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.

Compared with other urine analysis methods, urine Gram stain has a moderate predictive value for detecting gram-negative bacteria in urine culture but does not significantly improve urinary tract ...

THE direct observation of the site of Gram stain in cells of micro-organisms could not be attempted before the ultra-thin section technique became available. However, to obtain a suitable section ...

Gram staining is one way scientists can identify bacteria. Gram-positive bacteria, such as Staphylococcus, appear blue or purple under a microscope when scientists apply a stain. Conversely ...

bogdanhoda/Shutterstock.com As you can imagine, it’s challenging to get a handle on all these bacterial species. One tool that helps scientists identify bacteria, first developed nearly 140 years ago, ...

Colorized SEM of four spherical methicillin-resistant Staphylococcus aureus Researchers compared the effect of Gram stain-guided antibiotics with guideline-based antibiotics for the treatment of ...

Japan: In patients with ventilator-associated pneumonia (VAP), gram stain-guided therapy was non-inferior to guideline-based treatment and dramatically decreased the usage of broad-spectrum ...