A definitive diagnosis can be made in a Trichinella infection on the basis of which of the following findings?
a. Presence of adult worms in the feces
b. Identification of encysted larvae through muscle biopsy
c. Presence of cutaneous larvae migrans in the skin
d. Identification of unembryonated eggs in the feces
B
Diagnosis may be difficult because the symptoms may resemble a variety of influenza-like ill-nesses. A thorough patient history is required to assist the physician in diagnosing the condition in a timely fashion. The identification of the encysted larvae through muscle biopsy provides a definitive diagnosis. However, based on the locations of the larvae, some tissues may be difficult to access; therefore the condition may not be diagnosed until the postmortem examination.
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