Thelazia callipaeda Eyeworms in American Black Bear, Pennsylvania, USA, 2023

Abstract

We identified a Thelazia callipaeda eyeworm in an American black bear in Pennsylvania, USA, on the basis of its morphological features and molecular analysis. Our finding highlights emergence of a T. callipaeda worm sylvatic transmission cycle in the United States.

Keywords

• Thelazia callipaeda
• eyeworm
• emerging disease
• thelaziosis
• wildlife
• parasites