$Trypanosoma cruzi$ causes:

In the life cycle of $Plasmodium$,human is the:

Assertion $A$: $A$ patient suffering from malaria experiences chills and high fever.
Reason $R$: The rupture of red blood cells by the $Plasmodium$ parasite releases a toxic substance called haemozoin into the blood.

The secondary host of the malaria parasite is

Fever in malaria is due to

The causal organism of Kala-azar is