Previous research by other scientists had looked at the enzyme's tie-ins to asthma, which, like nasal polyps, is an inflammatory response of the body's immune system. The theory, Lane says, is that ...

Three types of parasites can cause disease in humans. They are protozoa, carried by mosquitos, helminths, such as roundworm, and ectoparasites, for instance lice and bed bugs. Parasites are organisms ...