Infection of Ascaris usually occurs by

Step-by-step solution

Infection of Ascaris occurs in a healthy person due to contaminated water, vegetables, fruits, etc. Mosquitos bite causes malaria due to the entry to Plasmodium parasite into the blood. Eating imperfectly cooked pork causes trichinosis disease (parasitic disease). Tse-tse fly causes trypanosomiasis, on infection of the central nervous system.