80 PRINCIPLES AND PRACTICE OF MILK HYGIENE 
with the frequency of the disease in children receiving 
cow’s milk was made. by Sobotta. Of 80 exclusively 
breast-fed children, 17.5 per cent. were infected with 
tuberculosis; of 57 children receiving cow’s milk in addi- 
tion to mother’s milk, 35.1 per cent. were infected, and 
of 30 fed exclusively on cow’s milk 41 per cent. became 
tuberculous.* Mitchell ® examined 72 cases of cervical 
gland tuberculosis in the Children’s Hospital in Edin- 
burgh and found tubercle bacilli of the bovine type in 
65, or 90 per cent. These children came from districts 
in which the cattle are extensively infected with tuber- 
culosis and most of them had been nourished on cow’s 
milk. Of 70 cases of tuberculosis of the bones and joints 
in children examined by Fraser ® in Edinburgh, 41, or 
60 per cent., were due to bacilli of the bovine type and in 
the greater number of cases the history indicated that the 
infection was introduced by cow’s milk. In 261 cases of 
bone and joint disease examined by Eastwood and 
Griffith,”® bacilli of the bovine type were found in 55, or 
21.1 per cent. Of these latter, 29 per cent. were from 
patients under 10 years of age and 9.4 from patients 
over that age. Seventeen cases of genito-urinary dis- 
eases were examined. Bacilli of the bovine type were 
found in three cases of kidney disease in persons 25, 19 
and 20 years old, respectively. Twelve and one-half per 
cent. of the fatal cases of tuberculosis in children under 
5 years old studied by Park and Krumweide™ were 
® Cited by Rievel, Milchkunde, p. 110. 
® Cited by Ostertag, Zeitschr. fiir Fleisch u. Milchhygiene, 
p. 69, No. 3, vol. 24; p. 118, No. 5. vol. 24. 
10 Journal of Hygiene, pp. 257-309, 310-314, No. 2, vol. 15. 
4 Jour. Med. Research, pp. 109-114, vol. 27. 
