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Parasitic protozoan promastigote (Leishmania amazonensis)

Image Number: 20673B

Caption:

Parasitic promastigotes that cause leishmaniasis in humans (Leishmania amazonensis). This tropical disease is transmitted by bites from infected sand flies. They are ingested by the insect vector during a blood meal from a mammal or human. The parasites in humans are found within macrophages in the amastigote form . In the blood stream they transform into the promastigote form. Promastigotes multiple by longitudinal fission in the gut of the insect. Leishmaniasis occurs in two forms: cutaneous which affects the skin and mucous membranes, usually giving rise to an ulcer at the site of the insect bite. The more serious kala-azar causes fever and liver damage, and it can be fatal.

Keywords:

| 20673B protozoa protozoan promastigote leishmaniasis pathogen carrier kala-azar zoonosis flagellate flagella flagellum division parasite Leishmania amazonensis human disease insect vector borne SEM |

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