Protozoa
Trypanosoma cruzi infects 11-12 million people in South and Central America and is infective to about 100-150 species of wild and domesticated mammals. It is not at all certain how many of these act as reservoirs of human infection but the armadillo is very important as in this host the infections are long-lived. The vectors [...]
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Many protozoa have symbiotic lifestyles. Symbiosis is an intimate association between two organisms. For many protozoa, these interactions involve a form of symbiosis called parasitism, in which one organism lives in or on a second organism, called a host. The host is harmed but usually survives, at least long enough for the parasite to complete [...]
The protozoa are harmful in following ways : 1. Pollution of water Drinking water in natural condition is made unpalatable by the reproduction of some free-living protozoa in it. For example, (Uroglenopsis brings fleshy odour like that of cod-liver oil. Peridinium emits smell resembling that of clam-shells. 2. Destruction of animals of food value Bioluminescent [...]
The protozoa are acellular, microscopic organisms found everywhere, in water, soil, on the body of plants and animals. Although they are minute and apparently insignificant, but they are of considerable economic value to the mankind. The protozoa are useful in the following ways: 1. Food Protozoa provide food for insect larvae, crustaceans and worms, which [...]
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Most amoebae are free-living, but some are endoparasites. They have adapted themselves to live actively in the intestine of many invertebrates and vertebrates. Besides weakening the host body by obtaining nourishment from it, these may cause diseases and. hence, called pathogenic parasites. One of such pathogenic amoebae is Entamoeba histolytica. It causes amoebic dysentery’ or [...]
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