Published by Hans Christian Gram in 1884, gram staining distinguishes gram-positive bacteria (purple) from gram-negative bacteria (pink). Gram-positive critters, such as staph, have a thick ...

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

Gram-positive cocci (including 22 strains of hemolytic staphylococci) alone were isolated from the wounds of 20 patients and in combination with gram-negative bacteria in 5 patients.

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 ...