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How will a gram stain sample appear if the culture is contaminated?
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How do you think the stain changes the sample?
A stain is the result of an interaction between substances.
What would cause a fluro pink stain to appear on wooden floor?
kids!
What are the properties that differentiate the spore from the vegetative cell?
In the spore stain malachite green is used as a primary stain. This is driven into the cell by heat because of the impermeability of the spore. The stain is allowed to sit for 30 mins to make sure it gets in to the endospores.The stain is then washed and counterstained with safranin red. The endospores retain the green colour from malachite green and of course appear green under the microscope. Whereas the vegetative cells will appear red.
Why did you use a young culture for flagella stain?
Young cultures are typically used for a flagella stain because they are healthier and livelier. This helps the flagella get seen easier since the bacteria are continuously moving.
Why should the the slide be flooded with a strong carbol fuschin?
so dat the bacterial sample smear can be mixed with the primary stain throgh heating
Suppose you are viewing a smear of a pure sample and you see both pink-red and purple cocci what is going on here?
The sample result is unclear. A number of variables could contribute to mixed results including contaminated equipment, not enough iodine when staining the sample, too much ethanol when rinsing, or not the sample did not heat long enough.
How do you think the stain changes the sample?
A stain is the result of an interaction between substances.
When treated with Gram stain Gram-positive bacteria appear?
Gram positive bacteria retain the violet stain, and appear purplish under a microscope.
Can a human urine stain appear white on black clothing?
NO
What is structural characteristic of monocyte?
Neutrophils have a multilobed nucleus that can appear to be multiple nuclei. The granules of a neutrophil are very fine and stain a pale lavender.
How would an endospore stain of e coli appear?
Negative cocci red
What would cause a fluro pink stain to appear on wooden floor?
kids!
What type of microscopy is the negative stain similar to?
The darkfield microscope. "darkfield microscopy"
What is the medical term that causes the cornea to appear green?
Fluorescein stain causes the cornea to appear green with lit with a Woods lamp.
Why are contrasting colors important in gram staining?
# Suppose you performed a gram stain on a sample from a pure culture of bacteria and observed a friend of red and purple cocci. Adjacent were not always the same color. What do you conclude? # ## The bacteria was not a pure culture.
What will happen after treating different types of bacteria with a Gram stain?
Some bacteria will appear purple, whereas other bacteria will appear red.
How do you detect blood on a window frame?
Use a UV light. The blood stain will appear black.
