Iron toxicity in neonatal foals.

The research article investigates the cause of acute hepatic failure in newborn Shetland foals after they ingested a dose of 16 mg/kg body weight ferrous fumarate. The study finds a link between this iron compound and the onset of ‘toxic hepatopathy’ in foals, which was observed in the US in 1983. Vitamin E and selenium deficiency may amplify this effect.

Research Purpose and Methodology

• The primary aim of the research was to determine the cause of acute hepatic (liver) failure in newborn Shetland foals that had ingested approximately 16 mg/kg body weight of ferrous fumarate, an iron compound.
• For the purpose of the study, lesions observed in these foals were carefully examined and compared with lesions in foals administered an oral digestive inoculant containing the same iron compound.

Key Findings

• The study found that the lesions in foals that died from acute hepatic failure and those administered an oral digestive inoculant containing ferrous fumarate were virtually identical. This suggested the involvement of this iron compound in the onset of the condition.
• Interestingly, the characteristics of the observed syndrome were similar to ‘toxic hepatopathy,’ an illness observed in foals in the United States in 1983.
• These findings led to the conclusion that newborn foals are susceptible to toxicity from low doses of iron compounds during their first few days of life.

Possible Contributing Elements

• In addition to the iron compound’s toxicity, the study also suggests that the vulnerability to this toxicity could be enhanced by deficiencies in Vitamin E and selenium. These elements are critical for the normal functioning of the body, and their deficiency could impair the body’s ability to deal with toxic substances potentially.