Gram staining is one way scientists can identify bacteria. Gram-positive bacteria, such as Staphylococcus, appear blue or purple under a microscope when scientists apply a stain. Conversely, ...

Antibiotic resistance has become a growing problem. When bacteria become antibiotic-resistant, treatment options become limited. Carbapenems are effective antibiotics that work on a wide range of ...

Bacterial skin infections occur when bacteria enter through the surface of the skin. They can cause symptoms such as swelling and inflammation. Treatment may include topical or oral antibiotics.

A type of bacteria that causes dental plaque may be behind a treatment-resistant form of colorectal cancer, a study published Wednesday in the journal Nature found. The particular bacterium, which ...