Ticks and Disease

activity adults Africa Amblyomma andersoni animals appear areas associated attached base basis become bite blood body broad capitulum cattle cells cheliceral closely colour complete coxa cuticle cytoplasm Dermacentor disease distribution dogs dorsal drop effects eggs engorged evidence external feeding female fever fluid frequently further glands grooves hairs hard host humidity hypostome increase infection inner Ixodes known larvae lateral layer Lees legs length less male margin moubata moult muscles narrow natural nymphs observed occur organ outer pair parasites pass period plate posterior present produced range records region relative remain reported ricinus rickettsiae rounded salivary scutum seasonal secretion segment sheep short shown similar skin slightly species spur stages suggested surface takes temperature ticks tissues transmission transmitted unfed vector ventral virus wall weight