NON-SPORING BACILLI 293 



Mouse : General tuberculosis by subcutaneous or 

 intraperitoneal injection, and by feeding. 



Calf, pig, goat, monkey, guinea-pig, horse, cat, and rat : 

 all behave alike to the avian type. It never produces a 

 progressive tuberculosis, but may kill them in a large dose 

 given intravenously. 



Dogs : are immune intravenously. 



Chimpanzee : injected subcutaneously with 50 mgr. 

 showed no lesion on death three years after. 



Vitality in Culture. The bacillus was found alive in cul- 

 ture after 1067 days (nearly 3 years). 



Chemical Properties. The investigators were unable 

 to detect any definite and constant bio-chemical character 

 by which tubercle bacilli of one type can be differen- 

 tiated from those of nother. 



BOVINE TUBERCULOSIS. No further special investi- 

 gation has been taken beyond that recorded in the second 

 Interim Report, where in 30 cases of the natural disease in 

 bovines, only one form or type of Bacillus tuberculosis was 

 found. 



HUMAN TUBERCULOSIS. In all, 128 cases of all 

 forms of tuberculosis in man were investigated. Twenty 

 of these were of lupus, and are treated separately because 

 the recognition of the type of bacillus was surrounded 

 with special difficulties. The 108 cases remaining are 

 tabulated in full in the Report, and briefly in Table I., 

 page 294. 



Of the cases of primary abdominal tuberculosis, the ages 

 at death were as shown in Table II., p. 294. Twenty-four 

 of the deaths were from some form of tuberculosis, the 

 others from non-tuberculous affections. Of 15 of these 

 cases, in which a plurality of lesions were examined on 

 exactly parallel lines, 9 yielded none but human tubercle 

 bacilli. In 12 cases in which a single lesion in each instance 

 was examined (mesenteric glands in II, cervical gland in 1), 

 4 yielded human and 8 bovine tubercle bacilli. Two cases 

 yielded mixed human and bovine types, in one from the 

 mesenteric glands alone, and in the other, also from the 

 retroperitoneal glands. 



The cervical gland cases show 3 bovine infections out of 



