What is the benefit of using Gram Stain for cytology in clinic?
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While Diff Quick is useful for identifying Malassezia and white blood cell types, it stains all bacteria the same colour - purple! Therefore, it can be hard to distinguish short rod shaped bacteria (bacilli) from round bacteria (cocci), as they will be the same colour, and a similar shape.
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Gram Stain is useful for identifying different bacteria as it stains gram negative bacteria pink/orange and gram positive bacteria a dark blue/ purple. In dermatology, gram negative bacteria are almost always bacilli, and gram positive bacteria are almost always cocci. Therefore we can differentiate the shapes based on colour!
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Knowing which bacteria are involved in skin and ear infections allows us to choose the correct treatment.
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The Gram Stain technique we use here at Dermcare is simple and quick!