Yersinia pseudotuberculosis and ovine abortion.
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Biomedical subjects
Publications and source records attributed to N S Macleod.
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Following accidental overdosage with monensin, nine deaths occurred in a batch of 40, four-to-seven-month-old calves. A description of the incident is given including the findings on post mortem examination. Inaccurate on-farm feed mixing can present problems as was highlighted by this outbreak.
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Tick borne fever is considered to have played a major role in a complex disease syndrome involving mucosal disease and cobalt deficiency in a group of young calves reared on an upland farm in South West Scotland. Anaemia, illthrift, coat colour changes and scour were the main clinical signs.
A blood or yeast dependent pleomorphic Gram-negative bacillus was isolated from the pneumonic lung of a suckled calf which died suddenly. The organism was biochemically similar to American strains of Haemophilus somnus and was shown to be serologically similar by rapid slide agglutination, tube agglutination and micro-complement fixation tests. The possible importance of this organism in disease syndromes in cattle in the United Kingdom is discussed.
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