Recently. Some newspapers carry news about increased incidences of malaria in nearby villages of out city. The Chief Medical Office of the district asked the scientists (zoologist) and their team to conduct through survey of the area and suggest neccessary steps. The survery revealed that public services were in very poor shape. As a result lot of garbage and dirty water had accumulated at places which provide ideal sites of breeding of mosquitoes and disease carrying agents (such as house flies, cockroaches, etc.). Recall what you have studied about human diseases in the class and answer following questions:
(i) Name causative agent of malaria which insect vector spread it.
(ii) Which step the zoologist immediately look to check the disease?
(iii) Name the most common antimalarial drug being used. From where it is obtained?

Explanation

(i) Malaria is caused by the toxins produced in human body by malarial parasite, Plasmodium (a protozoan), Female Anophees mosquito sucks blood of human being and in the process spreads the malarial parasite in humansl.
(ii) Immediate spray and fumigation of insecticides to kill adult mosquitoes as well as their larvae. Petrol or kerosene is sprinkled on dirty/ waste waters ditches,pools, puddles, etc., to kill eggs and larvae of mosquitoes.
(iii) Quinine, bark of Cinchona tree.