Regional Threat for West Nile Virus in 2009

More than 530 readers of TheHorse.com responded to a poll asking, "Was West Nile virus a threat in your area last year? If so, where do you live?"

results of poll on regional West Nile virus outbreaks

 

Results were as follows: 

  • No: 25.97% (140)
  • Yes, Western U.S.: 23.01% (124)
  • Yes, Southeast U.S.: 16.14% (87)
  • Yes, Northeast U.S.: 14.47% (78)
  • Yes, Midwest U.S.: 15.03% (81)
  • Other: 5.38% (29)

Readers shared their experience with West Nile virus in 2009 in the comments below.

Results of weekly polls from TheHorse.com are published in The Horse Health E-Newsletter. Published every week, this e-newsletter offers news on diseases, veterinary research, health events, and in-depth articles on common equine health conditions and what you can do to recognize, avoid, or treat them. Sign up for our e-newsletters using the form above or on our e-newsletter page.  

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Poll sponsored by Intervet/Schering-Plough Animal Health.


  • yes, maryland considered mid atlantic
  • I live in MI but had no problems with it in my area.
  • Northeast--I wouldn't say it was common but there was an occasional case.
  • Los Angeles
  • The Netherlands
  • Illinois
  • Alaska
  • Oregon, mid-Willamette Valley
  • Midwest
  • Yes - So. Central US
  • I live in Central Vermont
  • PATIALA INDIA
  • central texas
  • Live in SoCal with alot of irrigation canals - WNV scares me so I vaccinate every year.
  • Midwest
  • SW ontario, canada
  • Central Ks
  • central florida
  • Not as far as I heard--Midwest
  • FL
  • not concrened and do not vaccinate for WNV
  • Tel Aviv, Israel
  • few cases western NY
  • Northeast US (NY)
  • Midwest
  • southwest, az in particular. There were some cases, not a lot.
  • Pacific Northwest
  • Southeast Ontario, Canada
  • It is crazy NOT to vaccinate against West Nile where we live, (MS).
  • Midwest. check the disease maps. Not a hot topic
  • Texas
  • mideaster states - Virginia. It was a problem in the early outbreak some years back.
  • do not know of any horses that contracted wn...live in AZ
  • Southwest Virginia
  • No, not that I'm aware of anyway. Manitoba Interlake region
  • rcky mtn region
  • Sacramento CA
  • It will be worse this year due to lots of rain leaving full ponds and lots of wet swales.
  • Southwest
  • South central Ontario
  • united arab emirates
  • Yes Northwest. Compliments of USDA on Plum Island, NY home of WNV
  • Yes, South Africa and we have no vaccines.
  • Arizona, several cases in humans, only a couple in horses that I know of
  • my 19 year old Arabian is a west nile survivor from 4 years ago
  • I have not heard of any cases in Northern California
  • NM
  • Nova Scotia
  • SW Idaho - Idaho lost MANY horses (and humans) before reacting to the West Nile threat
  • Virginia
  • nova scotia
  • Paso Robles, CA
  • had a foal on the farm diagnosed with WN in CO
  • Texas
  • Too manypeople don't vaccinate their horses and the disease proliferates.
  • Northwest
  • NM
  • Southern California. Very few reports in birds, none in horses.
  • Central Canada
  • I live in southwestern Wyoming, and west nile was found in mosquitos less than 1/4 mile from my hous
  • northeast u.s.
  • Nova Scotia, Canada
  • Midwest, US
  • Okanagan BC
  • Not a pronounced threat in my area, but you NEVER know...
  • Yes a threat, but I heard of no cases in the Tri-state area ( Ky, Ill, Ind)
  • Western
  • Florida is mosquito heaven
  • southern Ontario Canada
  • midwest Wi my vet didnt mention that there was an issue
  • southeast
  • Deffidently....Southeast USA
  • northeast
  • Hungary
  • Western US
  • Nevada
  • yes western canada
  • Not a lot of it around last year in Alberta Canada
  • Western WA
  • nobody around me that i knew of, mid-mn
  • washington state leading in cases of West Nile Virus
  • Northeast
  • at least no cases that I know of...SE U.S.
  • Northwest US
  • central PA
  • Texas 05/61 06/111 07/94 08/19 2009/29 ?drought 2008? still vaccinate
  • sc
  • BC Canada
  • There were some cases but not as bad as pervious years. Midwest
  • Northwest
  • Florida
  • in MN its always a threat
  • ohio valley
  • I always vaccinate just to be safe because we have lots of misquitoes each year
  • So E even being in the swamp-no problems
  • Montana
  • San Luis Obispo county, California
  • Vermont
  • No-Midwest
  • I live in central fl. My vetr said there were not many cases in our ares. there were no cow birds
  • Contra Costa County in California
  • 1 horse in British Columbia Canada
  • Southwest, Texas
  • We don't have WNV in Ireland
  • southeast
  • Yes, South Central B.C.
  • So. Oregon, although we are cautious and still vaccinate.
  • Not as many horses tested positive in Western Colorado
  • Western Wisconsin, low that I know of
  • Western US/No. California
  • southeast U.S.
  • A friends horse died from the virus.
  • we live in KY and do not have mosquitoes
  • Ohio
  • Last year in AZ, not so bad, but always a threat
  • Northeast, specifically Vermont
  • oklahoma
  • central California right on the coast
  • East central Missouri - No cases I heard of from my vet
  • W. Oregon - I didn't hear of any but we all vaccinate.
  • Northwest (southwestern Oregon)
  • you should have the categories nw and sw
  • midwest/minnesota
  • I do live in Northeast Europe
  • Dallas, not that I know of
  • Virginia -more Mid-Atlantic region
  • I live in SE Virginia
  • Southern Canada -- Ontario
  • I persoally do not know ANYONE in SW MO. that has had a case of WNV.
  • Northwest-Specifically Washington State
  • southeast nebraska
  • I live in NM and there were several cases. this year with all the rain, horse owner's are being extr
  • California
  • Even if only 1 horse gets WNV, that makes it a threat here.
  • Kansas-don't hear much about it anymore
  • We live in AK and it has not made it up here yet :)
  • Rocky Mtns.
  • south west British Columbia Canada
  • southwest
  • I keep goldfish in my horse tank to help control larva.
  • WNV has been on Long Island (outside NYC) for a few years.
  • Central Midwest
  • A much smaller threat than in previous years but still a threat.
  • Az has 18 genera of mosquitoes. A few can carry the viral load for transmission. Occassionally seen
  • Northeast
  • East Coast central
  • Western US
  • Midwest Iowa
  • NW
  • Northwest
  • western u.s.
  • South Texas
  • Northern Wisconsin - drought area 2009
  • Midwest
  • our vet says he sees a couple cases every year, in unvaccinated horses.
  • North Central Idaho
  • did not hear of any cases in Arkansas
  • Southeast Texas - don't know if that's considered southeast US or western US
  • several deaths in SE Michigan
  • Northeast U.S.
  • Oregon
  • west coast and not found in our area lastyear
  • live in southern Nevada
  • We had a big crow and jay die-off due to ENV
  • CO, AK
  • I live in SE Virginia and it is definately a problem around here.
  • Yes, N. TX
  • Southwest U.S.
  • ARIZONA
  • Northwest - Washington
  • Only a few cases - MidAtlantic
  • Washington State
  • I live in The Netherlands, Europe
  • northeast
  • Central Kentucky
  • NW Nevada dry yr.
  • WNV is present in central Ontario. At least one horse was diagnosed in my County last year.
  • alpine, tx
  • Midwest, US
  • I didn't know of amy WNV in the northern area of SC last year.Mine got shots.
  • Midwest
  • Northeast
  • kentucky

About the Author

Megan Arszman

Megan Arszman received a Bachelor of Science In print journalism and equine science from Murray State University in Murray, Ky., and loves combining her love of horses, photography, and writing. In her “free time,” when she’s not busy working as a horse show secretary or riding her American Quarter Horses on her parents’ Indiana farm, she’s training and competing her Pembroke Welsh Corgi and Swedish Vallhund in dog agility and running.

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