[Cytopathological effect of Bacillus thuringiensis israelensis endotoxins on the intestines of Aedes aegypti mosquito larvae].
The dynamics of pathological changes in the intestine of Aedes aegypti larvae under the influence of toxins Cry11A and Cry4B produced by Bacillus thuringiensis israelensis was studied by means of electron microscope. Most significant ultrastructure changes in the intestine of the second instar larvae were observed in the midgut. The cytoplasm of cells disintegrated, and elongated lacunae appeared. The number of microvilli decreased, or they disappeared in the result of destruction. The peritrophic membrane displaced to the lumen of midgut. Any changes in epithelial cells and cuticle in time of foregut and hindgut were not observed in a comparison to control. The toxin Cry4B caused the most effective destruction of the midgut epithelium.
Zalunin
I A
IA
Chaĭka
S Iu
SIu
Dronina
M A
MA
Revina
L P
LP
D000330:Aedes / Q000187:drug effects*; D000818:Animals; D001413:Bacillus thuringiensis / Q000472:pathogenicity*; D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology / Q000633:toxicity*; D001427:Bacterial Toxins; D004731:Endotoxins / Q000737:chemistry / Q000633:toxicity*; D004847:Epithelial Cells / Q000187:drug effects; D006460:Hemolysin Proteins; D007422:Intestines / Q000187:drug effects*; D007814:Larva
D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D001427:Bacterial Toxins; D004731:Endotoxins; D006460:Hemolysin Proteins; C030956:insecticidal crystal protein, Bacillus Thuringiensis