US EditionUS Confirms First Travel-Linked Human Screwworm Case in Maryland
- In 2025, Maryland confirmed an infection of the New World screwworm parasite in an individual who had recently traveled from Guatemala and received medical treatment within the state.
- The case arose amid a screwworm outbreak that has been intensifying since late 2023 across regions in southern Mexico and countries to its south, leading to heightened alertness in the United States.
- US state veterinarians learned of the Maryland case last week during a CDC call, while prevention measures were promptly implemented in the state.
- In 2025, USDA Secretary Brooke Rollins revealed intentions to establish a facility in Texas dedicated to producing sterile flies as a measure against the pest, which poses a potential economic threat of $1.8 billion to the state's livestock industry if left unchecked.
- This detection challenges US efforts to keep screwworm eradicated since the 1960s and may impact the cattle industry amid record-high market prices and border controls.
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Authorities say myiasis caused by the New World screwworm parasite was discovered in a patient who returned to the U.S. from El Salvador.
The United States has confirmed the first case of human infection with "flesh-eating maggots." The disease is currently under treatment and under investigation. The public health ministry emphasized that the risk to the public is very low, but that if it spreads to livestock, it could cause economic losses exceeding 100 billion dollars.
What is New World screwworm, the flesh-eating parasite detected in the US?
The United States has confirmed its first human case of infection caused by the New World screwworm. New World screwworm is a flesh-eating parasitic fly that was eradicated from the country decades ago. The case was detected in a Maryland resident who had recently returned from El Salvador, where the parasite remains present. Health officials have stressed that the patient has fully recovered and there is no evidence of spread within the U.S. Th…
First human case of screwworm adds to concerns over livestock and beef costs
COLUMBIA, Mo. (KMIZ) The first reported case of a flesh-eating parasite in a human was confirmed by the U.S Department of Health and Human Services on Monday. The Maryland resident who was diagnosed has recovered from the infection. According to HHS, a person who traveled to El Salvador was diagnosed with New World screwworm, a species of parasitic flies that feed on live tissue. The fly gets its name from the way that maggots screw themselves…
First U.S. screwworm case in years confirmed in Maryland
Click in for more news from The Hill {beacon} Health Care Health Care The Big Story First U.S. screwworm case in years confirmed in Maryland Federal officials in the U.S. have found the first human case of the flesh-eating parasite New World Screwworm connected to ongoing outbreaks in Central America. © Photo credit The…
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