Tropical Parasite Spreading and Causing Skin Infections in US, CDC Reports

Sand flies, tiny tan flies about a quarter of the size of mosquitoes, are spreading a tropical parasite called leishmaniasis in the United States. The CDC has detected leishmaniasis in tissue samples from patients who have not traveled outside the country, indicating local transmission. The skin infections caused by leishmaniasis start with a small bump that turns into ulcerous sores. While most cases are asymptomatic, the sores can scar and be disfiguring, especially if they occur on the face. Sand flies capable of carrying the parasite have been expanding their range due to climate change, and they can now be found in several southern and southwestern states. Precautions such as using bug sprays and seeking treatment for persistent skin sores are recommended.