The brain-pathogens of E. coli in broiler breeders was confirmed as O22, O53 and O86 by isolation and identification of pathogen, and the oil-emulsion inactivated vaccine was produced.

• 通过病原分离鉴定，确定此次肉种鸡脑型大肠杆菌病的病原为O22、O53和O86，并以此研制出油乳剂灭活苗。