A Rare Threat Returns: New World Screwworm Detected in Texas Calf
The resurgence of a notorious pest has alarmed agricultural authorities, as the New World screwworm has been identified in a Texas calf. This flesh-eating fly, eradicated from the United States since the 1960s, now threatens the cattle industry once more.
For the first time in six decades, the New World screwworm has reappeared on American soil, infecting a calf in Texas. NPR’s Pien Huang provides insight into the potential impact of this dangerous insect on cattle farmers.
Government Response and Concerns
Reacting swiftly to the news, the U.S. Department of Agriculture (USDA) has mobilized a unified incident command team. Secretary Brooke Rollins, during a media call, emphasized their immediate actions: establishing a 20-kilometer control area around the infestation site.
The USDA’s quick response came after several years of tracking the screwworm fly’s migration northward from South America. Secretary Rollins elaborated, “The fly doesn’t fly itself – or, I should say, herself – long distances.” Instead, the larvae and flies travel with cattle across borders, eventually reaching the United States.
Local Impact and Historical Context
The infected calf, discovered on a ranch in Zavala County, Texas, had larvae in an umbilical lesion, as explained by Bud Dinges from the Texas Animal Health Commission. Zavala County is located approximately 60 miles from the U.S.-Mexico border, making it a critical point of concern.
Rear Admiral Michael Schmoyer of the USDA reassured the public that the situation is currently contained, stating, “I want to emphasize that there is only one infested animal. It is that 3-week-old beef calf. It is not a danger to the food supply.”
The New World screwworm, which consumes living tissue, was a significant threat to livestock until eradication efforts in the 1960s, primarily through the release of sterile flies. These flies mate without producing offspring, effectively reducing the screwworm population.
Ongoing Measures and Vigilance
Today, the USDA continues to implement the sterile fly release strategy, dispersing two million flies twice weekly, equating to four million flies per week. Additionally, ranchers are urged to inspect their cattle for signs of infestation.
In a bid to bolster these efforts, the U.S. plans to establish a new sterile fly factory in Texas next year, ensuring continued protection against this pest.
For more details, visit NPR.
This article was originally written by www.npr.org
