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Gram stain

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.14 sec.
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Noun1.Gram stain - a staining technique used to classify bacteria; bacteria are stained with gentian violet and then treated with Gram's solution; after being decolorized with alcohol and treated with safranine and washed in water, those that retain the gentian violet are Gram-positive and those that do not retain it are Gram-negative
staining - (histology) the use of a dye to color specimens for microscopic study


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Tissue culture from secretions from both patients showed gram-positive cocci in clusters on the Gram stain, and subsequent cultures yielded MRSA.
A variety of diagnostic techniques were used; the analyses were based on the 1,938 women who had complete data for assessment of bacterial vaginosis according to Nugent Gram stain criteria.
and Canada, announces the completion of a clinical study that proves the proprietary layered thin film (LTF(TM)) QuickVue(R) Advance pH and Amines rapid test achieves a clinical sensitivity of 92 percent, specificity of 95 percent and overall accuracy of 94 percent when compared to traditional, more time consuming and more technically demanding procedures such as Amsel clinical criteria and Gram Stain for the diagnosis of bacterial vaginosis (BV).
 
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