Why is malaria prevalent in wetlands? Who is the causative agent of this disease?

The causative agent of malaria is the parasitic protists of the genus Plasmodium. Previously, the disease was called swamp fever, as it was most often contracted in swamps. This is due to the fact that the disease vector is the malaria mosquito, which is so named for an obvious reason. The swamps are home to many insects, including mosquitoes. They become the main cause of malaria infection. But thanks to vaccination and the development of medicine, the morbidity and mortality from this disease has decreased significantly over the past 20 years.