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Problem 5. Brandon Kurth Bill Sattler Kay McMahon Emily Barabe. Scenario. Farmette in Western Dane County 8 cow-calf pairs 5 Horses 4 mares (2 pregnant) 1 gelding. What happened. One of the mares ( 9 months preg) aborts All horses were vaccinated with a 4-way vaccine last May

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problem 5

Problem 5

Brandon Kurth

Bill Sattler

Kay McMahon

Emily Barabe

scenario
Scenario
  • Farmette in Western Dane County
  • 8 cow-calf pairs
  • 5 Horses
    • 4 mares (2 pregnant)
    • 1 gelding
what happened
What happened
  • One of the mares ( 9 months preg) aborts
  • All horses were vaccinated with a 4-way vaccine last May
  • In Jan/Feb two of the horses came back from a show
    • All developed respiratory problems
  • The other mare is 6 months pregnant- what should be done to prevent her from aborting
vaccine schedule
Vaccine Schedule
  • 4-way vaccine (annually given in spring)
    • East and West Equine Encephalomyelitis
    • Influenza
    • Tetanus
what caused the abortion
What caused the abortion?
  • Equine Herpes Virus (Rhinopneumonitis)
  • Two strains
    • EHV1- Causes abortions (6-11 months)
    • EHV4- Causes respiratory problems
  • Transmitted by:
    • Direct feed and water contamination
    • Direct contact with other infected horses
slide6
EHV
  • Causes abortion 2 weeks- 4 months after respiratory symptoms are present
    • 85% of the abortions happen in the last three months of gestation
    • Can happen without any other symptoms
prevention
Prevention
  • Proper shots
    • EHV vaccine at 3,5,7,9 months of gestation
    • 4- way yearly booster for all horses
    • Strangles
    • Rabies
    • Potomac Horse Fever
  • Isolation of the mares after traveling
    • Prevents spreading
what about the 6 month mare
What about the 6 month Mare?
  • Begin EHV vaccination as soon as possible
    • Start at 6 months
    • Continue at 7 months and at 9 months
  • Isolation of the 6 month mare
testing
Testing
  • Send in tissues
    • either the lung, spleen, liver, and adrenal glands are usually used to test for EHV
  • Virus detection
    • With a PCR or culture test