Article Sep 2, 2014
PEDV Immunity: Past and Present
Getting a handle on immunity to porcine epidemic diarrhea virus (PEDV) has been difficult. First, it was the absence of antigen reagents to measure serological responses. Then it was trying to figure out if sows really had to show clinical sickness to develop immunity, and if the serological response after feedback really did disappear in a matter of weeks. Working with commercial sow herds in North Carolina, Iowa, and Minnesota, we found that, after one good feedback exposure, sows with or without clinical signs routinely became infected and shed PEDV, but amount of shedding was less in non-clinical sows.