It is indicated that chimozine is relative to the forming of peritrophic membrane (PMb) and the den-sity of PMb determined whether Nosema Apis Zander can inject in the ventriculus epithelium.

• 蜜蜂中肠酪素酶与蜜蜂中肠围食膜的形成有关，而围食膜的致密度又决定了蜜蜂微孢子虫能否侵入蜜蜂中肠上皮细胞。