US screwworm cases rise as outbreak spreads beyond initial contamination zones
Summary
Screwworm infections in animals are increasing in the US, mainly in Texas and New Mexico, after the parasite was first found in June. US agricultural officials are working to control the outbreak using sterile flies and other methods to protect livestock and the beef industry.Key Facts
- Twelve screwworm cases have been confirmed so far, mostly in Texas counties and one in New Mexico.
- The screwworm is a parasite that feeds on living tissue in warm-blooded animals' wounds.
- This parasite was almost eradicated in the US in the 1970s but has recently reappeared.
- The infected animals include cattle, goats, sheep, and one dog.
- The USDA advises animal owners to watch for wounds with maggots or unusual signs and report suspected cases quickly.
- The US government released millions of sterile flies to reduce the screwworm population.
- Pennsylvania has placed restrictions on livestock imports from affected areas to prevent the spread.
- Despite the outbreak, US food remains safe because the screwworm does not infest meat or produce.
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