One disease NOT caused directly by bacteria is

One disease that is NOT caused directly by bacteria is malaria. Malaria is actually caused by a parasite called Plasmodium, which is transmitted through the bites of infected mosquitoes. Bacteria, on the other hand, are single-celled microorganisms that can cause a wide variety of illnesses, including tuberculosis, pneumonia, and cholera. Tetanus is caused by a bacterium that enters the body through a wound or cut, while pneumonia and tuberculosis are caused by bacteria that affect the respiratory system. Cholera, on the other hand, is caused by a bacterium that infects the small intestine and can lead to severe diarrhea and dehydration. So, in summary, while malaria is caused by a parasite, all the other diseases listed in the options are caused directly by bacteria.