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Inappropriate lactation in a 15-year-old thoroughbred mare
1Ontario Veterinary College, University of Guelph, Guelph, Ontario N1G 2W1.
Summary
A mare experienced unexplained milk production. After ruling out common causes like Cushing's disease and infection, idiopathic inappropriate lactation was diagnosed and treated with pergolide.
Area of Science:
- Veterinary Medicine
- Equine Endocrinology
Background:
- Inappropriate lactation in mares can be a sign of underlying health issues.
- Equine Cushing's disease (pituitary pars intermedia dysfunction) is a common differential diagnosis.
Purpose of the Study:
- To investigate the cause of inappropriate lactation in a 15-year-old thoroughbred mare.
- To determine the appropriate diagnostic and therapeutic approach.
Main Methods:
- Biochemical testing to rule out equine Cushing's disease.
- Milk cytology to assess for mastitis or neoplasia.
- Bacterial culture of milk samples.
Main Results:
- Biochemical tests excluded equine Cushing's disease.
- Cytology and bacterial culture did not indicate mastitis or neoplasia.
- The mare was diagnosed with idiopathic inappropriate lactation.
Conclusions:
- Idiopathic inappropriate lactation can occur in mares without identifiable causes.
- Pergolide treatment was recommended for this case.
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