Epidemiological study with the mare and Neotyphodium coenophialum toxins
DOI:
https://doi.org/10.33584/rps.13.2006.3114Abstract
The objective of this study was to relate chemical components of pastures containing tall fescue suspected to be causative to reduced conception and early embryonic death in the mare. Pasture sampling was conducted on 143 pastures and over 500 sites during mare breeding. Tall fescue was 16- 42% of the forage in most pastures and about 65% of the plants were infected with Neotyphodium coenophialum. Ergovaline content ranged from 0 to 2220 ng/g. Lysergic acid was present in equal or lesser amounts than ergovaline. Approximately 10% of the mares did not conceive or had early foetal loss. Because of other components in the diet, a direct cause/effect relationship cannot be made between mare response and N. coenophialum related toxins. These results suggest that a large number of animals will be required when designing an experiment to show how tall fescue might affect reproduction in mares. Keywords: horse pastures, alkaloids, minerals
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