 In January 2007, UC Davis presented their findings at the Plant and Animal Genome Conference Equine Workshop indicating the ability to identify horses that carry HERDA.A full accounting of this work, detailing the mapping and identification of a mutation in the gene coding for peptidylprolyl isomerase B, was published on May 11, 2007.Concurrent with publication of these results, the Veterinary Genetics Laboratory at UC Davis began offering a genetic test to identify carriers of the disease allele.