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.

肠酪素酶与肠围食膜的形成有关，而围食膜的致决定了微孢子虫能否侵入肠上皮细胞。