West Nile Virus Case Definition

“Probable,” “presumptive,” “suspected,” and “confirmed.” All of these words are used to describe equine cases tested for West Nile virus (WNV). The cases might be “confirmed” on a local, state, or national level. What do these descriptions mean, and why don’t the totals reported by state and national agencies always match?

“It is easy to get confused about what

To continue reading this article, become a member of TheHorse.com.

It's FREE and you'll get full access to more than 20,000 articles, video, free reports & more.

Sign In
Stay on top of the most recent Horse Health news with FREE weekly newsletters from TheHorse.com. Learn More

Free Newsletters

Sign up for the latest in:

From our partners