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Moraxella catarrhalis is a Gram negative bacterium. Thus, after the decolorizer is used, its thin cell wall won't retain the primary stain. The stain is washed away, and Moraxella catarrhalis is colorless.

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What is the decolorizer used in the capsule stain?

The decolorizer used in the capsule stain is a dilute solution of 20% copper sulfate. It is used to remove the purple crystal violet stain from the background and bacterial cells, leaving only the capsule stained.


What would the results be if you used the TB decolorizer during the spore stain?

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How do you recognize diplococci?

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What can be used for a simple stain procedure?

Perhaps Gram Staining? Steps are as follows: 1. Crystal Violet, 2. Iodine, 3. Decolorizer, 4. Safrinin


What liquid is the decolorizer?

The decolorizer commonly used in various staining processes, such as in microbiology or histology, is typically alcohol, such as ethanol or isopropanol, or a mixture of acetone and alcohol. In Gram staining, for instance, 95% ethanol is used to decolorize the smear after the crystal violet and iodine steps. This process helps differentiate between Gram-positive and Gram-negative bacteria based on their cell wall characteristics.


What are two reasons why gram-positive cells may appear pink after the completion of the gram-stain?

If they were old and the cell membrane had degraded, or if you used too much decolorizer.


What is the gram stain of pneumonia?

Pneumonia can be caused by different types of bacteria, so the Gram stain result can vary. Common bacteria causing pneumonia like Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis are Gram-positive, while others like Klebsiella pneumoniae and Pseudomonas aeruginosa are Gram-negative. Gram staining is just one method used in identifying bacteria causing pneumonia, and further tests are often required for accurate diagnosis and treatment.


Why is decolorization necessary when performing a gram stain?

During the procedures of a gram stain, decolorization is necessary to remove any stain or color from the gram negative cells. When a dye is used to stain gram positive cells, both gram positive and gram negative cells retain color. Mordant is used to bind the original stain to gram positive cells so when decolorizer is used they retain color. After the mordant has been used a decolorizer is used to wash away colo in gram negative cells. Counterstains are used to stain gram negative cells to better visualize contrasting cells. An example of a decolorizer that works well is ethanol.


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What is the purpose of alcohol used in the gram stain?

The alcohol is a decolorizer. In gram negative organisms, the small amount of peptidoglycan can't hold onto the crystal violet in the presence of the alcohol and so becomes decolorized. The gram positive organisms have a much thicker peptidoglycan layer, and so the crystal violet stays in even with washing by alcohol.


Purpose of decolorizing agent?

The decolorizer, usually acetone or alcohol, is used to wash the Crystal Violet stain from the Gram Negative cells. From this point Safranin stain is used to stain the Gram Negative cells. The final color for Gram Negative will be a Red/Pink color.