Intro to Bacteria

• Bacteria (E. coli, salmonella)

• Fungi (athlete's foot, ringworm)

• Viruses (Covid, Ebola, HIV)

Bacteria are the cause of many common infections. Red, swollen skin is a sign of a bacterial infection, such as an infected cut or pimple.

Another example of a bacterial infection is a staph infection, cause by Staphylococcus aureus (pictured at the right, magnified 20,000 times.)

Not all bacteria are harmful. Bacteria benefit humans in many ways, including keeping our digestive system healthy. This is referred to as "gut health". (Gut is a common term for the stomach and intestines.)

Watch the Amoeba Sister's video, Bacteria, and answer questions after each segment. To start each segment, click on the preview image.