Fecal Occult Blood Test Positive Negative Results

What Does Fecal Occult Blood Test Mean and How accurate are the FOBT results to Detect Colon cancers from other bleeding sources.

Fecal occult blood (FOB) refers to blood in the feces that is not visibly apparent (unlike other types of blood in stool such as melena or hematochezia). A fecal occult blood test (FOBT) checks for hidden (occult) blood in the stool (feces).

Positive Fecal Occult Blood Test Meaning

For the guaiac-based FOBT, a positive fecal occult blood test result indicates that abnormal bleeding is occurring somewhere in the digestive tract. This blood loss could be due to:

  • ulcers,
  • diverticulosis,
  • polyps,
  • inflammatory bowel disease,
  • hemorrhoids,
  • blood swallowed due to bleeding gums or nosebleeds,
  • Benign or cancerous tumors.

Negative FOBT Results Meaning

A fecal occult blood test is considered negative if no blood is detected in your stool samples. If you had the test to screen for colon cancer and you’re at average risk — you have no colon cancer risk factors other than age — your doctor may recommend waiting one year and then repeating the test. Positive result.


One test called (stool DNA, or sDNA), This test looks for blood and abnormal DNA in the stool that may indicate the presence of colon cancer. If the test is positive, you will need a colonoscopy to remove any cancer or polyps. The high-sensitivity fecal occult blood tests FOBT, include the sensitive guaiac test and FIT.

Occult blood in the stool may indicate colon cancer or polyps in the colon or rectum — though not all cancers or polyps bleed. Typically, occult blood is passed in such small amounts that it can be detected only through the chemicals used in a fecal occult blood test. What can Liquid Bloody Stool detect?

Faecal Occult Blood Test (FOBT) Results. A positive FOBT result does not necessarily mean you have cancer. FOBTs do not detect cancer. … The presence of blood may be due to conditions other than cancer, such as polyps, haemorrhoids, or inflammation of the bowel,but the cause of the bleeding needs to be investigated.

Test Procedures for Medical Labs

after performing hand hygiene and
ensuring privacy introduce yourself to
the patient then identify her using two
identifiers coming your name and
birthday hillary Connor 11 27 53 okay
so I need to get a stool sample from use
in the morning okay
so over here on the bedside commode I
have a hat in there to collect the
sample so it doesn't push your call
light and let me know whenever you have
a sample ready that'd be great okay okay
I'll be back all right to perform a
fecal occult blood test begin by
applying clean gloves open the flap of
the hemoccult slide use the tip of a
wooden applicator to obtain a small
specimen and apply a thin smear of the
specimen to the paper in the first box
obtain a second specimen from a
different portion of the stool and apply
a thin smear to the second box on the
slide close the cover and turn the slide
over this will allow the developing
solution to penetrate the fecal specimen
when you apply it open the cardboard
flap and apply two drops of hemoccult
developing solution to each box
then add one drop of solution to the
verifying area on the testing package
wait 30 to 60 seconds and check the
slide for color change a bluish
discoloration is said to be guaiac
positive indicating the presence of a
cold blood the test is considered to be
negative indicating that no blood is
present in the sample
if the guaiac paper does not change
color when you are finished reading the
test results wrap the slide and the
wooden applicator in a paper towel
remove your gloves making sure to pull
the glove over the supplies then dispose
of them in the proper receptacles and
perform hand hygiene as part of your
follow-up care record the results of the
test including a description of the
stool characteristics report a positive
test result to the patient's health care
provider. Remember, Blood in urine meaning

At Home FOB Test

Dr.Megan Ralf

A Medical laboratory Scientist who devoted his life to medical and laboratory sciences, writes his everyday expertise dealing with various pathological conditions through laboratory diagnosis of different body fluids, also participating in many workshops for first aids, infection control, and urgent care. Also Dr Megan Ralf coaching many medical teams.

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