The strain of gram-negative bacteria, LY-58, was isolated from pharyngeal mucous membranes of healthy Pekin ducklings on a duck farm in Hexian of Anhui province.

• 从健康鸭咽部分离到一株革兰氏阴性短杆菌，定名为LY-58株。 经培养性状、形态学检查、生理生化试验、血清学鉴定及PCR鉴定，分离株鉴定为鸭疫里氏杆菌2型。