16 SPECIAL VETERINARY THERAPY 



sists in irrigating the tracts once each day with a 

 three or four per cent solution of chromium trioxide, 

 following this irrigation every time with one of plain, 

 sterile water. After ten days or two weeks these 

 irrigations are made only every other day, and at 

 proper intervals an iodine solution is used in their 

 place. 



Unless the case is an exceptionally severe one, ail 

 traces of pus and necrotic tissue will have disap- 

 peared at the end of four weeks and only one or two 

 per cent solutions of the chromium salt are then used, 

 and at intervals of three days. About this time, the 

 external surface of the withers also is to be painted 

 every two or three days with tincture iodine U. S. P. 

 It is only very rarely that a case resists this treat- 

 ment and as a rule complete recovery comes in five or 

 six weeks. If autogenous bacterins are used at the 

 same time this can be shortened considerably. 



With this treatment, the surgeon can hasten mat- 

 ters considerably during the first week or two by 

 careful and gentle curettage in the necrotic area, re- 

 moving gently any portions of tissue which are loose 

 or tending to become separated. If the primary in- 

 cision is made full two inches wide, a good opening 

 remains until treatment is terminated, 



