SYMPTOMS AND DIAGNOSIS 25 



shreds ot blood-stained mucus may be seen in the 

 dejecta. 



The diarrhoea is often intermittent in character, and 

 in some cases appears to recur at more or less regular 

 intervals of about three or four weeks. Between the 

 attacks the animal improves somewhat in condition. 

 We have noticed that the bacilli may be very numerous 

 in the faeces at the height of an attack of diarrhoea, and 

 that as the dung becomes more normal in consistence, 

 they are much less numerous. This point, however, 

 has not been confirmed by the examination of a large 

 number of cases. 



In the more chronic cases, the attacks of diarrhoea 

 seem to vary in intensity. Miessner and Trapp, who 

 have made most careful records of cases of pseudo- 

 tuberculous enteritis, tested the urine in several 

 instances, but found no marked abnormalities. These 

 authors also made blood counts in some cases, but 

 found the normal cells in their usual numbers. They 

 found the milk reduced in quantity; but after pro- 

 longed centrifuging at a high speed they were unable 

 to find any bacilli in the sediment. Their inoculation 

 experiments with centrifuged milk, urine, etc., are 

 described in Chapter IX. 



Symptoms in Sheep. — As has already been mentioned, 

 Johne's disease in sheep has been described in Bosnia 

 by Vukovic and in Great Britain by Stewart Stockman. 

 More recently M'Fadyean, Sheather, and Edwards have 

 reported a case in a Welsh ewe. In Scotland, where 

 the first case of the disease in Great Britain was dis- 

 covered in the investigation of an outbreak of a disease 

 known locally as " Scrapy," the condition is said to be 

 spreading. The following interesting note b}^ Stock- 

 man appeared in the Report of the Board of Agriculture 

 for 1909 : 



