Hemolymph cells and histological sections of Rhipicephalus sanguineus oocytes of control group. (A) hemocytes with normal morphology stained using the Gimenez technique . (B) Hemocyte with the presence of R. rickettsii stained using the Gimenez technique . C, D, E, F and G, detail of oocytes in all stages of development (I, II, III, IV and V) using Giemsa staining. Ch, choriun; gv, germinal vesicle; lu, lumen; nu, nucleus; p, pedicel; woc, ovary wall cells.