A stool test
is one where fecal matter is collected for analysis to diagnose the presence or absence of a medical condition.
Fecal occult blood test
One of the most common stool tests, the Fecal occult blood test
can be used to diagnose many conditions that cause in bleeding in the gastrointestinal system
including Colorectal cancer
or Stomach cancer
Parasitic diseases such as Ascariasis
can be diagnosed by examining stools under a microscope for the presence of worm larvae or eggs. Some bacterial diseases can be detected with a stool culture. Toxins from bacteria such as Clostridium difficile
('C. diff.') can also be identified. Viruses such as rotavirus
can also be found in stools.
A fecal pH test
may be used determine lactose intolerance
or the presence of an infection. Steatorrhea
can be diagnosed using a Fecal fat
test that checks for the malabsorption of fat.