The re-emergence of the New World Screwworm in the Americas poses a serious threat to livestock, wildlife, and regional economies. After years of eradication efforts, this invasive pest is making a concerning comeback, prompting urgent responses from authorities. Curious about how this parasite spreads, its impact, and what’s being done to control it? Keep reading to find out everything you need to know about this emerging threat.
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What exactly is the screwworm and why is it dangerous?
The screwworm is caused by the Cochliomyia hominivorax fly, whose larvae feed on living tissue, causing severe tissue damage and infections in livestock and wildlife. It’s dangerous because it can quickly infest wounds, leading to pain, illness, and even death if not treated promptly.
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How is the screwworm spreading in the Americas?
After being eradicated from parts of the US and Central America, the screwworm has started reappearing in regions like Colombia and Mexico. The spread is mainly due to livestock movements, breaches in biosecurity, and natural migration, with the parasite expanding northward into new territories.
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What measures are the US and Mexico taking to fight the screwworm?
Both countries are deploying advanced control strategies, including sterile fly releases and synthetic bait traps. Texas has introduced a synthetic fly lure to combat the infestation, while Mexico faces export bans on cattle to prevent further spread. These efforts aim to contain and eradicate the pest before it causes widespread damage.
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What impact does the screwworm have on livestock and the economy?
The screwworm infests livestock, leading to costly treatments, reduced productivity, and in severe cases, death of animals. This impacts farmers’ livelihoods and can cause significant economic losses, especially in regions heavily dependent on cattle ranching and livestock exports.
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Are there new methods to control or prevent the spread of screwworms?
Yes, recent innovations include the use of sterile insect techniques, synthetic bait traps, and biological control methods. These strategies aim to reduce wild populations of the fly and prevent new infestations, helping to protect both livestock and wildlife.