173 
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 13.4 
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. 
Ij Massone, A. Annali d’igiene sperimentale, 1897, p. 239. (Ref. in Hyg. Rundsch., 
II . VIII, 1897, p. 605.) 
I Examined a large series of samples of Genoa market milk for the 
I I presence of the tubercle bacillus. Centrifuged 70 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 
I peritoneum of guinea pigs. In 9 per cent of the cases tubercle 
bacilli were demonstrated in the milk by these means. 
r 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. 
Both pigs normal after 5 weeks. 
Pig 1 died in 28 days; tuberculous. Tubercle bacilli found. 
Pig 2 died in 35 days; tuberculous. Tubercle bacilli found. 
Both killed in 6 weeks. First normal; second tuberculous. 
Tubercle bacilli found. 
Pig 1 died in 40 days; tuberculous. Tubercle bacilli not 
mentioned. 
Pig 2 killed in 40 days; tuberculous. Tubercle bacilli not 
mentioned. 
II 
III 
-t- first examination; — second. 
5 per field 
IV 
Few 
V 
do 
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). 
