302 



BULLETIN No. 161 

 TABLE 6 Continued. 



[November, 



Author 



Date 



Conditions 



Not killed 



killed 



Heymann 50 

 (continued) 



Gotschlich : 



Hill 60 



1903 



1903 



Noetel 105 



1904 



Cadeac 18 



Kirstein 69 



1905 



1905 



Dust from rooms of consumptives: 

 Samples taken on a brush 



No. of No. of Percent 

 samples positive positive 

 Private rooms 59 5 8.5 



Hospitals 61 5 8.2 



Samples taken on a moist sponge 

 Private rooms 57 9 15.78 



Hospitals 62 25 40.3 



Total sa'ples 239 44 18.4 



Hospitals 123 30 24.3 



Pri'te homes 116 14 12.0 



No tubercle bacilli were found in 119 



samples of dust taken from 15 



places where consumptives were 



in the habit of visiting. 



Samples of tuberculous sputum from 



10 rooms, using 496 swabs, were 



, taken by rubbing them on carpet, 



furniture, etc. In 8 of the 10 



cases the sputum was proven to 



contain tubercle bacilli from 



stained preparations; the other 



two were not tested. Tubercle 



bacilli dried on glass rods were 



dead after 16 days. 



Clothing that had been and that was 

 being worn daily by consumptives 

 was enclosed in a large box of 

 three cubic meters content. The 

 dust was beaten and shaken out 

 and allowed to settle; then it was 

 collected and thoroly rubbed 

 up in 5 cc. of broth. The original 

 material, and dilutions of .1 and 

 .01 were respectively injected 

 into guinea pigs: 



Coat and vest worn daily 



Jacket and hose worn daily 



New jacket, hose and old vest with 

 no evidence of contaminated 

 sputum. 



Old coat 



Coat, hose and plush vest, none 

 worn for three weeks 



Wool jacket and old hose, not worn 



for five weeks 



Tuberculous sputum exposed on glass 



to air and light 



Tuberculous sputum, in thick layers 



dried on a marble slab 



Tubercle bacilli from pure culture or 

 from tuberculous sputum were 

 sprayed upon collected dust, and 

 then after different lengths of 

 time tested for virulence by inoc- 

 ulation of guinea pigs. Dust from: 



Positive 

 Positive 



Negative 

 Positive 



Positive 

 Positive 

 2, 4 and 6dys, 



4,6andlOdys. 

 14 days 



