Published online by Cambridge University Press: 15 May 2009
In a previous paper (Williams and Hoy, 1927) it was shown that living and virulent tubercle bacilli could be demonstrated in the faeces of six apparently healthy cows from among a total of 391 which were examined. All these cows were living the normal life of the herds in which they were discovered, and three of them were brought to the Institute in order that a study might be made of the frequency with which tubercle bacilli could be found in their faeces.