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Solving Chronic Endometritis in Mares: Why Activating Dormant Bacteria Is the Key to Successful Treatment

21. March 2025

🧬 The Hidden Challenge: Dormant Bacteria Like Streptococcus zooepidemicus

In many mares, pathogenic bacteria such as Streptococcus zooepidemicus or E. coli lie dormant inside the uterus. They may not show up in swabs or cultures, and they may not trigger a strong immune response.

📉 That means:

  • Standard diagnostic tests may appear “clean”
  • Antibiotics may seem ineffective
  • Inflammation and fluid retention persist
  • Fertility drops dramatically

These dormant bacteria are inactive, not multiplying – which makes them resistant to antibiotics, since most antibiotics only work on bacteria that are actively growing.


✅ The Solution: Activate First, Then Treat

bActivate is not a probiotic. It’s a biological growth medium specifically designed to activate dormant bacteria – including Strep zoo.

Here’s the step-by-step process:

1. bActivate is administered intrauterine

It stimulates the reactivation of dormant bacteria, waking them up and pushing them into a metabolically active phase.

2. Within 24–48 hours, the bacteria begin to grow

This is a critical window, because now the pathogens are:
✔️ Detectable on culture
✔️ Biologically active
✔️ Susceptible to antibiotics

3. Targeted antibiotic therapy is then applied

At this point, treatment with penicillin or another targeted antibiotic can effectively eliminate the now-active infection.


💡 Why This Approach Works

By combining biological activation with targeted antibiotic treatment, you’re solving the problem from both ends:

🦠 bActivate exposes the hidden threat
💉 Antibiotics eliminate it effectively

This strategy is especially effective in:

  • Mares with recurrent or subclinical endometritis
  • Mares with a history of antibiotic failure
  • Mares showing fluid retention but clean swabs
  • Barren mares with no obvious reason for infertility

📈 Real-World Results

Breeders and veterinarians using this method report:
✔️ Improved diagnostic clarity
✔️ Better response to antibiotics
✔️ Reduced recurrence of infection
✔️ Higher conception rates in previously barren mares


🐴 Final Thoughts: Treat Smarter, Not Just Harder

If antibiotics alone haven’t worked, it’s not because they’re the wrong medicine — it might be because the bacteria you’re targeting aren’t awake.

bActivate makes them visible.
Antibiotics make them gone.

This dual-phase strategy represents a smarter, evidence-based solution to one of the most frustrating causes of mare infertility.


📞 Want to know how to integrate this protocol into your breeding program?
Get in touch with us today or speak to your veterinarian about using bActivate before antibiotic treatment.


Reviews

Our clients experience

Success! After 3 years of hardship

bActivate has been tested by the therio group at Hagyard Equine Medical Institute, the world's largest equine hospital in Kentucky who basically normalized mare fertility by including bActivate into the standard repro work-up.

I used bActivate and after just one covering got a COLT foal — after 3 years of hardship where the mare went in foal but never managed to produce a live foal.

Breeder Mary Davison,

Cathrinestown Stud Farm, Leixlip, Ireland

FAQ

Frequently Asked Questions

Common questions about problem mares, biofilm infections and bActivate treatment.