JUVENILE TUBERCULOSIS 



385 



cow, irrespective of the site of the disease, whether in the 

 udder or in the internal organs." 



Eraser directed attention to the frequency of the bovine 

 type of bacillus in the tuberculous lesions of bones and 

 joints in children. Eastwood and Griffith l investigated 

 the characteristics of the tubercle bacilli in 261 cases of 

 human bone and joint tuberculosis with the following 

 results : 



The percentages of " bovine " cases are : 



All ages (55 out of 261). . . 21 -1 per cent. 

 Under 10 years (45 out of 155) . 29 per cent. 

 Over 10 years (10 out of 106) . 94 per cent. 



Only three of the above patients yielding the bovine 

 type of bacillus were over 16. In the cervical gland 

 tuberculosis of children under 10 years of age, 72 per 

 cent, yield the bovine bacillus. 2 Novick 3 isolated the 

 tubercle bacillus from forty-eight cases of tuberculous 

 meningitis, of which three proved to be of the bovine 

 type. 



From the foregoing summary, it is evident that a 

 considerable amount of tuberculosis in childhood is due 

 to infection with the bovine type of bacillus. In the 



1 Journ. of Hygiene, vol. 15, No. 2, 1916, p. 25. 



2 Griffith, Lancet, 1917, vol. 1, p. 216. 



3 Journ. of Med. Research, xli, 1920, p. 239, 



M.B. 25 



