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

Many gram-negative bacteria are pathogenic, like Pseudomonas aeruginosa, and E. coli, and can evade antibiotics. Researchers have wanted to know more about disrupting the gram-negative cell wall ...

Gram-negative bacteria are harder to kill because of their harder cell wall. When their cell wall is disturbed, gram-negative bacteria release endotoxins that can make your symptoms worse.

Researchers from the National University of Singapore (NUS) have solved a 60-year-old mystery in bacterial cell envelope ...

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.

Gram-positive bacteria are bacteria that contain a thick cell wall. During the Gram staining process — a test that experts use to view the bacteria under a microscope — they appear purple or blue.

Gram negative bacteria have a much thinner peptidoglycan cell wall, but in addition they have an outer membrane containing lipopolysaccharides surrounding the cell and are consequently termed diderms.

Gram-positive bacteria show blue or purple after Gram-staining in a laboratory test. They have thick cell walls. Gram-negative bacteria show pink or red on staining and have thin walls.