Cell death in salivary glands of Rhipicephalus (Boophilus) microplus (Canestrini, 1887) (Acari: Ixodidae) females at semi-engorged feeding stage.
The ultrastructure of the salivary glands of Rhipicephalus (Boophilus) microplus females is described during feeding. In beginning of feeding, individuals show acini I with many mitochondria and wide basal labyrinth in peripheral cells; glycoprotein granules only in b and c3 cells (acini II); and epithelial interstitial cells with developed basal labyrinth between f cells (acini III). Semi-engorged females show cells in degeneration, with autophagic vacuoles, lysosomes, myelin figures, and irregular, condensed, and/or fragmented nuclei, in addition to apoptotic bodies. R. B. microplus points to apoptosis in these organs before the detachment from the host, in contrast to others tick species.
Nunes
Erika Takagi
ET
Departamento de Medicina Veterinária, Universidade Federal do Espírito Santo, Espírito Santo, Brazil. erikatnunes@yahoo.com.br
Furquim
Karim Christina Scopinho
KC
Bechara
Gervasio Henrique
GH
Camargo-Mathias
Maria Izabel
MI
D000818:Animals; D016923:Cell Death; D005247:Feeding Behavior; D005260:Female; D046529:Microscopy, Electron, Transmission; D048494:Rhipicephalus / Q000502:physiology / Q000648:ultrastructure*; D012469:Salivary Glands / Q000502:physiology / Q000648:ultrastructure*