Ã Basal body- anchors the flagellum to the cell wall and plasma membrane. Ã Hook- anchors the flagellum to the cell wall. Ã Filament- outermost region on the flagellum, composed of the protein flagellin. Ã *flagellum is made by flagelly :)
Keratoconus does not make people go blind. However the changes to the cornea can make it impossible for the eye to focus without eyeglasess or contact lenses. Keratoconus can be dangerous if laser vision correction surgery (LASIK or PRK) is performed on the eye.
The helminth causing onchocerciasis (river blindness) is transmitted by the bite of a type of blackfly that breeds near flowing water. It can cause itching and impaired vision in children, and lead to blindness in adulthood. Children are infected with the helminth causing lymphatic filariasis though mosquito bites.