"Tropical Parasite Spreading Skin Infections in US, Experts Warn"

Sand flies, tiny tan flies found in warm, rural areas, are capable of transmitting a parasite called Leishmania, causing an infectious disease called leishmaniasis. The U.S. Centers for Disease Control and Prevention (CDC) has detected cases of leishmaniasis in tissue samples from patients who have not traveled outside the United States, indicating local transmission. The disease starts with a small bump that erupts into ulcerous sores, often near the site of a sand fly bite. While most cases are asymptomatic, symptomatic individuals may develop painful ulcers that can scar and disfigure. Leishmaniasis can also infect internal organs and is fatal if left untreated. Sand flies have been expanding their range due to climate change, and precautions such as using bug sprays and seeking treatment for persistent skin sores are recommended.