Question

Which of the following options is incorrect regarding the contraction of Polio?

(a) It spreads through intestinal discharges

(b) It spreads through contaminated food and water

(c) It spreads by flies

(d) It spreads through mosquito bites

This question was addressed to me in semester exam.

I need to ask this question from Viral Diseases in Humans-1 topic in portion Human Health and Disease of Biology – Class 12

Answer 1

Right option is (d) It spreads through mosquito bites

Explanation: Polio disease mainly spreads through intestinal discharges like the faeces. It may also spread through contaminated food or water and by flies or other insects which contaminate food or drink. Poliovirus usually enters the body through the alimentary canal where it multiplies and then reaches the nervous system via bloodstream.