[Cytological study of the action of Bacillus thuringiensis var. israelensis on mosquito larvae].

A comparison is made between the cytopathological effects of B. thuringiensis var. israelensis on Aedes aegypti larvae and the cytopathological effects of the other varieties of B. thuringiensis on Lepidoptera larvae. The same primary action is observed, with the loss of integrity of the gut epithelium, the cells of which appear swollen, distorted and finally burst.