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

Seven days of antibiotics was noninferior to 14 days for treating Gram-negative bloodstream infections, supporting shorter ...

However, Gram-negative bacteria are distinguished from other forms of bacteria because they are protected by a second outer membrane.

Scientists say they have developed a new type of antibiotic to treat a bacteria that is resistant to most current antibiotics and kills a large percentage of people with an invasive infection.