THIS IS A URINE TEST THAT IS PERFORMED AT A LABCORP PATIENT SERVICE CENTER NEAR YOU.
Urine: For suspected Schistosoma haematobium, collect urine sample without preservatives at mid-day.
"Schistosomes are trematode worms that live in the bloodstream of human beings and animals. Three species (Schistosoma haematobium, S. mansoni and S. japonicum) account for the majority of human infections. People are infected by exposure to water containing the infective larvae (cercariae). The worms mature in the veins that drain the bladder (S. haematobium) or in the intestine (other species). The adults do not multiply in the body but live there for several years, producing eggs. Some eggs leave the body in the urine or faeces and hatch in water to liberate the miracidium larva, which infects certain types of freshwater snails. Within the snail, the parasites multiply asexually to produce free-swimming cercaria larvae, which infect people by skin penetration. Eggs remaining in the human body are trapped in the tissues, where they elicit hypersensitivity granulomas that cause disease in the urogenital system (S. haematobium) or in the liver and intestines (other species).
The diagnosis of infection with Schistosoma is based on simple qualitative and quantitative examinations of faeces and urine. S. haematobium infection is identified on the basis of a history of haematuria, observation of gross haematuria, detection of haematuria by chemical reagent strips or detection of eggs in urine by microscopy. S. mansoni and S. japonicum infections are identified by the presence of eggs in faeces. All infections can be quantified by egg counts in urine (S. haematobium) and faeces (other species). The available immunodiagnostic tests are useful for detecting light infections. Absence of infection can be established with certainty only by use of a combination of diagnostic tests." Reference: http://www.inchem.org/documents/iarc/vol61/m61-1.html
Test Includes: Concentration of material and examination of specimen for ova and parasites by conventional iodine/saline and trichrome staining. This will not detect Cryptosporidium, Cyclospora cayetanensis, or Microsporidium.
Limitations: One negative result does not rule out the possibility of parasitic infestation. Stool examination for Giardia may be negative in early stages of infection, in patients who shed organisms cyclically, and in chronic infections. The sensitivity of microscopic methods for the detection of Giardia range from 46% to 95%. Tests for Giardia antigen may have a higher yield.
Contraindications: Administration of barium, bismuth, Metamucil®, castor oil, mineral oil, tetracycline therapy, administration of antiamebic drugs within one week prior to test. Purgation contraindicated for pregnancy, ulcerative colitis, cardiovascular disease, child younger than five years of age, appendicitis or possible appendicitis.
A LABCORP REQUISITION FORM WILL BE PROVIDED AT CHECK-OUT. BRING THAT FORM TO A LABCORP PATIENT SERVICE CENTER.