Problem 5Problem 5

Brandon KurthBrandon KurthBill SattlerBill Sattler

Kay McMahonKay McMahonEmily BarabeEmily Barabe

ScenarioScenario

Farmette in Western Dane CountyFarmette in Western Dane County

8 cow-calf pairs8 cow-calf pairs

5 Horses5 Horses 4 mares (2 pregnant)4 mares (2 pregnant) 1 gelding1 gelding

What happenedWhat happened

One of the mares ( 9 months preg) abortsOne of the mares ( 9 months preg) aborts All horses were vaccinated with a 4-way All horses were vaccinated with a 4-way

vaccine last Mayvaccine last May In Jan/Feb two of the horses came back In Jan/Feb two of the horses came back

from a show from a show All developed respiratory problemsAll developed respiratory problems

The other mare is 6 months pregnant- The other mare is 6 months pregnant- what should be done to prevent her from what should be done to prevent her from abortingaborting

Vaccine ScheduleVaccine Schedule

4-way vaccine (annually given in 4-way vaccine (annually given in spring)spring) East and West Equine EncephalomyelitisEast and West Equine Encephalomyelitis InfluenzaInfluenza TetanusTetanus

What caused the abortion?What caused the abortion?

Equine Herpes Virus Equine Herpes Virus (Rhinopneumonitis)(Rhinopneumonitis)

Two strainsTwo strains EHV1- Causes abortions (6-11 months)EHV1- Causes abortions (6-11 months) EHV4- Causes respiratory problemsEHV4- Causes respiratory problems

Transmitted by:Transmitted by: Direct feed and water contamination Direct feed and water contamination Direct contact with other infected horsesDirect contact with other infected horses

EHVEHV

Causes abortion 2 weeks- 4 months Causes abortion 2 weeks- 4 months after respiratory symptoms are presentafter respiratory symptoms are present 85% of the abortions happen in the last 85% of the abortions happen in the last

three months of gestation three months of gestation Can happen without any other symptomsCan happen without any other symptoms

PreventionPrevention

Proper shotsProper shots EHV vaccine at 3,5,7,9 months of EHV vaccine at 3,5,7,9 months of

gestation gestation 4- way yearly booster for all horses4- way yearly booster for all horses StranglesStrangles RabiesRabies Potomac Horse FeverPotomac Horse Fever

Isolation of the mares after travelingIsolation of the mares after traveling Prevents spreadingPrevents spreading

What about the 6 month What about the 6 month Mare?Mare?

Begin EHV vaccination as soon as Begin EHV vaccination as soon as possiblepossible Start at 6 monthsStart at 6 months Continue at 7 months and at 9 monthsContinue at 7 months and at 9 months

Isolation of the 6 month mareIsolation of the 6 month mare

TestingTesting

Send in tissuesSend in tissues either the lung, spleen, liver, and either the lung, spleen, liver, and

adrenal glands are usually used to test adrenal glands are usually used to test for EHVfor EHV

Virus detection Virus detection With a PCR or culture testWith a PCR or culture test