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.

Bacterial vaginosis is confined to an asymptomatic ... solution (positive whiff or sniff test). As an alternative, Gram-stain-based microbiological diagnosis of BV has been proposed.

The QUANTOM™ Total Cell Staining Dye is a green fluorescent nucleic acid stain that has been formulated to permeate the membranes of both gram positive and gram negative bacteria with ease.

This field focuses on the isolation and identification of organisms using staining and biochemical techniques ... particulate or cellular (e.g. bacteria, viruses, tumor cells, foreign red blood cells ...

What can? Gram's stain experiment pointed toward some sort of difference in the structures of various bacterial cells. However, it was not until the early 1950s that scientists started to ...