Reproductive Diseases of Cattle

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Reproductive Diseases of Cattle

• Floron C. Faries, Jr., DVM, MS
• Professor and Extension Program Leader for
  Veterinary Medicine
• Texas AgriLife Extension Service
• Texas AM System

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Reproductive Diseases

• Bacterial
• Brucellosis (Bangs)
• Leptospirosis (Lepto)
• Vibriosis (Vibrio)
• Viral
• Infectious Bovine Rhinotracheitis (IBR)
• Bovine Viral Diarrhea (BVD)
• Protozoal
• Trichomoniasis (Trich)
• Neosporosis (Neospora)

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• Bovine Viral Diarrhea
• (BVD)

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BVD Infection during Pregnancy
infertility
congenital defects
repeat breeding
immune response
d 0
d 283
d 125
d 150
d 58
d 90
persistent infection
abortion, stillbirth
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HOW TO MAKE A PI
Susceptible pregnant female (non-PI) infected
with BVDV at about 1½ - 4 months of gestation.
BVDV persistently infected (PI) female becomes
pregnant.
BVD Virus
BVD Virus
BVD virus from any source
Less common route (Less than 10)
Most common route (Over 90)
BVDV persistently infected (PI) calf is produced.
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Most Common Way of Transmission

• Direct contact with PI cattle!

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Diagnosis

• Skin biopsy
• Formalin fixation
• Immuno-histo-chemistry
• No interference from maternal antibody
• Only test animal once

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• Viral isolation from serum
• Maternal antibody can interfere
• Must repeat positives in 3 weeks
• Serology
• Limited use

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Prevention

• Biosecurity
• Pre-entry test skin biopsy
• Replacement heifers and bulls
• Stocker and feeder cattle
• Proper nutrition
• Vaccination