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. read more
ADVERTISEMENTS: Protozoans: Useful and Harmful Protozoans (explained with diagram)! You may have seen some of these unicellular organisms in the drop of pond water you observed under the microscope. They are traditionally looked upon as animals, because most protozoans are animal-like. read more
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. read more
Protozoans that cause diseases. The protozoan Endamoeba histolytica causes amoebiasis (amoebic dysentery) in human beings, Giardia causes giardiasis (dysentery), while Plasmodium causes malaria. trypanosome, a parasitic protozoan which lives in the bloodstream of human beings, cattle and other animals, causes a dangerous disease called sleeping sickness. read more