169 
Hope, W. E. Report of the Medical Officer of Health, Liverpool, 1897, on tuber- 
culosis as affecting the milk supply of the city. 
Two hundred and twenty-eight samples of milk from town dairies 
were examined and 12, or 5.2 per cent, were found to contain tubercle 
bacilli. Sixty-seven samples from country dairies showed 9, or 13.1 
per cent, with tubercle bacilli. The work was, done by Boyce, Dele- 
pine, Hamilton, and Woodhead. Animal inoculations, intraperitoneal 
or subcutaneous, of plain milk or of the sediment after centrifuging. 
Massone, A. Annali d’igiene sperimentale, 1897, p. 239. (Ref. in Hyg. Rundsch., 
VIII, 1897, p. 605.) 
Examined a large series of samples of Genoa market milk for the 
presence of the tubercle bacillus. Centrifuged TO to 80 cubic centi- 
meters of the mixed milk for 15 minutes, and then injected 5 to 6 
cubic centimeters of a mixture of the cream and sediment into the 
peritoneum of guinea pigs. In 9 per cent of the cases tubercle 
bacilli were demonstrated in the milk by these means. 
Ott. Ein weiterer Beitrag zur Milchhygiene. Zeit. f. Fleisch und Milch- 
hygiene, 1897, VIII, p. 69. 
Examined specimens of mixed market milk for the presence of 
tubercle bacilli. By staining specimens of the milk, treated by a 
special process, he demonstrated tubercle bacilli in 5 out of 43 speci- 
mens. = 11.6 per cent. Guinea pigs were then inoculated intraperi- 
toneally with 5 cubic centimeters of a mixture of cream and sediment 
of centrifuged milk, obtained from the dealers who had furnished 
the tuberculous specimens. 
Speci- 
men. 
Tubercle bacilli microscopic- 
ally. 
Inoculation result. 
I 
A few 
Pig 1 died in 23 days; tuberculous. Tubercle bacilli found. 
Pig 2 killed in 30 days; tuberculous. Tubercle bacilli found. 
II 
+ first examination; — second J 
Both pigs normal after 5 weeks. 
III 
5 per field 
Pig 1 died in 28 days; tuberculous. Tubercle bacilli found. 
Pig 2 died in 35 days; tuberculous. Tubercle bacilli found. 
IV 
Few 
Both killed in 6 weeks. First normal; second tuberculous. 
Tubercle bacilli found. 
V 
do 
Pig 1 died in 40 days; tuberculous. Tubercle bacilli not 
mentioned. 
Pig 2 killed in 40 days; tuberculous. Tubercle bacilli not 
mentioned. 
In another series, 30 specimens of market milk were injected intra- 
peritoneally into 30 guinea pigs, 5 cubic centimeters each. Six ani- 
mals died of intercurrent diseases, only 2, however, too early for the 
development of tuberculosis. 
Four died of tuberculosis, but it was subsequently found that 2 of 
them had received milk from the same dealer. 
To sum up (after making the necessary exclusions), of 27 (author 
says 28) specimens, 3 contained virulent tubercle bacilli, (11.1 per 
cent) (author says 10.7 per cent). 
