Identify the organism in the picture. It is an infectious protozoan.
The picture shows Leishmania, the protozoan organism that causes kala-azar. These organisms are oval-shaped, and each has one long whip-like structure. One organism (arrow) is dividing, while a cell of the immune system (lower right) has gripped on the two whips of the dividing organism and is in the process of eating up the organism.