Stronger Cows. Healthier Herds. More Profit.
Backed by over 25 years of research at the University of Guelph, Immunity Technology is a world-leading genetic solution that helps you breed cows with naturally stronger immune systems.

  • Healthier cows with fewer cases of mastitis, metritis, and respiratory disease
  • Lower vet and treatment costs
  • Improved fertility and longevity, keeping cows in your herd longer
  • More profit, with gains that build every generation
    By monitoring immunity in your herd, you’re not just treating disease — you’re preventing it.

  • DISPLACED ABOMASUM

    Immunity+® & Displaced Abomasum (DA)
    Displaced abomasum (DA) — particularly left displaced abomasum (LDA) — is a costly health condition in dairy cows, typically occurring within 30 days after calving. It disrupts digestion, lowers milk production, and can lead to culling if not treated.

    Estimated Cost of DA per Case:
    $340 to $700+ per cow (varies by treatment type (surgery vs. rolling), labor, milk loss, and whether complications occur)
    Total cost depends on herd size and incidence rate (often 1–5% of fresh cows)

    How Immunity+ Helps Fight Displaced Abomasum (DA)
    • Fewer Concurrent Diseases = Lower DA Risk
      • Cows with high immune response are less likely to develop diseases that trigger or worsen DA, such as:
        • Metritis
        • Mastitis
        • Ketosis
      • Studies show cows with these diseases have a significantly higher risk of developing DA. Preventing them helps prevent DA.
    • Improved Transition Cow Health
      • Immunity+ cows are:
        • More likely to eat well post-calving
        • Less likely to suffer from immune suppression
        • Better at adapting to metabolic stress
      • All of this reduces the conditions that lead to DA, such as:
        • Reduced rumen fill
        • Gas accumulation
        • Delayed abomasal motility
    • Lower Systemic Inflammation
      • DA has been linked to systemic inflammation and oxidative stress.
      • High-immune-response cows may have more regulated inflammatory responses, reducing the risk of complications that can lead to abomasal displacement.
    • Better Recovery from Illness
      • If a cow does get sick or undergo surgery for DA, high immune response helps:
        • Recover faster
        • Avoid secondary infections
        • Return to production sooner

    Summary: Semex's Immunity+ doesn't fight displaced abomasum directly, but by reducing disease burden and improving cow health around calving — the key risk period — it helps build a herd that is less prone to DA and other costly transition disorders.

    FIND OUT MORE
  • Immune Competence In Livestock

  • Prevalence Of Digital Dermatitis In Canadian Dairy Cattle Classified As High, Average Of Low Antibody And Cell-Mediated Immune Responders

  • Incidence Rates Of Clinical Mastitis Among Canadian Holsteins Classified As High, Average, Or Low Immune Responders

  • Genetic Parameters For Natural Antibodies And Associations With Specific Antibody And Mastitis In Canadian Holsteins

  • High Immune Response Sires Reduce Disease Incidence In North American Large Commercial Dairy Populations

  • Breeding Your Cows For High Immune Response Can Result In A Herd Less Prone To Mastitis

  • We Can Now Find The Best Immune Systems

  • Bovine Mastitis: Frontiers In Immunogenetics

  • Association Of Disease Incidence And Adaptive Immune Response In Holstein Dairy Cows

  • A Genome-Wide Association Study For Natural Antibodies Measured In Blood Of Canadian Holstein Cows


  • DISEASES
    BIRD FLU – H5N1
    BOVINE LEUKOSIS
    BOVINE TUBERCULOSIS
    CALF DIARRHEA/SCOURS
    DIGITAL DERMATITIS
    DISPLACED ABOMASUM
    ENDOMETRITIS/METRITIS
    INTERDIGITAL HYPERPLASIA
    JOHNE'S DISEASE
    KETOSIS
    MASTITIS
    PNEUMONIA
    RETAINED PLACENTA

    IMMUNITY TECHNOLOGY
    Only from Semex Elevate® and Neogen®