Problem 5

1
Problem 5

• Brandon Kurth
• Bill Sattler
• Kay McMahon
• Emily Barabe

2
Scenario

• Farmette in Western Dane County
• 8 cow-calf pairs
• 5 Horses
• 4 mares (2 pregnant)
• 1 gelding

3
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

4
Vaccine Schedule

• 4-way vaccine (annually given in spring)
• East and West Equine Encephalomyelitis
• Influenza
• Tetanus

5
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

6
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

7
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

8
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

9
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