First locally acquired human case of dengue virus reported in San Bernardino County

The San Bernardino County Department of Public Health has confirmed the county’s first locally acquired human case of the mosquito-borne illness dengue in the city of San Bernardino. Most dengue cases typically seen in the county are associated with travel to areas where the virus is more common.

Dengue virus is typically spread when a person is bitten by an infected Aedes mosquito. When a mosquito bites someone who has dengue virus in their blood, the mosquito itself becomes infected and can later transmit the virus to healthy individuals through future bites. While most individuals will not experience symptoms, those bitten by an infected mosquito may develop dengue fever and experience aches and pain (such as eye pain, typically behind the eyes, muscle, joint, or bone pain), nausea, vomiting and a rash.

Most symptoms last about a week, with full recovery usually occurring within two weeks. If you have been bitten by a mosquito and are experiencing these symptoms, contact your medical care provider.

“Dengue can cause a serious illness in humans; therefore, I urge residents to take precautions to protect themselves against mosquito bites,” said San Bernardino County Health Officer Michael A. Sequeira, M.D.

Although fall brings relief from excessive heat, mosquitoes are still active. Residents can protect themselves from dengue and other mosquito-borne illnesses by following these tips:

Dump, drain and scrub any containers holding water in and around your home. Aedes mosquito eggs have been found in plant saucers, seldom used dishwashers, lawn drains, recycling and pet water dishes. Scrubbing is necessary to remove any eggs attached to the surface.
Dress appropriately when outdoors – Wear socks, shoes, long pants and long-sleeved shirts that are loose-fitting and light colored.
Apply insect repellent – Check that your insect repellent contains DEET, Picaridin, IR3535 or oil of lemon eucalyptus and apply it according to the manufacturer’s directions.
Doors – Make sure doors and windows have tight-fitting screens. Repair or replace screens that have tears or holes to prevent mosquitoes from entering your home.

To learn more about dengue, please visit bit.ly/CDPHdengue. For more information on mosquito prevention, contact the San Bernardino County Department of Public Health Environmental Health Services at 1-800-442-2283 or visit ehs.sbcounty.gov.

Additional County Update News – November 7, 2024