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What are the criteria for dengue hemorrhagic fever?
- Fever lasting 2-7 days
- May be biphasic
- Hemorrhagic tendencies
- Positive tourniquet (aka Rumpel-Leede) test
- Petechiae, ecchymosis or purpura
- GI bleeding
- Thrombocytopenia (<100,000/mm3)
- Evidence of plasma leakage
- Increase in hematocrit >20% above age/sex normal
- Decrease in hematocrit >20% after volume replacement
- Signs of plasma leakage
- e.g. pleural effusions, ascites, hypoproteinemia
References
http://www.cdc.gov/dengue/clinicalLab/caseDef.html