Protozoa

Mycology Protozoa PPT

Protozoa

Single-celled eukaryotes that feed by engulfing particles and move using pseudopodia.

Trophozoite form

The motile, reproductive, and feeding stage of protozoa.

Cyst form

The nonmotile, resting stage of protozoa that is resistant to environmental effects.

Chromatoidal bars or bodies

Dark-staining cytoplasmic inclusions of chromatin in protozoa.

Amoebae Diagnosis

Methods include finding motile trophozoites in fresh, warm, liquid stool using wet mounts and iodine preps.

Entamoeba histolytica

Pathogenic intestinal amoeba causing amoebiasis transmitted by ingestion of cysts.

E. Histolytica cyst

E. histolytica cyst

E. histolytica trophozoite

E. histolytica trophozoite

Entamoeba coli

Nonpathogenic intestinal amoeba with distinctive morphological characteristics.

Entamoeba coli cyst

Entamoeba coli trophozoite

Blastocystis hominis

A potential pathogen causing recurrent diarrhea and other gastrointestinal symptoms.

Blastocystis hominis vacuolar form

Entamoeba coli cyst

Endolimax nana cyst

Iodomoeba butschii cyst

Naegleria fowleri

A free-living pathogenic amoeba causing primary amebic meningoencephalitis.

Acanthamoeba

Naegleria fowleri

Balamuthia mandrillaris

Giardia lamblia

Protozoa causing giardiasis, transmitted through contaminated water, with distinct microscopic characteristics.

Trichomonas vaginalis

Vaginal flagellate causing infections transmitted via sexual intercourse.

Trypanosoma cruzi

Blood and tissue flagellate causing Chagas' disease, transmitted by reduviid bugs.

Leishmania

Blood and tissue flagellate causing various forms of leishmaniasis transmitted by sandflies.

Giardia lamblia

label cyst or trophozite

Left: trophozoite

Right: Cyst

Trichomonas vaginalis

Trypanosoma species

Dientamoeba fragilis

Leishmania species

Leishmania donovani Amastigote forms (LD bodies)

Leishmania donovani

Chilomastix mesnili

Trichomonas hominis

Balantidium coli trophozoite

Balantidium coli cyst

Balantidium coli

Balantidium coli

The only pathogenic human ciliate, causing intestinal infections with trophozoite and cyst stages.