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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 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 ...

A man in his 40s presented with pharyngeal pain and right cervical lymphadenopathy that persisted for 1 month. His right tonsil was swollen and covered with exudate; however, a rapid streptococcal ...

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, Gram ...

Gram stain procedure - Gram staining a sample. 1. Gently flood the smear with crystal violet and leave for 1 minute. Tilt the slide slightly and gently rinse with tap water or distilled water. Crystal ...

Gram-positive bacteria have a thick wall that the solvent can’t penetrate, so they stay stained. The Gram stain helps doctors categorize what type of bacteria are present in an infection, both by the ...

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 ...