Feed samples were collected at three farms - one in northwest Iowa and two in southwest Minnesota, where PED was found. Tests were then conducted at the university, where five piglets were given what was believed to be infected feed – all five animals became ill. Another group of piglets was given a placebo and were not infected with PED. It should be noted that the study did not examine how the feed became infected with the virus.
The lead author of the study, Scott Dee, Director of Research for Pipestone Veterinary Clinic in Minnesota, said that while livestock feed has always been thought to be a risk factor, not one has been able to verify it until now. Dee hopes that the study will encourage more collaboration between the swine, feed and veterinary industries to mitigate the spread of the virus.
According to the National Animal Health Laboratory Network, which is tasked with tracking the spread of the disease, during the month of August 2014 there were almost 8,000 positive cases of the virus found. Iowa, the nation’s largest pork producer has had the most outbreaks of PED.
The virus causes diarrhea, vomiting and diffraction in all ages of pigs. The disease is almost 100 percent fatal for piglets, while older pigs typically recover from the illness. PED poses no risk to humans or other animals.
Meanwhile in Canada, the feed connection to the virus was confirmed in February 2014. Shortly after PED was detected in the U.S., Canada had its first case of the virus being identified on January 22, 2014, on an Ontario hog farm in Middlesex County. The virus has since spread to numerous farms in several provinces.