Invasive anisakiasis. A case report from Hawaii.

A confirmed case of penetration into the stomach wall by an anisakine nematode, to our knowledge the first in the United States, is reported. A viable third-stage larva of Anisakis simplex was removed from a woman in Hawaii who had eaten fresh, raw salmon. A serodiagnostic test showed the serum of the patient to be positive for A. simplex-specific IgE at days 11 and 60 postinfection. Our results indicate that eating fresh, raw salmon exposes consumers to a significant health risk.