For more information and a list of symptoms look in the Files section. The old reference to Listerosis in Horses says it is usually fatal in humans. This is no longer true. We have no reports of owners getting sick. These cases, even if they were all related are not epidemic by any stretch, and we suspect it will abate with warmer weather. Nothing said here should be acted on without consulting your veterinarian, and none of our conclusions are to be considered as giving medical advice, especially as concerns medications. In all we found over 125 cases concentrated from January through March, distributed over the East coast, and centered over Northern Virginia. We believe that wet weather and the growing popularity of round bales probably caused this rare disease to emerge. We need similar cases to get necropsy tests for this. Recent survivors should have blood submitted for titers.