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.

    • CALF DIARRHEA/SCOURS

    Immunity+® & Calf Diarrhea/Scours
    Calf scours (diarrhea in young calves) is one of the most common and costly calfhood diseases on dairy farms. It primarily affects calves in the first 30 days of life and has both direct costs (like treatment) and long-term impacts (like reduced growth and productivity).

    Estimated Cost of Calf Scours/Calf Case:
    $40 to $300+ per case
    Mild cases: ~$40–$100
    Severe cases: >$200 (especially if dehydration or death occurs)

    Semex's Immunity+ enhances calves' natural immune response, helping them better resist and recover from infections that cause diarrhea. It's a genetic strategy, not a treatment — so it works indirectly by breeding healthier, more disease-resistant animals.

    How Immunity+ Helps Fight Calf Scours:
    Immunity+ uses genetic selection to improve the immune competence of dairy cows and their offspring:

    • Stronger Passive Immunity
      • Calves get their first immune protection from colostrum.
      • Immunity+ cows produce higher-quality colostrum with better antibodies.
      • This gives calves a stronger start to fight off diarrhea-causing pathogens.
    • Higher Calf Immune Response
      • Immunity genetics are heritable.
      • Calves born to Immunity+ sires are more likely to inherit strong immune systems.
      • These calves:
        • Respond better to vaccines
        • Recover faster from infections
        • They are less likely to develop severe diarrhea
    • Reduced Disease Incidence
      • Studies show calves with high immune response genetics have lower rates of common calfhood diseases, including diarrhea and pneumonia.

    Summary: In short: Immunity+ doesn’t treat calf diarrhea — it helps prevent it by building a more disease-resistant herd, starting with the immune strength of the calf from birth.

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

  • Immunity+ - What's Known So Far


    		•
    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®