Page 76 - MNU-PM503 Parasitology practical book

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

Case study (11):

A 41-year-old farmer presented with vague gastrointestinal complains, fatigue,
weakness, pallor and loss of weight. The physician ordered a stool analysis. Three stool

specimens, collected on alternate days, were submitted for examination for ova and
parasites. Blood sample was also drawn for complete blood count.
A moderate number of eggs were detected with occult blood in the stool. Each is

oval, translucent with blunt poles and clear extra-embryonic space. A single larva was
also observed in one stool specimen. This specimen had sat overnight at room
temperature before being examined. Haematology result revealed haemoglobin of 10.0

gm/dl.
QUESTIONS

1. Based on the patient's symptoms and morphology of the detected

eggs, which parasites are possible causes of the patient's symptoms?

2. Compare the geographical distribution of these 2 parasites.

3. How is this infection transmitted to humans?

4. Would you expect to find both eggs and larvae of these parasites in an infected

patient's stool specimen? Explain.

5. Describe the 2 larval stages of these helminths.

6. Which other nematode has larval stages, in the stool that may be confused

with the larvae of these parasites?

7. What are the causes and type of anaemia that may occur in children heavily

infected with these parasites?

8. How is this infection treated?

9. How can you control this parasitic infection?

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