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?: (A) Diphyllobothrium latum, (B) Pneumocystis jirovecii, (C) Paragonimus westermani, (D) Strongyloides stercoralis
Answer is C. 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.