Severity and outcome of equine pasture-associated laminitis managed in first opinion practice in the UK.

This study looks at 107 cases of equine laminitis, a hoof disease, from first opinion practices to identify factors related to the severity of the disease, the survival chances, and the horse’s ability to return to exercise. The research found that factors such as lower body weight, optimal body condition, and mild laminitis increased survival chances, while previous occurrences of laminitis and higher body mass showed trends towards more severe cases.

Study Overview

• The research involved 107 cases of horses suffering from pasture-associated laminitis collected from first opinion veterinary practices in the UK. This study aimed to determine what factors are linked with the severity of the disease, the chances of survival, and whether the horse could return to ridden exercise.

Study Population

• The subjects in the study were 43 mares and 64 geldings, covering various horse types including small ponies, large ponies/cobs, small horses, and large horses. The median age of the animals was 11 years.
• Out of the 107, 97 horses were identified as having laminitis based on the definitions by Cripps and Eustace. Among the affected, 76 had mild laminitis and 31 had severe laminitis.
• 43 of these horses had a previous history of laminitis. These horses were significantly less likely to develop severe laminitis compared to horses that had no previous laminitis.

Findings and Observations

• A majority of the animals, 89 to be exact, were overweight. The findings exhibited a trend towards higher body mass indices being associated with severe laminitis cases.
• Eight weeks after the disease was detected, 102 out of the 107 horses were alive. Factors like lower body weight, optimal body condition, and mild laminitis, as well as the category of acute/chronic founder as defined by Cripps and Eustace, were significantly connected to survival.
• A noticeable trend was observed where survival of the horses was associated with treatment involving acepromazine, a tranquillizer.
• Of the 81 horses that were used for riding before the disease developed, 48 managed to return to being ridden. It was 2.6 times more probable for horses without any history of laminitis.
• A panel of veterinarians graded the clinical outcome as ‘good’ in 77 out of 107 cases. Horses types were significantly related to this, with none of the small horses having a ‘bad’ outcome, in contrast to 15 out of 45 large ponies/cobs, 11 out of 33 small ponies, and 3 out of the 12 large horses receiving ‘bad’ outcomes.