Definition A stool Gram stain is a laboratory test that uses different stains to detect and identify bacteria in a stool sample. The Gram stain method is sometimes used to rapidly diagnose bacterial infections. Alternative Names Gram stain of stool; Feces Gram stain How the test is performed You will need to collect a stool sample. There are many ways to collect a sample. You can catch the stool on plastic wrap that is loosely placed over the toilet bowl and held in place by the toilet seat, and then place the sample in a clean container. (One test kit supplies a special toilet tissue that you use to collect the sample.) Do not take stool samples from the toilet bowl water, because this can cause errors. If you need to collect a sample from a child still in diapers, line the diaper with plastic wrap. Position the plastic wrap so that it keeps the stool from any urine. Mixing of urine and stool can spoil a good sample. Your health care provider will give you instructions on when and how to retu...
I'm sure you have had it happen to you at some time in your life. You buy a ring, a necklace, a bracelet simply because you like it. The next day you look down and you have a green ring where the jewelry is. Why does this happen? What causes your skin to turn green when you wear certain jewelry but not others?
Acidity in Your Skin
Metals in the ring or other jewelry can react with the acidity in your skin. The higher the acidity level, the quicker this reaction may happen. Heat and humidity or sweating also increase the reaction. According to Discovery.com, the acids in your skin cause copper in the jewelry to begin to corrode, forming a salt compound. These salts are green and when they are absorbed in the skin, your skin turns green.
Is it an Allergy?
Allergic reactions to metal include redness, swelling and itching. If you are not experiencing any of these but simply have a green area where the jewelry touches your skin, it is not an allergic reaction.
The stool guaiac test finds hidden (occult) blood in the stool (bowel movement), even when you cannot see the blood yourself.
It is the most common form of fecal occult blood test (FOBT) in use today.
Guaiac smear test; Fecal occult blood test - guaiac smear; Stool occult blood test - guaiac smear
How the test is performed
In the most common way of doing a stool guaiac test, a small sample of stool is placed on a paper card and a drop or two of testing solution is added. A color change is a sign of blood in the stool.
If the test is performed in an office or hospital, a doctor may collect a small amount of stool during a rectal examination.
If the test is performed at home:
You will need to collect a stool sample from three bowel movements, one right after the other.
You will then smear a small amount of stool on a card, and mail it to a laboratory for testing.
There are many ways to collect the sam...
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