Flesh-eating screwworm is confirmed in the U.S., officials say

Flesh-eating screwworm is confirmed in the U.S., officials say

## **Parasitic Threat Re-emerges: Screwworm Infestation Detected in United States**

**Washington D.C.** – Federal and state agricultural authorities have confirmed the presence of the New World screwworm, a destructive parasitic fly, within the United States, marking a significant concern for livestock health and agricultural economies. The detection, the first in decades, has triggered immediate containment and eradication efforts by the U.S. Department of Agriculture (USDA) and collaborating state agencies.

The screwworm, scientifically known as *Cochliomyia hominivorax*, poses a severe threat to warm-blooded animals, including cattle, sheep, goats, and even humans. The female fly lays eggs in open wounds of living animals, and the hatching larvae burrow into the flesh, feeding on the host’s tissue. This infestation can lead to severe tissue damage, secondary infections, and, if left untreated, can be fatal.

Officials confirmed the initial detection in a small number of domestic animals in Florida. While the exact pathway of introduction is still under investigation, the USDA has emphasized that the risk to the general public is considered low, as the parasite primarily targets animal wounds. However, vigilance is being urged among livestock owners and veterinarians across the southeastern United States.

In response to the confirmed outbreak, the USDA’s Animal and Plant Health Inspection Service (APHIS) has mobilized a comprehensive response strategy. This includes intensified surveillance in affected areas, the establishment of quarantine zones, and the deployment of sterile insect technique (SIT) facilities. SIT involves the mass rearing of male screwworm flies, sterilizing them with radiation, and then releasing them into the environment. These sterile males then mate with wild females, preventing the production of fertile eggs and ultimately leading to the eradication of the pest population.

“The re-emergence of the screwworm is a serious development that requires a swift and coordinated response,” stated a spokesperson for APHIS. “Our priority is to protect the health of our nation’s livestock and prevent the spread of this parasite. We are working closely with our state partners to implement robust containment and eradication measures.”

The history of screwworm in the United States is one of successful eradication. Through extensive application of the sterile insect technique, the pest was eliminated from the U.S. by 1966. Its reappearance underscores the persistent threat posed by transboundary animal diseases and the importance of ongoing biosecurity measures.

Livestock producers are being advised to remain vigilant for any signs of screwworm infestation, which typically include maggot presence in wounds, animal distress, and potential swelling around the wound site. Prompt reporting of any suspected cases to local veterinarians or state animal health officials is crucial for early detection and intervention.

The economic implications of a widespread screwworm infestation could be substantial, impacting the multi-billion dollar livestock industry through animal losses, treatment costs, and trade restrictions. The current efforts are focused on containing the outbreak to its current localized area and achieving eradication as quickly as possible. Authorities are optimistic that with the established protocols and public cooperation, the screwworm can once again be brought under control. The USDA is committed to providing regular updates on the situation and the progress of eradication efforts.

This article was created based on information from various sources and rewritten for clarity and originality.