DISEASES AND PARASITES OF FOWLS 



387 



NORMAL HEN'S OVARY 

 (Courtesy, Storrs Experiment Station.) 



of vigor. Incubators 

 that have not held the 

 temperature steady or 

 have not supplied the 

 proper moisture condi- 

 tions, will hatch chicks 

 of low vitality. Such 

 chicks are susceptible to 

 bacterial and other dis- 

 eases that would not 

 affect strong, vigorous 

 chicks. Small chicks are 

 always very susceptible 

 to environmental condi- 

 tions, and where these conditions are found to be unfav- 

 orable it is quickly evident in the death-rate of the 

 chicks. 



White Diarrhoea (Bacterium pullorum). From recent 

 investigations, it is clear that bacteria are responsible for a 



large part of the chick 

 mortality. A certain 

 germ, bacterium pullo- 

 rum, was isolated at the 

 Storrs Station which 

 proved to be the direct 

 cause of what is popu- 

 larly known as white 

 diarrhoea. Diarrhoea is 

 but a symptom of the 

 disease, which should 

 not be confounded with 

 various other kinds of 

 diarrhoea. The germ 

 was found in the fresh 



DISEASED OVARY 



Showing white diarrhoea condition. (Cour- 

 tesy, Storrs Experiment Station.) 



