A 35 years old man presented with dry cough and rusty coloured sputum; He has history of eating in chinese restraunt very often with consumption of crabs often; What is the probable causative agent in this condition?
Diphyllobothrium latum
Pneumocystis jirovecii
Paragonimus westermani
Strongyloides stercoralis
from above mentioned clinical scenerion Paragonimus westermani (lung fluke) is moste likely to be causitive organism:- Paragonimus westermani first intermediate host- snail 2nd intermediate host - crab in crab metacercarie larva which is cyst like stage is seen. It causes Red Brown sputum or endemic hemoptysis.
Parasitology Pa 2 (Helminthology)