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Hyperplastic goitre in newborn foals in Western Canada
The Canadian Veterinary Journal = La Revue Veterinaire Canadienne
|February 1, 1981
Summary
Newborn foals experienced hyperplastic goiter, with several succumbing shortly after birth. This condition is likely linked to insufficient dietary iodine intake in the foals.
Area of Science:
- Veterinary Medicine
- Equine Health
- Endocrinology
Background:
- Hyperplastic goiter is a condition characterized by the enlargement of the thyroid gland.
- Thyroid hormones are crucial for growth and development, especially in newborns.
- Foal mortality can be associated with congenital abnormalities and developmental issues.
Purpose of the Study:
- To investigate the cause of hyperplastic goiter in a group of newborn foals.
- To determine the potential link between observed goiter and environmental or dietary factors.
- To identify risk factors contributing to neonatal foal weakness and mortality.
Main Methods:
- Necropsy examinations were performed on seven newborn foals presenting with hyperplastic goiter.
- Clinical signs at birth, including weakness and myxedema, were recorded.
- Gross pathological findings, specifically thyroid gland size, were assessed during necropsy.
Main Results:
- Seven newborn foals exhibited hyperplastic goiter.
- Most foals were weak at birth and died within 48 hours.
- Only one foal displayed myxedema, and thyroid enlargement was evident in only three foals at necropsy.
Conclusions:
- The observed hyperplastic goiter in newborn foals is strongly suggested to be caused by a dietary iodine deficiency.
- Iodine deficiency can lead to significant neonatal morbidity and mortality in foals.
- Further investigation into equine nutrition and iodine requirements is warranted.