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Trichinellosis / Trichinosis (Trichinella spp.)
1996 Case Definition

CSTE Position Statement(s)

  • 09-ID-64

Clinical Description

A disease caused by ingestion of Trichinella larvae. The disease has variable clinical manifestations. Common signs and symptoms among symptomatic persons include eosinophilia, fever, myalgia, and periorbital edema.

Laboratory Criteria for Diagnosis

  • Demonstration of Trichinella larvae in tissue obtained by muscle biopsy, OR
  • Positive serologic test for Trichinella

Case Classification


A clinically compatible case that is laboratory confirmed


In an outbreak setting, at least one case must be laboratory confirmed. Associated cases should be reported as confirmed if the patient shared an epidemiologically implicated meal or ate an epidemiologically implicated meat product and has either a positive serologic test for trichinosis or a clinically compatible illness.

The 1996 case definition appearing on this page was re-published in the 2009 CSTE position statement 09-ID-64. Thus, the 1996 and 2010 versions of the case definition are identical.