Dengue fever laboratory tests

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Laboratory Findings

Electrolyte and Biomarker Studies

Serology and PCR (polymerase chain reaction) studies are available to confirm the diagnosis of dengue if clinically indicated.

Platelet Count

The platelet count will drop until the patient's temperature is normal.

Hematocrit

• In the presence of GI bleeding, the hematocrit can drop.
• In the presence of severe dehydration, the hematocrit may rise (hemoconcentration).