A New Case of Human Infection by the New World Screwworm Has Been Confirmed in the USA

• The first case of human infection by the new world screwworm has been confirmed in the USA.
• Screwworm larvae can cause serious complications if left untreated.
• The risk of infection right now is low, but vigilance is necessary.

A case of human infection by the new world screwworm has been confirmed in the USA, as reported by representatives of the Department of Health and the Centers for Disease Control and Prevention. The case was registered in a resident of Maryland, who recently returned from El Salvador. The patient is already recovering, and monitoring programs have not detected any other infected screwworms in neighboring areas, so the threat level remains minimal.

What is the new world screwworm?

The new world screwworm, known as Cochliomyia hominivorax, is a type of parasitic fly that lives on living tissue and can cause myiasis. The larvae can infest various types of livestock, including domestic and wild animals. They lay eggs on open wounds, and the larvae, as they develop, penetrate into the tissue and cause damage.

Symptoms of infection and treatment

Infection with the new world screwworm can manifest with symptoms such as wounds that do not heal, pain, bleeding from wounds, and the presence of larvae in the wounds. Treatment involves the physical removal of the larvae by a healthcare professional, as there are no specific medications approved for combating this infestation.

History of new world screwworms in the USA

This species was present in the USA until the 1960s, when a campaign began for its eradication. While cases of human infection were rare, the impact on rural agriculture was significant. Since 2023, there has been a resurgence of screwworm populations in the northern regions through Central America and Mexico.

Is the risk increasing?

Currently, the risk of infection in the USA remains low. However, this case highlights the importance of monitoring and prevention, especially in the context of globalization and climate change.

Tags: USA