Entamoeba histolytica, IgG
Infectious Disease Laboratories:Immunology
Gold top SST (serum separator tube, no anticoagulant)
2.5 mL (minimum 0.5 mL)
Cause for rejection:
Contaminated, heat inactivated or severely lipemic specimens.
Sent to reference lab
Enzyme-Linked Immunosorbent Assay (ELISA)
Acute and convalescent specimens must be labeled as such; parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens.
Clinical information: Aid in the detection of amebic liver abscess. Test is not useful for intestinal infection. In case of extra-intestinal complications, a positive antibody can indicate amebiasis even though stool findings are negative. Seroconversion between acute and convalescent sera is considered strong evidence of recent infection.
Negative: No significant level of detectable E. histoytica IgG Antibody: 8 U or less.
Equivocal: (repeat testing in 10-14 days may be helpful) 9-11 U
Positive: (current or past infection) 12 U or greater