Idiopathic acute hepatic disease in horses: 12 cases (1982-1992).

The research article examines cases of acute hepatic disease in horses, particularly focusing on idiopathic acute hepatic disease. It analyzes the connection between female lactating horses treated with tetanus antitoxin at birth and the frequency of the disease. Findings suggest a need to reevaluate the routine use of tetanus antitoxin, particularly in parturient mares, due to potential associated risks.

Research Study and Methods

• The study spanned over a period of 10 years from 1982 to 1992 and identified 16 cases of acute hepatic disease in horses.
• Out of these, 12 were classified as idiopathic acute hepatic disease (IAHD), a type with no known cause.
• Most incidences occurred in female horses, specifically, those that were lactating and had been treated with tetanus antitoxin at parturition (the process of giving birth).
• The methodology for diagnosing IAHD was based on anamnesis (medical history taking), clinical signs, and serum biochemical analyses. It further involved hepatic biopsy – taking a sample of liver tissue for examination – and postmortem examination in some instances.

Findings and Recommendations

• 75% of the horses diagnosed with IAHD had died or had been euthanized within one year of the illness. It was observed that not all horses demonstrated the typical, highly noticeable signs of IAHD, making biochemical analysis crucial for timely diagnosis.
• A significant find was the apparent association of the occurrence of IAHD with the administration of tetanus antitoxin, an anti-serum used against the tetanus bacterium.
• Considering this correlation, the research suggests that the use of tetanus antitoxin carries potential risks, and its routine administration should be reconsidered, particularly when dealing with parturient mares.