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Reproductive Diseases of Cattle

Reproductive Diseases of Cattle. Floron C. Faries, Jr., DVM, MS Professor and Extension Program Leader for Veterinary Medicine Texas AgriLife Extension Service Texas A&M System. Reproductive Diseases. Bacterial Brucellosis (Bang’s) Leptospirosis (Lepto) Vibriosis (Vibrio) Viral

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Reproductive Diseases of Cattle

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  1. Reproductive Diseases of Cattle Floron C. Faries, Jr., DVM, MS Professor and Extension Program Leader for Veterinary Medicine Texas AgriLife Extension Service Texas A&M System

  2. Reproductive Diseases • Bacterial • Brucellosis (Bang’s) • Leptospirosis (Lepto) • Vibriosis (Vibrio) • Viral • Infectious Bovine Rhinotracheitis (IBR) • Bovine Viral Diarrhea (BVD) • Protozoal • Trichomoniasis (Trich) • Neosporosis (Neospora)

  3. Bovine Viral Diarrhea (BVD)

  4. BVD Infection during Pregnancy infertility congenital defects repeat breeding immune response d 0 d 58 d 90 d 125 d 150 d 283 persistent infection abortion, stillbirth

  5. 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.

  6. Direct contact with PI cattle! Most Common Way of Transmission

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

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

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

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