The positiveness of S. boydii is higher than S. dysenteriae, and the mixed infection between them is majority. but the mixed in fection between Shigellae and pullorosis is less.

• 鲍氏血清型阳性率高于痢疾型，并以二者混合感染为主，而该病与鸡白痢鸡伤寒的混合感染很少发生。