Article: Evaluating eosinophilia in the primary care setting: don't rely on specialists to do the tests that you should do before your patient is referred. Eosinophilia can accompany many and varied signs and symptoms, but assessment always begins with basic testing.(physician assistants)

Approximately 30 diseases are capable of causing an eosinophilia of greater than 600/[micro]L of blood. Some of these diseases are relatively common and within the realm of primary care evaluation, while others are rare and difficult to diagnose without referral to a specialist. Because of this variability and to avoid unnecessary tests, excessive health care costs, and treatment delays, a systematic approach to the workup of eosinophilia is necessary (see the algorithm, page 37). The following case illustrates this point and reminds PAs that specialists cannot be relied upon to repeat basic tests that should have been performed at the primary care level before referral.

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