Dengue haemorrhagic fever is diagnosed by -
<p> Dengue hemorrhagic fever is diagnosed by acute onset of fever ,hemorrhagic manifestation (e.g.positive tourniquet test),platelet count <100,000 cells/mm3. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:250. <\p>
Communicable diseases
Acute onset of high fever, presence of petechiae, epistaxis platelet count>2 lakh
Acute onset of high fever, positive tourniquest test, epistaxis ormalena and malena and platelet count>1.5lakh
Acute onset high fever 2 to 7 days, associated with hemorrhagic manifestation e.g hemoptysis and platelet count less than 1.5lakh
Acute onset of high fever, positive tourniquet test, bleeding gum and platelet count less than 1.0lakh
Acute onset of high fever, positive tourniquet test, bleeding gum and platelet count less than 1.0lakh