Epidemiologic and etiologic characteristics of foodborne diseases active surveillance in Baiyin City, 2016-2018

Objective To study the epidemiologic and etiologic characteristics of Salmonella, Shigella, Vibrio parahemolyticus, diarrheagenic Escherichia coli (DEC) from foodborne diarrhea patients in Baiyin. Methods Stool samples were collected from foodborne disease patients in Baiyin during 2016-2018 and pathogenic bacteria strains were isolated and identified by biochemical characteristics, serotyping, drug resistance test and pulsed-field gel electrophoresis (PFGE). Results A total of 300 strains were isolated from 1 003 stool samples, the overall positive rate was 29.9% and the positive rate of DEC was the highest (29.1%, 292/1 003), followed by that of Salmonella and Shigella, and Vibrio parahemolyticus were not detected. Totally 1 003 foodborne disease cases were reported and the ratio of male and female was 1.3:1, the detection rate of pathogenic bacteria in female patients (31.8%, 136/428) was higher than male patients (28.5%, 164/575), the patients were mainly adults aged 19-59 years and young children under 5