82 



Diagnosis of Tuberculosis 



[March, 



droxid sol. is added. In the case of a positive reaction, both the 

 fluid and the f oam turn red. 



Moritz Weiss test. To 5 c.c. of urine 10 c.c. of water are 

 added, in order to reduce the intensity of the color. This dilute 

 urine is then treated with 3 drops of o.i percent sol. of potassium 

 permanganate. In the presence of an excess of neutral sulfur, a 

 deep yellow color appears. The reaction is very delicate, but the 

 reading is often made difficult by the deep yellow color of certain 

 specimens of urine, and also because a number of normal urines 

 become more yellowish after addition of permanganate. 



In the first group of tests, 172 cases were examined at random, 

 irrespective of clinical diagnosis or history. The comparative re- 

 sults are given in Table i. 



TABLE I 



Data pertaining to the diaso and Weiss tests for neutral sulfur in normal and 



abnormal urines 



Diagnosis 



Diazo test 



Weiss test 



+ 



Number of 

 cases 



Percentage of positive 

 reactions 



Diazo test Weiss test 



Typhoid 



Clinical tuberculosis. 



Lues 



Diabetes 



Nephritis 



Cholecystitis 



Pneumonia 



Cancer 



Hypothyroidism . . . . 



Gangrene 



Pleural efifusion 



Surgical, with pus*. . 

 Pregnancy, normal . . 



Eclampsia 



Unclassified 



NormaP 



Total . 



8 

 2 

 12 

 

 3 

 3 







4 



2 



o 







20 



16 



I 



20 



37 



14 



7 

 IS 



I 

 6 



S 

 I 



4 

 2 



I 



I 



24 



17 

 2 



32 

 40 



} 38.1 



52.3 



17.8 



21.8 



35 



137 



44 



128 



172 



20.3s 



2S-58 



^ Including appendicitis, Salpingitis, pus tubes, etc. 



2 Included under " normal " are conditions in which there is a certain degree 

 of systemic disturbance, e. g., fractures, hernia, burns, concussions, etc. 



It is evident, from the data in Table i, that over 20 percent of 

 the cases taken at random in the hospital gave positive tests for 

 neutral sulfur in the urine. In order to determine the diagnostic 



