,and to provide the evidence for developing the scientific food -borne diseases prevention and control strategies. Methods Seven counties in Jiaxing City,and one general hospital from each was selected to be investigated.Feces or anal swabs of clinical diarrhea cases during the research period were collected to test Vibrio Parahaemolyticus,and the information about direct or indirect medical expense and other indirect expense were collected from the positive cases by household survey.Results 2 711 diarrhea cases were reported in 2014,and 71 cases were Vibrio parahaemolyticus positive,the infection rate was 2.62%.The number of cases peaked during July to October,and 33.80% were farmers. The majority of serum type were O3:K6 and O4:K8,taken up 70.42%.The disease burden of every case was 927.76 Yuan per time.The speculated annual total population economic burden of Vibrio parahaemolyticus diarrhea in Jiaxing was 15 963.8 thousand Yuan .The disease burder of rural cases was heavier than that of urban ones (P <0.05).The disease burden of females was heavier than males (P <0.05 ).The difference of disease burden among age groups were not statistically significant(P >0.05).Conclusion The disease burden of Vibrio parahaemolyticus diarrhea was heavy.The supervision of catering units and the advertisement of food hygiene information should be strengthened to lower the incidence level and disease burden.