The United States Department of Agriculture (USDA) has released a list of additional equine cases of West Nile Virus for the year 2000. There were 2 additional equine clinical cases of West Nile virus (WNV) infection confirmed during the period from Dec. 2, 2000 to Jan. 15, 2001—one each from New Jersey and New York. Both had clinical onset during October.

One of these horses is the youngest horse ever known to develop clinical illness due to WNV in the United States, a 4-month-old colt in Monmouth County, New Jersey. This brings to 59 the total number of equine cases of clinical WNV infection in 2000, of which 36 survived and 23 (39%) died or were euthanized.

A total of 11 additional equine cases of WNV infection have been reported by the States of New Jersey (1) and New York (10) for the year 2000