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The protozoa are single celled organisms of great medical importance.
Visit: Cutaneous Infections and Infestations
I Amebae: Amebae are single celled organisms with trophozoite and cyst stages in the life cycle.
Acanthamebiasis
Pustular, chronic
ulcerating nodular lesions are present in the skin. Histologically, there is
a dense acute inflammatory infiltrate with focal abscess formation together with numerous organisms
(amoebae ,15-40 micrometer in width). Tuberculoid granulomatous lesion
together with vasculitis may be present in the deep dermis and subcutis.
II Flagellates: The flagellates are a group of protozoa that moves by flagella.
Trypanosomiasis:
III Coccidia: Coccidia are important in immunocompromised patients , have asexual and sexual cycles, and are acquired from contaminated food or water.
IV Miscellaneous
Pneumocystosis
:
Cutaneous pneumocystosis is rarely noted in patients with AIDS
(Visit:
Cutaneous
lesion associated
with AIDS).
There are foamy, amphophilic material around blood vessels. Methenamine
silver stain reveals small cysts characteristic of Pneumocystis carinii.
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Cutaneous lesion associated with AIDS |