Potomac Valley Horse Fever

BloodHorse  is running a fascinating article on Potomac Valley Horse Fever, an illness that used to be baffling. Nobody was sure how it spread, how to prevent it or how to treat it. Now we know more about it but the vaccine is suboptimal, with an 89 percent failure rate.

http://www.bloodhorse.com/horse-racing/articles/75205/factors-associated-with-surviving-potomac-horse-fever-aaep-2012