Photomicrographs of the midgut of third instar larvae of A. aegypti maintained with food and treated with Burchellin. Longitudinal sections stained with HE. A. Overview of foregut (IA), midgut (IM), hindgut (IP) 20×. B. Vacuolization in gastric caeca (CG) and cellular disorder, muscle tissue with breakpoints (TM) and vacuolated cells in the foregut showing spaces between them (IA) 40×. C. Midgut (IM), alteration of basal epithelial cells of the intestine (EC), break points of the muscle tissue (TM) 40×. D. Hindgut (IP), disorder of epithelial cells (EC), granule formation (arrows), disruption of muscle tissue (TM) and vacuoles in the Malpighian tubules (TG) 40×. E. Detail of the Malpighian tubules with vacuoles and intracellular spacing (TG) 40×.