Page 30 - MNU-PM503 Parasitology practical book

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

3- Intestinal trematodes (Heterophyes heterophyes)

1- Adult:

- Pyriform in shape with broad

posterior end.

- Size: 1.5-3 mm.

- 3 suckers, oral (small), ventral (large)

and genital.

- 2 simple intestinal caeca.

- 2 oval testes, opposite each other,

posteriorly.

- Oval mid plane ovary in front of testes.

- Few large postero-lateral vitelline

follicles.

2- Egg:

- Oval.

- Size: 30X15 u.

- Yellowish-brown.

- Thick shelled.

- Operculated.

- Small knob posteriorly.

- Mature (contains miracidium).

24