Source:  Various

 

Since response to the current outbreak of EHV-1 is directed by individual states and provincial veterinarians, accurate numbers of current cases are not located in a central source.  The Veterinary Infection Control Society (VICS)  has been collecting information to  help clarify the situation.

 

As of May 18, these are the numbers:

 

Location	Confirmed	Comment	Suspected	Comment
Washington	3		3	Fever
Colorado	6	1 death	14	1 death
California	10	At least 1 death
British Columbia	3	Independent confirmation lacking
Alberta	1	Mild neurological disease	2
Idaho	1	1 death	2	1 death, 1 fever
Utah	5
Arizona			2	2 deaths
New Mexico			2

Oregon	1	Healthy but infected

They note that some horses that did not attend the Utah cutting have developed positive symptoms.

Concerningly, these reports include infections both in horses that were at the Utah event as well as horses that had subsequent contact with those that were at the event. This secondary transmission means that at this point not all infected horses will have a direct link to the event (i.e. just because a particular horse didn't go to that show doesn't mean it can't be affected).

The VICS information was published on the EquiDblog which is a project of the Ontario Veterinary College at the University of Guelph and is coordinated by Drs. Scott Weese and Maureen Anderson.