Zoetis Inc. has announced that the U.S. Department of Agriculture (USDA) has granted a conditional license for a vaccine to help fight porcine epidemic diarrhea virus (PEDv) in pigs. The two-dose inactivated vaccine, licensed for use in healthy pregnant female pigs (sows and gilts), is designed to help them develop antibodies which can be transmitted to their newborn piglets. Zoetis anticipates the vaccine will be available to veterinarians and pig farmers in September. [Source: Zoetis press release, 9/3/2014]
The vaccine is given as a 2 mL intramuscular (IM) injection to sows or gilts prior to farrowing (giving birth). Two doses given three weeks apart are recommended, with the second dose given two weeks pre-farrowing. Previously vaccinated sows should receive a single dose given two weeks before farrowing. On average, female pigs farrow twice each year.
In order to receive the conditional license, the vaccine was shown to be safe in a field safety study, and a reasonable expectation of efficacy was demonstrated. Zoetis is working to complete the studies necessary to obtain full licensure in the U.S.