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.

蜜肠酪素酶与蜜肠围食膜的形成有关，而围食膜的致密度又决定了蜜虫能否侵入蜜肠上皮细胞。