Which of the following isNOT considered a bacterial disease?

HIV, or Human Immunodeficiency Virus, is not considered a bacterial disease because it is a viral infection. This means that it is caused by a virus, whereas the other options listed—tuberculosis, Legionnaires' disease, and tetanus—are all caused by bacteria. Tuberculosis is caused by Mycobacterium tuberculosis, Legionnaires' disease is attributed to Legionella pneumophila, and tetanus results from Clostridium tetani. Understanding the differences between viral and bacterial infections is crucial in microbiology and infectious disease management, as each type has distinct characteristics, modes of transmission, and treatment protocols.