. Which one of the following diseases is not caused by bacteria
- Out of four options given above, malaria is a protozoan disease while typhoid, anthrax and tuberculosis are bacterial diseases.
- Malaria is caused by the protozoa Plasmodium. There are two species of Plasmodium ( Plasmodium falciparum and Plasmodium vivax) that are dangerous. So, it is the correct option.
- Anthrax, typhoid and tuberculosis are bacterial diseases caused by B. anthracis, S. typhi and M. tuberculosis respectively. So, these are not correct options.
Hence, the correct answer is (D) Malaria.