POULTRY DISEASES AND THEIR TREATMENT 



6. Disinfection 



The important part played by micro-or- 

 ganisms in causing and spreading disease 

 must be understood before the value of dis- 

 infection can be fully appreciated. The 

 poultryman must develop a sense of sight 

 that sees lurking microbes at every turn, 

 especially in unclean corners. Figure 5 

 shows germs revealed by the microscope in 

 the excrement of a bird suffering from 





FIG. 5. HOW DISEASE IS SPREAD 

 Germs of tuberculosis in the excrement of a fowl. (After Edwards.) 



IO 



