I have a mare here for breeding. Last year she aborted. Necropsy showed that he had lesions on his heart and lungs from sepsis from a 4 way infection (strep, staph, yeast). Mare was treated, they tried breeding twice last year, she did not take. Vet said culture was done and had scant yeast, but he said lots where coming back with the same result. Mare arrived this year for breeding, a culture was done, vet did not do cytology, result came back as Scant Streptoccoccus dysgalactiae and Scant Mixed Urogenial/Skin Flora. It is susceptible to Ampiicillin, so he did a post breeding infusion, I asked for oxytocin, he said it was not needed. Mare is not pregnant. He wants to do 2 prebreeding flushes with ampicillin, and put her on Penicillin injections as it was susceptible to that also, breed her and then another post breeding infusion with ampicillin. She was ultrasounded today and is a 24mm. I would like to get a cytology, as soon as she is showing to the stallion, breed her, then use Oxytocin till she goes out, and do a post breeding infusion pending cytology results and have a caslick done. Mare is being bred AI with fresh semen. The fetus she lost would have been her first foal, it took a couple of tries before she conceived. What is your opinion?
Obviously I may not be privy to other things that the veterinarian is aware of, so I can only respond to the specifics of the post.
Culture results alone, without a cytology smear, are always suspect and it does sound as though it is more likely that a contaminant organism was present on the culture than a true uterine pathogen. I would however be nervous about the treatment with an antibiotic in the face of the previous year's "scant yeast" result as introduction of an antibiotic to a yeast-environment is potentially asking for trouble.
If it were my mare, I think I would want to do diagnostics all over again, and include a cytology and possible a culture looking for yeast. It would probably be best to get that all done and an "all clear" before breeding, as you don't want her to get pregnant and then have a repetition of the last pregnancy.
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