Red maple (Acer rubrum) leaf toxicosis in horses: a retrospective study of 32 cases.

The research investigated factors that may influence the outcome of red maple leaf toxicosis in horses. They concluded that data obtained upon the initial examination of affected horses could not accurately predict survival outcomes. However, treatments involving corticosteroids were associated with higher mortality rates.

Study Methodology

The researchers developed a multi-institutional retrospective study which involved horses that had been diagnosed with red maple leaf toxicosis in the southeast region of the United States. Their goal was to identify factors that could predict mortality rates in these horses.

Key Findings

• Out of the thirty-two horses diagnosed with red maple toxicosis, nineteen died as a direct result of the condition.
• A majority of horses presented with symptoms such as anemia, and evidence of systemic inflammation was observed in twenty-four of the affected horses.
• Twelve out of thirty horses were identified with renal insufficiency, a condition where the kidneys fail to sufficiently filter waste products from the blood.
• Horses with red maple toxicosis also exhibited other illnesses such as laminitis and colic. However, these conditions did not impact short-term survival.
• Horses that survived long enough to be discharged were likely to have developed pyrexia, a condition characterized by a fever.
• Horses that were treated with a type of medication called corticosteroids had a significantly increased likelihood of death. There was no significant relationship between initial serum hemoglobin concentration, methemoglobin concentration, or percentage methemoglobin and mortality in these horses.

Conclusions

The study concluded that the clinical data collected from the initial examination of horses suffering from red maple toxicosis could not accurately predict whether the animal would survive or not. One of the significant findings of the study was the higher mortality rate associated with corticosteroid treatment, suggesting that these drugs are not suitable for use in treatment protocols for red maple toxicosis in horses.