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.

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.

Hans Christian Gram, the inventor of the Gram staining technique, was a pioneering biologist who devised the system of classification which led to as many as 30,000 formally named species of ...

Gram-negative meningitis is an infection of the meninges caused by gram-negative bacteria. These bacteria get their name from their result on a gram stain test. Gram-negative bacteria can be ...

Gram-positive bacteria are bacteria with thick cell walls. In a Gram stain test, these organisms yield a positive result. Here’s why knowing whether the result is positive or negative is important.

Influential scientist Hans Christian Gram left a durable mark on microbiology thanks to the pioneering staining technique he invented – and he’s now being celebrated with a Google Doodle on ...

The Gram stain–AOLC was positive in only two patients (7.6%) with a CRBI. Our results suggest that the Gram stain–AOLC test is not useful for the diagnosis of catheter-related bloodstream ...

Gram-positive bacteria, such as Staphylococcus, appear blue or purple under a microscope when scientists apply a stain. Conversely, Gram-negative bacteria do not hold the dye well.

Aggregatibacter actinomycetemcomitans, a naturally transformable, 5 Gram-negative facultative anaerobe, is a periodontal pathogen 6 that also belongs to the HACEK group of bacteria, which is known ...

The Gram stain is almost always the first step in the preliminary identification of a bacterial organism. Gram was then appointed a professor of medicine at the University of Copenhagen in 1900.