If the test results from your sputum Gram’s stain are abnormal, it means that bacteria and white blood cells have been detected. The bacteria found will be Gram-positive or Gram-negative.

Our results suggest that the Gram stain–AOLC test is not useful for the diagnosis of catheter-related bloodstream infection in HSCT recipients.

Use of Gram stains to select antibiotics for ventilator-associated pneumonia offers similar clinical outcomes as guideline-based broad-spectrum treatment, study reports.

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

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.

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 ...

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.

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.

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 ...