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What is Poers of Infection" are - and explain in detail?
Ans. is 'b' i.e., Housefly o Houseflies are exceptionally efficeint mechanical spreaders of disease. They transpo microorganisms on their feet and hairly legs. Pathogenic organisms, ova and cysts have been recovered from the bodies of the common housefly. Housefies arc therefore called "poer of infection".