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To heighten the contrast between viruses and the background, use is made of electron-dense "stains". These are usually compounds of heavy metals of high atomic number, that serve to scatter the electrons from regions covered with the stain. If virus particles are coated with stain (positive staining), fine detail may be obscured. Negative staining overcomes this problem by staining the background and leaving the virus relatively untouched. The negative stain is moulded round the virus particle, outlining its structure, and is also able to penetrate between small surface projections and to delineate them. If there are cavities within the virus particle that are accessible to the stain, these will be revealed and some of the internal structure of the virus may be disclosed.
What else can I help you with?
What is the gram stain of enterobacter cloacae?
Enterobacter cloacae is a Gram-negative bacterium. It will stain pink or red in a Gram stain procedure.
Is counterstain a negative stain?
No, counterstain is not a negative stain. A counterstain is a secondary stain used in microscopy to color structures that were not stained by the primary stain, usually to provide contrast. Negative staining involves staining the background instead of the cells or structures of interest.
Is uranyl acetate a negative stain?
Yes, uranyl acetate is used as a negative stain in electron microscopy.
Why can treponema denticola be seen with negative staining?
Because it is a Gram-negative bacterium and can be stained with Gram-negative stain.
What color is Gram- stain?
Gram- negative bacteria turns red to pink after the gram stain is performed.
What is the gram stain for cholera?
Gram Negative
Do acid-fast bacteria stain gram-negative when subjected to the gram stain?
No, acid-fast bacteria do not stain gram-negative when subjected to the gram stain.
What is the gram stain of enterobacter cloacae?
Enterobacter cloacae is a Gram-negative bacterium. It will stain pink or red in a Gram stain procedure.
Is HIV gram stain positive or negative?
The answer to whether HIV gram-stain positive or negative is that HIV gram-stain is negative. They retain the light red or pink color after the stain.
What is shigella dysenteriae gram stain?
Negative
What is the other name for Negative staining?
Negative staining is also known as indirect staining because the stain does not directly interact with the specimen.
What is the Gram stain result of Salmonella?
Gram Negative.
What Gram stain is acetobacter?
Gram negative
Is the acid fast stain positive or negative in the sample?
The acid-fast stain is positive in the sample.
What does a negative result for a spore stain indicate about the organism?
A negative result for a spore stain indicates that the organism does not form endospores. Endospore formation is a survival mechanism for some bacteria to withstand harsh environments, so a negative result suggests that the organism may be more susceptible to environmental stressors.
Is counterstain a negative stain?
No, counterstain is not a negative stain. A counterstain is a secondary stain used in microscopy to color structures that were not stained by the primary stain, usually to provide contrast. Negative staining involves staining the background instead of the cells or structures of interest.
Is uranyl acetate a negative stain?
Yes, uranyl acetate is used as a negative stain in electron microscopy.
