LEISHMANIASIS-PROTOZOA

It is caused by the species of leishmania, the leishmania donovani is the causative agent of kala-azar or visceral leishmaniasis.Mostly  widespread inindia,south china and in mediterranean countries. The major cause is the enlaregement of spleen due to blockage of reticulo-endothelial system by parasite.l.tropica is the causative agent of skin leishmaniais.l.brasilliensis causes a disease called espundia.The development of uiceration in nasal cavities,mouth and pharynx is quite frequent.Leishmania species are transmitted from man to man by bites of sandflies belonging to the genus phlebotomus.