AIIMS 2018 Zoology Parasitic Infections MCQ Question

Ascariasis is transmitted primarily through the ingestion of eggs of the Ascaris lumbricoides parasite, which are commonly found in contaminated food and water (H₂O). When these eggs are ingested, they hatch in the intestines, leading to infection. Option (A) is incorrect because Ascaris does not spread through the air; option (B) is incorrect as mosquitoes are not vectors for this parasite; and option (D) is irrelevant since infected needles are associated with bloodborne pathogens, not intestinal parasites like Ascaris. Understanding these transmission routes is crucial for preventing infection and promoting public health.