ELEVENTH ANNUAL YEAR BOOK— PART X 543 



Vigilanl preventive measures are necessary to keep a herd clean 

 where it is* at all exposed to infection. Treatment produces sub- 

 stantial results in diseased herds. A quarantine of two weeks is 

 advisable before introducing new animals into a clean herd. In- 

 fected animals should be promptly isolated and treated. 



Prevention should be carried out along three lines: (1) Segre- 

 gation of the sick from the healthy animals; (2) Close scrutiny of 

 animals that have been exposed to infection; (3) Complete disin- 

 fection of pens, corrals and sheds, as necrosis bacilli will retain 

 its virulence under favorable conditions in and around sheep folds 

 for several years. 



The walls, racks and troughs should be sprinkled with a 5 per 

 cent solution of sheep dip or similar disinfectant. The manure and 

 a portion of the surface of the soil should be removed and the 

 ground sprinkled with a disinfectant. 



Local antiseptics are satisfactory as a treatment if begun in time 

 and applied energetically. In mild cases of the lip and leg form, 

 the scabs and shreds of tissue should be removed with a stick of 

 wood, and three or four times a week a solution of cresol or coal- 

 tar dip, or better, an emollient dressing containing five parts of 

 one of these dips, ten parts of sublimated sulphur, and one hundred 

 parts of mutton tallow, vaseline or lard. In progressive cases, or 

 aggravated, chronic forms a 10 per cent solution of zinc chloride 

 or nitric acid in the strength of one part to seven parts water. 

 Carelessly applied caustic solutions may do more harm than good. 

 Treatment of the venereal form especially demands careful hand- 

 ling. 



Through notice from the inspection service at Omaha of the 

 United States Department of Agriculture, 'we have learned of the 

 persence of necrobaeillosis in Pottawattamie, Shelby, Crawford and 

 Hancock counties during the past year. A shipment of one hun- 

 dred and ninety-seven animals from Crawford county was slightly 

 infected. About four hundred and fifty animals, comprising a 

 shipment from Pottawattamie county, was found to be infected, 

 though not in an advanced form. Two hundred and forty sheep 

 from Shelby county contained infection. These localities were 

 duly visited by representatives of this department and proper 

 investigation made as to origin and progress of the disease. So 

 far as we have authority, quarantine and sanitary measures have 

 been enforced. 



