Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Gravid female (left) demonstrating lateral alae (arrowheads, unstained worm, 40× original magnification). Higher magnification of the worm (right) reveals characteristic eggs of Enterobius vermicularis (unstained, 400× original magnification).
