PARASITOLOGY
parasites are organisms that obtain food and shelter by living on or inside another organism. the parasite derives all advantages from association and therefore the host might either not be harmed or might suffer the consequences with this association, a parasite disease. the parasite is termed obligate when it might live no more than in association with a bunch or it's classified as facultative when it might live each in or on any host too as within the free kind. parasites that live within the body are termed endoparasites whereas those that exist upon the body surface are known as ectoparasites. parasites that cause harm in the host are pathogenic parasites whereas those which profit due to host while not inflicting it any harm are referred to as commensals.
during this section, we shall investigate a spread of parasites of medical importance ranging in size from protozoans an example would be the amebae and trypanosomes to actually multicellular worms and flukes. we shall additionally examine a few arthropod parasites. diseases caused by these organisms embody amebic dysentary, sleeping sickness, malaria, river-blindness and elephantiasis.
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