Bacteria are transmitted to humans through air, water, food, or living vectors. The principal modes of transmission of bacterial infection are contact, airborne, droplet, vectors, and vehicular.

How does a person get a bacterial infection?

Bacteria must enter your body for them to cause an infection. So you can get a bacterial infection through an opening in your skin, such as a cut, a bug bite, or a surgical wound. Bacteria may also enter your body through your airway and cause infections like bacterial pneumonia.

What are three ways bacteria spread?

Most germs are spread through the air in sneezes, coughs, or even breaths. Germs can also spread in sweat, saliva (spit), and blood. Some pass from person to person by touching something that is contaminated, like shaking hands with someone who has a cold and then touching your own nose.