Porcine Reproductive and Respiratory Syndrome (PRRS)

Pig in a pen.

Authors: Jeff Zimmerman, Iowa State University; David Benfield, The Ohio State University; Jane Christopher-Hennings, South Dakota State University; Scott Dee, University of Minnesota; Greg Stevenson, Purdue University


In 1987, a new reproductive and respiratory disease of pigs was recognized in the United States. A specific causal agent could not be identified at the time, so the syndrome was called …

Classical Swine Fever (CSF)

In the US, Classical Swine Fever (aka Hog Cholera) is considered a foreign animal disease. Where it exists around the world, it affects only pigs and wild boars.  Characteristic signs of the disease, such as fever and bleeding under the skin, can resemble other diseases, making it important to accurately diagnose. It was first described in the US, but has …