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parasite

(Encyclopedia)parasite, plant or animal that at some stage of its existence obtains its nourishment from another living organism called the host. Parasites may or may not harm the host, but they never benefit it. T...

toxoplasmosis

(Encyclopedia)toxoplasmosis, infection caused by Toxoplasma gondii, a single-celled parasitic microorganism that can infect most warm-blooded animals but reproduces only in animals of the cat family, who shed the p...

commensalism

(Encyclopedia)commensalism kəmĕnˈsəlĭzˌəm [key], relationship between members of two different species of organisms in which one individual is usually only slightly benefited, while the other member is not a...

trypanosome

(Encyclopedia)trypanosome trĭpˈənəsōmˌ [key], microscopic, one-celled protozoan of the genus Trypanosoma, typically living as an active parasite in the bloodstream of a vertebrate; hundreds of species are kno...

epiphyte

(Encyclopedia)epiphyte ĕpˈəfītˌ [key] or air plant, any plant that does not normally root in the soil but grows upon another living plant while remaining independent of it except for support (thus differing fr...

plasmodium

(Encyclopedia)plasmodium, name for a stage in the life cycle of a slime mold. Also, Plasmodium is the name given to the genus of the protozoan parasite that causes malaria. ...

Grassi, Giovanni Battista

(Encyclopedia)Grassi, Giovanni Battista jōvänˈnē bät-tēˈstä gräsˈsē [key], 1854–1925, Italian zoologist. He demonstrated (1898) that the Anopheles mosquito carries the plasmodium of malaria in its dige...

Chagas' disease

(Encyclopedia)Chagas' disease, disease of South and Central America caused by the parasite Trypanosoma cruzi. It usually affects children and young adults and is transmitted by the feces of infected insects, typica...

Laveran, Charles Louis Alphonse

(Encyclopedia)Laveran, Charles Louis Alphonse shärl lwē älfôNsˈ lävəräNˈ [key], 1845–1922, French physician. While an army surgeon in Algiers he discovered (1880) the parasite that causes malaria and wro...

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