<prompt> All are features of dengue hemorrhagic fever expect:ThrombocytopeniaNarrow pulse pressureHematocrit elevatedPositive torniquet test.  <response>: 1. Criteria for diagnosis of dengue hemorrhagic fever DHF: o Fever - acute, high, continuous for 2-7 days. o Positive tourniquet test o Enlargement of liver o Laboratory evidence o Thrombocytopenia 1000,000mm3 o Haemoconcentration Haematocrit raised by 20 Narrow pulse pressure is not seen in DHF 