Treatment of pregnant mares to prevent abortions due to equine piroplasmosis is a novel idea practised empirically at some Thoroughbred studs in South Africa. This paper presents the results of an investigation to ascertain whether imidocarb dipropionate crosses the equine placenta. Three pregnant mares were injected intramuscularly with imidocarb and their foetuses were mechanically aborted at varying time intervals thereafter. Imidocarb was found in foetal blood at a level similar to that in the dam's blood, suggesting that imidocarb administered to the dam would be available for anti-parasitic activity in the foetal circulation. Uncertainty concerning the time of treatment to achieve the desired effect currently makes this a questionable exercise.
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- - The study investigates the effects of general inhalation anesthesia on pregnant mares during their last month of gestation, focusing on the impacts on both maternal and fetal health.
- - Nine mares were anesthetized for 90 minutes, revealing increased heart rate and arterial pressure, while also showing respiratory acidosis and a decrease in fetal heart rate.
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