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.
A — Endoscopic view of tracheal collapse and stenosis (black arrows) at the level of the thoracic inlet in a 4-month-old Holstein-Friesian female calf. B — Lateral thoracic radiograph showing severe narrowing of the trachea starting at the level of the fifth cervical vertebra (white arrow).
