The KOH preparation test is used to
find out whether oral candidiasis (thrush) is
present in a person's mouth. A sample of skin is taken from the person's mouth
by lightly scraping the white patches.
The sample is then placed
on a slide with potassium hydroxide (KOH) solution and gently heated. This
solution slowly dissolves the skin cells but not the yeast cells. The yeast
cells can then be seen with a microscope. Color stains may be used so that the
yeast cells are easier to see.
Q. I'm waking up every morning with little bites on my arms. Could
these be from bedbugs?
A. They certainly could be. Bedbugs -- small, oval-shaped, wingless
insects that feed on the blood of mammals (including humans) -- are making a
big comeback all over the country. Bedbugs get their name from the fact that
they often hide in mattresses during the day -- after feasting on sleeping
people at night.
Unlike ticks and fleas, bedbugs don't carry diseases. But the itching can be