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Discussion on Problem mare...
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Member:
indigo
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Posted on Saturday, Mar 20, 2010 - 7:30 pm:
Hello Dr. O,
I have a mare that consistently comes up with positive cultures. She did have a foal last year, we cultured her on her 30 day heat and it was positive (dont remember what bacteria etc). Treated her for three days, cultured her again on her next cycle, and she was still dirty. Treated her again and she subsequently had a negative culture, but it was so late in the year I decided not to breed her, so we put a caslicks in and turned her out.
I took her to my vet this week to get her ready to breed and she once again has a positive culture/cytology. I believe she cultured pos for strep, ecoli and klebsiella. My vet initially said to flush her for three days and treat with gentamicin as this is what the bacteria showed sensitivity to. Today was her first day of treatment. Vet flushed her with betadine then infused her with the antibiotics. However, the mare's cervix is very open so she immediately "spit" most of the gentamicin back out.
Vet now wants to infuse her with penicillin for the next two days instead of the betadine, and forego the gentamicin.
Is this an appropriate course of action? If the bacteria showed sensitivity to gentamicin and not penicillin, are we really accomplishing anything by treating her with it?
Thanks!
CH
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Moderator:
DrO
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Posted on Sunday, Mar 21, 2010 - 8:55 am:
Hello CC,
There are many many factors that go into appropriate antibiotic selection. Just some of the information needed that we do not have would be:- Did the results show the organism not sensitive to penicillin?
- Was the organism a gram negative or gram positive What species was the organism?
I think the bigger question with the information provided so far is, "What is the significance of these culture results?" In the above post you seem to confuse culture and cytology, they are not the same. For an explanation of this and more on this debate see Equine Reproduction » Horse Breeding & Artificial Insemination » Uterine Culture and Cytology.
DrO
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