Health
First U.S. Human Case of Flesh-Eating Parasite Identified
Health Points
- The first human case of new world screwworm in the U.S. has been confirmed in Maryland after recent travel to El Salvador.
- The parasite’s larvae can burrow into the flesh of warm-blooded animals through open wounds, causing serious health risks.
- Officials state the risk to the U.S. public remains very low, but preventive measures are being put in place to protect animals and humans.
The U.S. Department of Health and Human Services has confirmed a rare parasitic infection in a Maryland resident who had traveled to El Salvador.
The individual was diagnosed with new world screwworm after both national and state health agencies evaluated the patient.
This parasite, a type of fly, can cause severe damage to livestock, pets, and even humans when larvae enter the body through wounds.
“This is the first human case of travel-associated New World screwworm myiasis from an outbreak-affected country identified in the United States,” said HHS spokesperson Emily G. Hilliard.
The screwworm is most commonly found in Cuba, Haiti, the Dominican Republic, and throughout South America.
While outbreaks were previously controlled decades ago, the parasite’s presence has been growing in regions closer to the U.S. border.
Health officials report there have been no recent animal cases in the U.S., but they are prepared with new plans, including emergency animal drug authorizations and breeding sterile male flies as a control method.
“The potential future threat to animal populations and the food supply chain requires proactive action,” stated HHS representatives.
This approach was previously used during a 1960s U.S. outbreak with positive results.
The new world screwworm lays eggs in wounds, and larvae can cause significant tissue damage, even from small injuries.
People most at risk are those with open wounds, those working with animals, or travelers to areas where the fly is established.
Warning signs include wounds that do not heal, bleeding, noticing larvae or maggots, and a strong odor from affected areas.
Immediate medical care is needed to remove the larvae, and both health providers and veterinarians should report suspected cases promptly.
Stay proactive about your health by covering wounds and seeking medical help if you notice unusual symptoms following international travel.