Waterborne diseases spread by pathogenic bacteria include which of the following?

The spread of waterborne diseases involving pathogenic bacteria is specifically associated with organisms that can contaminate water sources and subsequently affect human health through ingestion of contaminated water. Typhoid, cholera, and dysentery are all illnesses directly linked to bacteria that thrive in polluted or inadequately treated water.

Typhoid fever, caused by Salmonella typhi, is transmitted through ingesting food or water contaminated with feces from an infected person. Cholera, caused by Vibrio cholerae, spreads in a similar manner, often in areas with poor sanitation. Dysentery, particularly bacterial dysentery caused by Shigella, is also transmitted through contaminated water or food.

These conditions highlight how important clean water sources and proper sanitation practices are in preventing waterborne diseases. The other options listed do not pertain to waterborne bacterial infections. For instance, the flu and cold are viral illnesses, HIV and syphilis are sexually transmitted infections, and allergies and asthma are not infectious diseases at all but rather hypersensitivity and respiratory conditions.