Dengue is a virus transmitted by the bite of an infected
mosquito. It has been found in many parts of the world,
including recently the Caribbean, South and Central America, and
What are the signs and symptoms of dengue?
Symptoms of dengue include high fever, severe headache, eye pain,
joint pain, muscle pain, rash, and mild bleeding. A more severe
form of the disease, dengue hemorrhagic fever, has similar
symptoms that are followed by vomiting, severe abdominal pain,
and difficulty breathing.
How can I get dengue?
Dengue is spread through the bite of an infected mosquito. It
cannot be transmitted directly from person to person.
Can I get dengue in San Mateo County?
Dengue is not currently present among mosquitoes in San Mateo
County. However, a species of mosquito capable of transmitting
dengue, Aedes aegypti, has been found in San Mateo County
recently. Local mosquitoes could become infected by feeding on
someone with an active case of dengue. For this reason, the
District works closely with the County Health Department on all
mosquito-borne disease cases. When a mosquito-borne
disease is detected in a patient in San Mateo County, the
health department notifies the District. District staff will then
conduct mosquito surveillance in the area to ensure that vector
mosquitoes are kept at very low numbers.
What can I do if I am traveling to a country where dengue
There is currently no vaccine or medication to prevent infection
with dengue. Travelers are advised to avoid mosquito bites. For
information on protecting yourself from mosquito bites, see
What You Can Do: