What is the most common protozoan disease worldwide?
Parasitic and ProtozoalLeishmaniasis is a relatively common protozoal infection worldwide. The most prevalent species causing disseminated leishmaniasis is Leishmania donovani.
Are protozoa harmful to humans?
Some protozoans are harmful to man because they can cause serious diseases. Others are helpful because they eat harmful bacteria and are food for fish and other animals. There are three different types of protozoa: Ameba, Paramecium, Euglena.
How do protozoa infect humans?
Protozoa that live in the blood or tissue of humans are transmitted to other humans by an arthropod vector (for example, through the bite of a mosquito or sand fly). Entamoeba histolytica is a protozoan. A microscope is necessary to view this parasite.
What diseases are caused by helminths?
Neglected tropical diseases
- Soil-transmitted helminthiases.
- Roundworm infections such as lymphatic filariasis, dracunculiasis, and onchocerciasis.
- Trematode infections, such as schistosomiasis, and food-borne trematodiases, including fascioliasis, clonorchiasis, opisthorchiasis, and paragonimiasis.