SPECIFIC BACTERIAL REACTIONS 179 



leg and the lumbogluteal regions. After cleansing 

 the skin with alcohol, the needle is to be introduced well 

 subcutaneously and care taken not to pierce the 

 muscular sheaths or to enter a vein. The syringe best 

 adapted for making the inoculations is an all-glass 

 type graduated in minims or, better, fractions of a 

 cubic centimetre, owing to its cleanliness and ease of 

 sterilization (Fig. 17). Reliable pharmaceutical 

 houses supply tuberculin " O. T." in serial dilutions 

 ready for immediate use. If the above technic be care- 

 fully followed, and the patient restricted to bed on the 



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Fig. 17. — All-glass tuberculin syringe, graduated into hundredths of a cubic centi- 

 metre, particularly useful for both diagnostic and therapeutic inoculations. 



occurrence of a reaction, until its disappearance, the 

 test is devoid of danger, even when incipient and 

 latent pulmonary tuberculosis is present. 



The subcutaneous tuberculin test, as stated above, 

 is indicated in all forms of localized tuberculosis, when 

 the diagnosis is in doubt. Among these lesions may be 

 enumerated tuberculous ulcerations of the skin, lym- 

 phadenitis, osteitis, synovitis and arthritis, laryngitis 

 and tracheitis, phlyctsenular conjunctivitis, keratitis, 

 iritis, uveitis, nephritis, prostatitis, seminal vesiculi- 

 tis, epididymitis, peritonitis and pulmonary tuber- 

 culosis. 



