A patient presents with progressive dyspnoea. Chest X-ray revealed a cavitary lesion in lower lobe of right lung. The following histopathological appearance was seen of resection of the cavity. What is the most likely cause of this disease and the number of layers that can be seen in the wall of the parasite?
|A.||Cysticercosis with 3 layers|
Strongyloides with 2 layers
Echinococcus with 2 layers
Paragonimus with 2 layers
Ans: C. Echinococcus with 2 layers
(Ref Panikers Parasitology 7/e p127, 6/e p153; Jawetz 27/e p736; Sahiston 20/e p1452, 19/e p1447-1449; Blumgart 5/e p1035-1048: Shackelford 7/e p1459-1462)
- The histopathology image given is typical of hydatid cyst, caused by Echinococcus granulosus.
Cysts of Echinococcus:
- Enclosed by inner, nucleated, germinative layer & outer, opaque, non-nucleated layer.