128 APPLIED BACTERIOLOGY 



in handling dead bodies (dissecting porters' warts), are of 

 tubercular origin. Fortunately, in man these lesions rarely 

 spread, and remain local or heal altogether, while in sus- 

 ceptible animals (rats, mice, guinea-pigs) an inoculation 

 produces general tuberculosis in the course of a few weeks. 



In some cases of leprosy the tubercle bacillus is associated 

 with the Bacillus leprce, while lupus, scrofula, and possibly 

 scurvy, are all due to the Bacilhis tuherculosis. 



The partial immunity enjoyed by the Jews is remarkable, 

 nor has any sufficient reason yet been assigned for it ; it is 

 perhaps partly due to the care taken of their meat-supply, 

 and partly to the fact that much of their food is cooked in 

 oil or fat. 



Dr. Marshall "Ward has proved that tubercle bacilli are 

 present in the atmosphere of a hospital for phthisical 

 patients by suspending glass plates covered with glycerine 

 in an extraction- shaft of the Brompton Hospital. Other 

 • observers have demonstrated the presence of the bacillus 

 in the dust of rooms occupied by phthisical patients. 

 In health-resorts much frequented by phthisical patients, 

 the chances of infection by inspiration of tubercle containing 

 dust are considerable, and it often happens that thoughtless 

 or ignorant persons needlessly expose themselves to the risk 

 of tubercular infection. Medical men should make a point 

 of impressing on phthisical patients and their friends the 

 infective character of the disease, which is not fully recog- 

 nised, principally on account of the long time for which, as 

 pointed out above, the disease may be latent. 



In Germany and New York special regulations are in 

 force, and the disease is classed among those subject to 

 compulsory notification ; it will be a matter of deep interest 

 to see what success attends the somewhat stringent 

 measures which are being carried out in New York. 



Koch's Tuberculin Treatment. — This remedy, though it 



