Surveillance of diarrheagenic Escherichia coli infection in Yanping and Yongan, Fujian Province, China / 中国人兽共患病学报

ABSTRACT

We investigated the epidemiological characteristics of diarrheagenic Escherichia coli (E.coli) infection in Fujian Province,providing reference for the prevention and control of diarrhea epidemic and outbreak.Yanping and Yongan areas were selected as surveillance sites from year 2010 to 2015,where 1 950 samples were collected from the sentinel hospitals,and then samples were isolated and cultured on MacConkey agar plates.Suspected strains were identified by routine and molecular diag nosis technique methods.Results were analyzed by SPSS 17.0 software package.A total of 129 strains of diarrheagenic E.coli were isolated with a total detection rate of 6.62％.The detection rates of enteropathogenic E.coli(EPEC),enterotoxigenic E.coli(ETEC) and enteroadhesive E.coli(EAEC) were 3.33％,1.64％ and 1.64％ respectively (including 61 strains of atypical EPEC,4 strains of typical EPEC,and 32 strains of ETEC and EAEC for each),while EHEC and EIEC were not found.There was no significant difference between the detection rates of male and female.All the patients were divided into five groups according to the age,and there were no significant differences between the detection rates of EPEC,EAEC and ETEC in the 5 groups.The detection rates were the highest in August and September.There was no significant difference between the detection rates of rural area and uban area.There was also no significant difference between the composition ratio of diarrheagenic E.coli (DEC) in the two surveillance sites.In conclusion,there were three kinds of DEC in Fujian Province,and EPEC was the dominant.August and September were the months with the highest detection rates.Children age less than five and adult aged 20 59 years were the high risk groups with DEC infection.More attention should be attached on the rational treatment by antibiotic for DEC.