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The following diseases and viruses are included within the term Gram-negative bacteria:
What does the term Gram Negative mean?
Gram-negative is a term used to describe the reaction bacteria has to certain chemicals. When bacteria is transferred to a slide and bathed in a staining solution the cells on the slide will turn purple. Iodine will then be added to fix the colour in the cells and then a decolouriser is added to the slide. If the bacterium is Gram-negative, the decolouriser will wash the crystal violet away. A second staining agent will then be added, turning the bacteria a pale pink, but having no effect on the already purple Gram-positive bacteria.
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