California is bracing for an onslaught of West Nile virus (WNV) in horses this year. N. James MacLachlan, BVSc, PhD, of the University of California, Davis, said that he and his colleagues expect to see the first dead birds infected with WNV in April, followed by the first horse and human cases in June and July. To help California horsemen prepare, the U.C. Davis Center for Equine Health (CEH