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Sensitivity of Tests for the Diagnosis of Intestinal and Extraintestinal Amebiasis*
| Test | Colitis | Liver Abscess |
|---|---|---|
| Microscopy | ||
| Stool | 25–60% | 10–40% |
| Abscess fluid | NA | < 20 |
| Antigen detection | ||
| Stool | 90% | 40% |
| Serum | 65% (early) | 100% (before treatment) |
| Abscess fluid | NA | 40% |
| Indirect hemagglutination (Ab) | ||
| Acute serum | 70% | 70–80% |
| Convalescent serum | > 90% | > 90% |
Reprinted with permission from Haque R, Huston C, Hughes M, et al. Current concepts: amebiasis. N Engl J Med 2003:348:1565–1573.
