To understand the epidemiology and main biological characteristics of Escherichia coli(E.coli) in pigs from Henan regions, 152 fecal samples were collected from diarrhoea pigs from 2014 to 2016, and the isolation, identification, phylogenetic grouping analysis, drug sensitivity test and biofilm formation ability of E.coli in these fecal samples were conducted. The results showed there were 79 strains of E.coli were isolated from the 152 collected fecal samples, among which, 46.84%(37/79) belonged to the A g...