Why is protozoa harmful?

Protozoa. The protozoa are one-celled microorganisms. You need a microscope to see them. They do breathe, move, and reproduce like multi-celled animals. They live in water or at least where it is damp. Some protozoans are harmful to man because they can cause serious diseases. read more

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. ‘Protozoa’, in fact, means ‘the first animal’. read more

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

There are three types of Protozoa. 1 type can kill the human immune system . He other two are not harmful to humans. read more