Most species of bacteria can be broadly divided into two groups, known as gram-positive and gram-negative. These categories ...

Gram-positive bacteria have thick cell walls. A Gram stain test, which involves a chemical dye, stains the bacterium’s cell wall purple. On the other hand, gram-negative bacteria stain pink instead.

When bacteria retain the crystal violet dye during the Gram stain test, they are called Gram-positive bacteria. Learn more here.

A team of researchers at the University of California, Los Angeles (UCLA) has introduced a virtual Gram staining technique that could transform how microbiologists stain and classify bacteria ...

Your doctor can use a gram stain to learn if bacteria are responsible for your symptoms and what types of bacteria are present. They may also order other tests to help diagnose your illness.

New research upends what scientists know about a classic lab technique, called gram staining, used for more than a century to characterized and classify bacteria.

Learn the differences between gram positive vs gram negative bacteria, including structure, stain results and examples of key bacterial species.

Compared with other methods, urine Gram stain moderately predicted gram-negative bacteria but added little value to UTI diagnosis in the ED, raising questions about its clinical utility.

Gram staining is a type of differential staining used to distinguish between gram positive and gram negative bacterial groups.

Learn the differences between gram positive vs gram negative bacteria, including structure, stain results and examples of key bacterial species.