The attached .pdf file shows where the positive horses are.  Note the following definitions:
 
 
Exposed Horses: Horses that attended the Ogden, Utah event from April 29 to May 8 and horses that subsequently came into contact with horses that attended the Ogden, Utah event (secondarily exposed).
 
Exposed Premises: Premises with exposed horses.
 
Suspect EHV-1 case: A horse exposed to EHV-1 that develops fever (rectal temperature above 101.5 oF), but has no neurologic signs at this time.
 
Confirmed EHV-1 case: A suspect EHV-1 case with laboratory confirmation of EHV-1 infection, but has no neurologic signs at this time.
 
Suspect EHM case: A horse exposed to EHV-1 that develops neurologic signs. (Posterior incoordination, weakness, recumbency with inability to rise, and/or bladder atony are most commonly seen in EHM cases.)
 
Confirmed EHM case: A suspect EHM case with laboratory confirmation of EHV-1 infection.
 
NOTE THAT THERE ARE ONLY 12 CONFIRMED EHM CASES, AND THERE ARE 21 EHV-1 CONFIRMED CASES.  The cases are all traced to the NCHA Ogden horse show.  All exposed horses have been identified and their owners have been contacted by the State Animal Health officials.  All suspect and confirmed cases are under either voluntary or state quarantine.  This is not epidemic proportions.
 
Remember that "exposed horses" are not necessarily infected, nor will they get the disease.  Confirmed EHV-1 horses are NOT neurologic, they swabbed positive for the virus.  The horses that are showing neurologic signs are listed as EHM cases.
 
There are two additional recent confirmed positive EHV-1 cases in California that are not on this chart.
 
Hope that this helps.
 
Susan Gillen DVM
susangillen@gotsky.com
"We have tried spending money. We are spending more than we have ever spent before and it does not work.  After eight years of this Administration we have just as much unemployment as when we started. . . and an enormous debt to boot!"    -   Henry Morgenthau, Secretary of the Treasury under Franklin D. Roosevelt and one of FDR's closest advisers