Science, asked by siddhanarayan, 1 year ago

5 Protozoa and disease caused by them

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Answered by anjali403
1
1. Leishmaniasis:

This disease is caused by Leishmania, a flagellate protozoan which is transmitted from man to man by sandflies belonging to genus Phlebotomus.

Amoebiasis:

Amoebiasis, also known as amoebic dysentry, is caused by Entamoeba histolytica which was discovered in 1875 by F. Loesch.

Diarrhoea:

Diarrhoea is caused by Giardia intestinalis (a flagellate protozoan)

Trichomoniasis:

Three species of Trichomonas, a tetraflagellate protozoan, are parasitic in the human body. T. intestinalis is found mainly in the mouth of elderly persons with the bad teeth, periodontosis, etc.; and T. vaginalis inhabits the lower parts of the vaginal apparatus mostly of 18 to 45 years of age and causes vaginitis (vaginal trichomoniasis). The vaginitis is characterized by burning sensation, itch and frothy vaginal discharge. Infection is transmitted through sexual intercourse and toilet articles.

Disease # 5. Tripanosomiasis:



There are two types of tripanosomiasis: African and American. African tripanosomiasis, also called “sleeping sickness”, is a dangerous disease especially in tropical Africa and is caused by two closely related species of Tripanosoma, namely, T.gambliense and T.rhodesiense.

The disease is characterized by cachexia, anaemia, fever, aedema of the brain, chronic leptomeningitis, haemorrhages and kidney-lesions. The patient becomes more somnolent, sinks into a coma and quite frequently dies. The disease is transmitted by a tsetse fly (Glossinia palpalis).

American tripanosomiasis, also called “Chiga’s Disease” is a widespread disease in southern and central part of America and is caused by Schizotryanum cruzi. Children are more susceptible to this disease. Swelling of the body parts, severe headache and continuous fever are the features of the disease. The disease is transmitted by various species of Triatoma, a bug.

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