NEET BIOLOGY

Detailed explanation-1: -Parasitic protists cause disease with high mortality and morbidity. These protists include Plasmodium, Leishmania, Trypanosoma, and Toxoplasma. The diseases they cause include malaria, sleeping sickness, and Chagas disease. There is no effective vaccine for these diseases, so treatment is chemotherapeutic.

Detailed explanation-2: -Plasmodium protozoa cause malaria. The parasites are spread by a mosquito vector. Parasites enter a host’s blood through the bite of an infected mosquito.

Detailed explanation-3: -Usually, people get malaria by being bitten by an infective female Anopheles mosquito. Only Anopheles mosquitoes can transmit malaria and they must have been infected through a previous blood meal taken from an infected person.

Detailed explanation-4: -Malaria is caused by protozoa of the genus Plasmodium. Four species cause disease in humans: P falciparum, P vivax, P ovale and P malariae. Other species of plasmodia infect reptiles, birds and other mammals. Malaria is spread to humans by the bite of female mosquitoes of the genus Anopheles.