ideo-. a combining form representing idea, in compound words: ideology. Origin of ideo-. ide(a) + -o-.
Smallpox. Smallpox is a disfiguring and potentially deadly infectious disease caused by the Variola major virus. Before smallpox was eradicated, there were two forms of the disease worldwide: Variola major, the deadly disease, and Variola minor, a much milder form.According to some health experts, over the centuries smallpox was responsible for more deaths than all other infectious diseases combined.efore smallpox was eradicated, there were two forms of the disease worldwide: Variola major, the deadly disease, and Variola minor, a much milder form.
Mycobacterium leprae: The bacillus responsible for leprosy (Hansen disease). Mycobacterium leprae is an obligate parasite that has to live within cells.There it is able to withstand the onslaught of enzymes and other forces by virtue of possessing a peculiarly resistant waxy coat and thanks also to its association with lowered cellular immunity. See also: Hansen disease.ycobacterium leprae: The bacillus responsible for leprosy (Hansen disease). Mycobacterium leprae is an obligate parasite that has to live within cells.