Topic: Counterstain
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What is a counterstain?
counterstain: a stain of contrasting color that is used when the principal stain does not show the structure clearly Read More »
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What is the counterstain in a spore stain?
the counter stain is safranin 0.5% Read More »
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What is coun·ter·stain?
(koun'tər-stān') n. A stain of a contrasting color used to color the components in a microscopic specimen that are not made visible by the principal stain. tr.v. , -stained , -stain·ing , -stains . To color (a microscopic specimen) with suc... Read More »
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Counterstain
[(n.) Second stain of a different color applied to a microscopic specimen and used to color and contrast those parts not retaining the first stain
(v.) To treat (a microscopic specimen) with a counterstain
(v.) To become counterstained; take a counterstain
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1. a stain of contrasting color that is used when the principal stain does not show the structure clearly
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counterstain: a stain of contrasting color that is used when the principal stain does not show the structure clearly
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Source: http://www.kgbanswers.com/whats-the-definition-of-counterstain/13...
A counterstain, safranin is applied, which stains the colorless gram-negative cells. the appearance of gram positive cells is unchanged because the primary stain, crystal violet, is a much more intense stain than safranin.
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to turn the non-acid cells a different color than the acid-fast cells
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To distinguish between gram postive and gram negative bacteria. Gram postive bacteria will stain blue or purple and gram negative bacteria will stain pink or red.
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Source: http://wiki.answers.com/Q/What_is_the_purpose_of_the_counterstain...
A differential stain uses 2 dyes of contrasting color to help distinguish between different microbial groups or cell parts. A counterstain is used in a differential stain procedure as a contrasting dye to the primary stain.
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Source: http://wiki.answers.com/Q/What_is_the_Difference_between_differen...
