This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
[{'content': 'Which organism can be isolated from stool & sputum - \nSelect and explain. \nA. Paragnomus, B. Fasciola, C. Chlornchis, D. P. Carini', 'role': 'user'}, {'content': 'Answer: A \nExplanation: PARAGONIMUS WESTERMANI Diagnosis Demonstration of the eggs in sputum or faeces provides definitive evidence. Complement fixation test is positive only during and sholy after active infection, while the intradermal test remains positive for much longer periods', 'role': 'assistant'}]