Stool FEME (Microscopy)
Stool FEME is useful for the detection and identification of some parasites eg. protozoa, eggs, larvae and worms. A positive result indicates the presence of the parasite but does not necessarily indicate that it is the cause of any symptoms. Some strains of protozoa are nonpathogenic and cause little or no illness. Cautions: Examination of a minimum of three specimens is required for the detection of >90% of some protozoal infections especially giardiasis.
Stool OB (Occult Blood)
Stool occult blood is used for the detection of blood in the stool from whatever cause whether benign or malignant. The presence of occult blood indicates bleeding from the guts, however, certain foods such as red meat, turnip and cauliflower are known to cause a false positive result. Patients should be advised not to eat red meat for 3 days before collecting specimens. Piles (hemorrhoids) may also give a false positive result.
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