30 POULTRY DISEASES 



may be mixed with the whitewash and applied at 

 the same time; thus saving one operation. Use 

 two pounds of the crude carbolic acid to each five 

 gallons of the whitewash. Cresol, another of the 

 coal tar products, gives satisfactory results in 

 two per cent solution (one pint to six gallons of 

 water). Pure carbolic acid is rather too ex- 

 pensive for this sort of disinfection ; if used, a five 

 per cent solution (one pint to two and one-half 

 gallons of water) should be employed. Kreso 

 and Kreso dip (Parke, Davis & Co., Detroit) ; 

 Zenoleum (Zenner Disinfectant Co., Detroit) ; 

 Liquor Cresolus Compositus (U. S. P.) ; Creolin 

 (Pearson) ; and many other disinfectants may be 

 substituted for the crude carbolic acid. 



Heat is one of the most reliable of disinfectants. 

 It may be utilized in poultry house disinfection 

 in the form of a flame from a gasoline blow torch. 

 Every portion of the walls, ceiling, floor, roosts, 

 nests, boxes, etc., must be carefully flamed. 



This method, although tedious, is eif ective. Used 

 with ordinary care, it is devoid of danger to the 

 operator or building. 



Disinfection of Yards.— A complete disinfection of 

 poultry yards and runs, that is, a destruction of all 

 the disease germs and parasites with which it 

 may be contaminated by an infected flock, is 

 scarcely possible by the ordinary means employed 

 in poultry house disinfection. Fortunately it is 

 seldom necessary. 



When it is remembered that the germs of nearly 

 all diseases, and the eggs of nearly all internal 

 parasites of poultry, are eliminated in the dejecta 

 (feces) of affected birds, the danger from con- 

 taminated runs will be better appreciated, and 

 with the realization that each mature hen pro- 



