168 POULTRY DISEASES 



fecalis alcaligenes, Bacillus putridus nonlique- 

 faciens, Streptococci, Micrococcus leteus, Micro- 

 coccus candicans, Micrococcus flavus tardigradus. 



The colon bacillus is ever present in the in- 

 testinal tract of chickens and is found on the outer 

 shell, yet contamination of the egg content by it 

 does not occur. This has led some to think that 

 there may be a substance present in the egg canal 

 bactericidal for this germ and the matter is being 

 investigated at present. 



Poppe claims that among those germs which find 

 their way through the pores of the egg shell after 

 it is layed is the Bacillus paratyphosis, the cause 

 of paratyphoid in man. 



