Abstract
IN the corrected proof of my article, which unfortunately, owing to my absence on leave, did not reach the printers until the article was in press, I had altered the phrase to which Mr. Twort objects to read, “it was generally accepted that laboratory animals could not be infected with Myco. lepraeæ or with Myco. johnei. This correction was made in the reprints. In my original paper1, I gave a summary of Twort's work but also referred to subsequent experiments which had led workers “generally to accept that laboratory animals could not be infected with Myco. johnei”. Owing to the almost complete failure of the subsequent experiments, it has not been possible to study Johne's disease in laboratory animals. It is hoped that by the use of very young animals this will now be possible.
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References
J. Comp. Path., 53, 140 (1943).
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FRANCIS, J. [Letter to Editors]. Nature 152, 450 (1943). https://doi.org/10.1038/152450a0
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DOI: https://doi.org/10.1038/152450a0
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