Which one of the following infectious diseases is NOT transmitted by wastewater?

AIDS, caused by the Human Immunodeficiency Virus (HIV), is primarily transmitted through specific bodily fluids such as blood, semen, vaginal fluids, and breast milk. The risk of transmission through wastewater is negligible because HIV does not survive well outside the human body and is sensitive to environmental factors.

In contrast, the other listed diseases can be associated with pathogens that may be found in wastewater. For example, tetanus is caused by a bacterium that can enter the body through wounds contaminated with soil or feces, which may include wastewater. Tuberculosis is spread via airborne particles from infected individuals, but it is important to note that while the bacteria can be present in certain environments, it is not typically linked to wastewater directly. Polio, caused by a virus, is transmitted through the fecal-oral route, making exposure to contaminated water sources a viable transmission pathway.

Thus, the reasoning for AIDS being the correct answer lies in its distinct transmission modes, which do not involve wastewater exposure.