Malignant tertian malarial parasite, belongs to class

Explanation

Malignant tertian malarial parasite is caused by Plasmodium falciparum. Plasmodium falciparum is one of the species of protozoan parasites responsible for causing malaria in humans. It is known for causing severe and potentially fatal cases of malaria, especially in young children and non-immune individuals. The disease caused by Plasmodium falciparum is often referred to as "malignant tertian malaria."