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

Find out the differences between gram-positive bacillus and gram-negative bacillus and how they may affect health.

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

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

Gram-positive and gram-negative bacteria differ in the composition of their cell walls. Gram-negative bacteria have a double layer of protection, making them more difficult to kill, Muñoz said.

Gram-negative bacteria show pink or red on staining and have thin walls. They release different toxins and affect the body in different ways. Gram-positive and Gram-negative are types of bacteria.

The diagram below illustrates the differences in the structure of Gram positive and Gram negative bacteria. The two key features that lead to the differing visualization properties of Gram positive ...