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The first human screwworm case in the U.S. has been traced to a person in Maryland who traveled from Guatemala.
The parasite — the larvae of the new world screwworm fly — can devastate cattle herds and is rife in parts of Central America ...
The U.S. Department of Health and Human Services on Sunday reported a human New World screwworm (NWS) case.
The patient with the first human infestation of travel-associated New World screwworm in the United States has recovered from ...
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