Methods:Serotypes of Y. pseudotuberculosis were identified by comparing the difference of O-antigen gene clusters of experimental strains with that of standard reference strains.

• 方法:通过比较假结核耶尔森菌与已知血清型假结核耶尔森菌标准参考株O-抗原基因簇的差异,确定实验株的血清型。