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
1.0 mL Serum from a Red Top Tube in a Plastic Vial
7 days Ambient
14 days Refrigerated
30 days Frozen
0.25 mL Serum
Negative
Limitations False-positive results have been observed in patients with ulcerative colitis.
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
2 to 3 days
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