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What is 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? and explain in detail?
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.