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NOTE: A surveillance case definition is a set of uniform criteria used to define a disease for public health surveillance. Surveillance case definitions enable public health officials to classify and count cases consistently across reporting jurisdictions. Surveillance case definitions are not intended to be used by healthcare providers for making a clinical diagnosis or determining how to meet an individual patient’s health needs.

Subtype(s)

  • Dengue virus infections
  • Dengue fever
  • Dengue shock syndrome

Clinical Description

Dengue hemorrhagic fever (DHF) is characterized by all of the following:

  • Fever lasting from 2-7 days
  • Evidence of hemorrhagic manifestation or a positive tourniquet test
  • Thrombocytopenia (≤100,000 cells per mm3)
  • Evidence of plasma leakage shown by hemoconcentration (an increase in hematocrit ≥20% above average for age or a decrease in hematocrit ≥20% of baseline following fluid replacement therapy), OR pleural effusion, or ascites or hypoproteinemia.

Subtype(s) Case Definition

Related Case Definition(s)