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