In trials with 64 pigs growing from 37 to 60 kg or from 65 to 88 kg growth rate and food conversion were not affected by either a 10°C or a 20°C range in diurnal air temperature cycle compared with a constant temperature equal to the mean of the cycle when the mean temperatures were optimal. However, with a constant temperature and cycle mean at 6°C above optimum, performance declined with a 20°C range cycle.
Loosmore and Markson in 1961 first reported the adverse effects of aflatoxin in cattle (1). Subsequently, Clegg and Bryson descrilbed an outbreak of poisoning in cattle which was attributed to Brazilian groundnut (peanut) meal (2). In 1963 Allcroft and Lewis reported their findings m the effects of toxic Brazilian peanut meal for calves, cows, and heifers (3). In calves the first symptomatic effect of continuous ingestion of toxic peanut meal was a reduced growth rate followed by severe tenesmus a few days before death. Postmortem examination revealed
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