Botulism in foals less than 6 months of age: 30 cases (1989-2002).

The research article investigates the outcomes in treating botulism in foals (young horses) under six months old, demonstrating that the use of antitoxin and additional supportive care results in high survival rates, despite the disease’s severe effects and often rapid progression.

Context and Importance of the Study

• The paper focuses on botulism in young horses, commonly referred to as the “Shaker foal” disease. Botulism, recognised since the 1960s, is a serious condition that causes progressive muscular weakness in foals, often leading to fatal respiratory muscle paralysis if left untreated.
• The high incidence of botulism in the United States, particularly in Kentucky and the mid-Atlantic region, emphasizes the importance of researching treatment outcomes and improving survival rates.

Purpose and Methodology of the Study

• The authors conducted this research with an objective to assess the outcomes in foals diagnosed with botulism and treated at the George D. Widener Large Animal Hospital, New Bolton Center, during the period 1989-2002.
• They examined the case histories of 30 foals, all of whom were under six months of age at the time of diagnosis.

Findings and Conclusion

• Of the 30 foals, only three did not survive. Two were euthanized for economic reasons, while another died during treatment. The survival rate of the treated cases was found to be greater than 96%.
• Half of the cases necessitated oxygen therapy, and around 30% required mechanical ventilation, evidencing the seriousness of the disease and the intensive care required for recovery.
• All but one foal, which was mildly affected, received botulism antitoxin. The average duration of hospitalization for the foals was 14 days.
• The study asserts that when provided with appropriate treatment, including early administration of botulism antitoxin and necessary supportive therapy, foals with botulism have a high survival rate. This finding challenges any assumption that the disease carries a high mortality rate.