Thursday, July 1, 2010


The map above shows the distribution of a disease in 2006. There are many different presentations of this disease including asymptomatic infection. Those with symptoms often have an incubation period of 3-14 days before presenting with fever of 5-7 days, fatigue, headache, retroorbital pain, myalgias and arthralgias. Children sometimes present with GI or respiratory tract symptoms. Labs often show leukopenia, thrombocytopenia, and elevated AST.

The dreaded presentation, however, includes shock, hemoconcentration, marked thrombocytopenia, abdominal pain, vomiting, fever of 2-7 days, and spontaneous bleeding. If you inflate a blood pressure cuff on these patients between the systolic and diastolic pressures for 5 minutes, you'll find petechiae.

Challenge: What's the disease?

Image is in the public domain.


arif said...

this is Dengue hemorrhagic fever

tree said...

Dengue fever

Ryan said...

Dengue Fever

Suheil said...

Dengue fever..... welcome to India:) the vector for this is Aedes aegypti.... the dreaded complication is dengue shock syndrome/ dengue haemorrhagic fever.

Craig Chen said...

exactly guys know your travel medicine. good recognition of the mosquito species!

Dengue is the most prevalent mosquito-borne disease (Aedes aegypti). As noted, presentations vary and include the dreaded dengue hemorrhagic fever which has a positive tourniquet test and marked vascular permeability. The myalgias and arthralgias give the nickname "break-bone fever."

Sources: UpToDate; Wikipedia.