Page 4 of articles about Porcine Epidemic Diarrhea

Virulence and infectivity differences between strains are notorious. Moreover, the new virus is not controlled with vaccines developed from classical strains and may yield false positives in some diagnostic tests.

An accurate diagnosis is sometimes difficult because of the common occurrence of mixed infections, the compounding effects of environment and nutrition and the difficulties experienced in isolating and identifying all the possible pathogenic agents involved.

The transmission of PEDV through the feed supply chain is an example of a complex disease transmission pathway that triggered swine feed industry stakeholders to collaborate in understanding and addressing the risk factors.

All sequenced PEDV isolates that were found recently within European countries were most closely related to so called S INDEL PEDV, which was originally described in the US in January 2014.

How much has disease changed from its first introduction? Currently, we can find a new variant that appears to be a much milder form of PEDv, there are sow herds with chronic PEDv ( ~10% of breeding herds), a few sow herds with re-breaks (~ 3-5% of herds), ….