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What do you know about bacteria?
Wiki User
∙ 14y ago
A bacteria smear refers to a technique wherein a small sample of bacteria is spread on a microscope slide for observation. The discussion surrounding bacteria smears typically revolves around examining the morphology, arrangement, and staining characteristics of the bacteria. It is an essential tool for identifying and studying bacterial species.
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What happens if you don't heat fix a smear prior to staining of a bacterial slide?
smear will be washed( no smear will be left on the slide)
What is the most common shape of bacteria seen in a typical cheek smear?
streptococci
What is a gram variable bacteria?
gram-positive bacteria but can become gram negative if the smear is left to culture for a long period of time.
What is a common mistake made when preparing a bacterial smear that results in large aggregates of bacteria piled on top of one another?
This is often the result of using far too many bacteria. You only need to take a very small loop from the bacterial culture to make a clear smear.
What might be the source if an unexpected bacteria appears on a finished smear even if a clean slide was used?
contamination of the stains.
What would be the result of overheating the bacterial smear?
your sample can destroy the bacteria and it will appear shapeless or enlarged when you overheat the bacterial smear
What happens if you don't heat fix a smear prior to staining of a bacterial slide?
smear will be washed( no smear will be left on the slide)
What is the most common shape of bacteria seen in a typical cheek smear?
streptococci
Why is it necessary to excessively rinse the smear with water in experiment identifying bacteria using gram stain?
smear should be rinsed with distill water so that all the small particles attach to the smear will washed away such as some time the crystals of dye are attached to the smear which give the illusion of microbial cell some time, distill water is used because it is free from other microbial cell and ions which can harm the smear.
What is a gram variable bacteria?
gram-positive bacteria but can become gram negative if the smear is left to culture for a long period of time.
What is the cause of pus cells in a smear test?
A fungi or a bacteria that causes an infection in your vagina.
How is strep bacteria determined?
Strep bacteria can be obtained by swabbing the back of the throat or the rectum with a piece of sterile cotton. Microscopic examination of the smear can identify which type of bacteria has been collected.
What is the Result of over heating the bacterial smear?
When you heat the bacteria more than three times on the flame of Bunsen burner, the bacteria will damage and if you stain this damaged bacteria, the shape of bacteria is not typical and sometimes you just see the residue of stain on the slide.
How should a smear specimen be fixed and why?
Heat fixed; because it kills the bacteria,firmly affix the smear to the microscope slide, and allow the sample to more readily take up the stain.
Why dont you run water directly over the bacteris smear?
so that the bacteria doesnt come off
What is a common mistake made when preparing a bacterial smear that results in large aggregates of bacteria piled on top of one another?
This is often the result of using far too many bacteria. You only need to take a very small loop from the bacterial culture to make a clear smear.
What might be the source if an unexpected bacteria appears on a finished smear even if a clean slide was used?
contamination of the stains.
