Antemortem Respiratory Diagnostics

Transtracheal Wash (TTW) and  Bronchoalveolar Lavage (BAL) can be very useful tools in diagnosing respiratory problems in individual animals or herd outbreaks.  They are not technically difficult to perform and are relatively non-invasive.

See the videos and PowerPoint presentation below for step-by-step instructions.

Video 1: 

"Conducting a Transtracheal Wash (TTW)" Dr. Terry Engelken




Video 2:

"Conducting a Bronchoalveolar Lavage (BAL)"  Dr Jim Thompson




Powerpoint presentation: 

Antemortem Respiratory Diagnostics by Terry J. Engelken, DVM MS, Jim Thompson, DVM MS, Vicki Cooper, DVM PhD

Contact information:

Terry J. Engelken, 515-294-2192,

Vicki Cooper, 515-294-1950,