Organisms seen on Gram stain of unspun urine

A Gram stain (Appendix 9) may also be prepared.

The Gram stain can distinguish between the two main types of bacteria (Gram positive and Gram negative).

It stains purple when the Gram stain method is used (gram-positive).

Gram staining tests of different bacteria. © Interspecifics

This video will demonstrate one such technique, known as Gram staining.…

For example, as with all Gram-bacteria detected by a staining technique called Gram staining: they then appear pink under the microscope.

What colour are Gram-positive bacteria stained during Gram staining?

For example, as with all Gram-bacteria detected by a staining technique called Gram staining: they then appear pink under the microscope.

For example, as with all Gram-bacteria detected by a staining technique called Gram staining: they then appear pink under the microscope.

Gram staining is a determining factor in bacterial taxonomy (classification).

Gram negative bacteria are bacteria that do not retain their crystal violet dye in the gram staining protocol.

Gram-negative bacteria are bacteria that do not retain crystal violet dye in the Gram staining protocol.

Gramnegative bacteria are bacteria that do not retain crystal violet dye in the Gram staining protocol.

Gram –Ve bacteria are those bacteria that do not retain crystal violate dye in the gram staining protocol.