Page 56 - MNU-PM503 Parasitology practical book

Pharm D- Clinical Pharmacy Program Third Level Parasitology and virology (PM503)

1- Entamoeba coli

Cyst:

a- Rounded.
b- 15-25 U. in diameter.
c- Contains 8 nuclei (at different levels).

d- No chromatoid bodies in mature cyst.

2- Entamoeba histolytica
Cyst:

a- Rounded.

b- 10-20 μ in diameter.
c- Contains 4 nuclei (at different levels) and
rod-shaped chromatoid bodies with

rounded ends.

Definitive host - Man.

Reservoir host - Dogs, rat and monkey

Infective stage - Four nucleated cyst.

Mode of infection - Ingestion of mature cysts in fecally contaminated

food, water, or hands
Diagnostic stage - Cyst and trophozoite

Site of localization - Lumen of the colon

Diagnosis

• Symptoms, history and epidemiology are the keys to diagnosis.

• In the laboratory, the infection is confirmed by finding cysts in the stool.
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