Serogroup, integrons, MDR and biofilms determined for 243 E. coli isolates from China.
O2 and O78 are predominant serogroups, with O1 serogrop having low incidence.
fimC and ompA were detected in > 95% and Class I integron in > 77% of isolates.
Biofilm forming ability is related to multiple drug resistance in 55 strains.
MDR is common and related to biofilms, virulence genes and Class I integron.