Specimen:

Serum

Collection Medium:

Minimum:

Preferred Minimum:  1 mL serum
Absolute Minimum:  0.25 mL serum

Analytic Time:

7-10 days

Reference Range:

E. histolytica Ab IgG index value
<0.90 NEGATIVE
0.90-1.10 EQUIVOCAL
>1.10 POSITIVE

Comments:

Serologic studies may be helpful in the diagnosis of invasive 
intestinal and extra-intestinal amebiasis.  Asymptomatic cyst passers 
usually have negative serologic tests.  Eighty-five percent of patients 
with biopsy proven invasive intestinal amebiasis are antibody positive 
whereas 95-100% of patients with extra intestinal amebiasis are 
positive.  Values may remain elevated 6 to 18 months following invasive 
disease.

Methodology:

Enzyme Linked Immuosorbent Immunoassay(ELISA)

CPT Code:

86753