DIFFERENTIAL DIAGNOSIS 



121 



especially diarrhea and fowl cholera, are the diseases liable to 

 be mistaken for fowl typhoid. 



A comparison of the important changes in the morbid 

 anatomy in fowl cholera, as described by European writers, 

 and in the disease under consideration, can be made from the 

 appended columns, in which their more characteristic lesions 

 are contrasted : 



4- 

 5- 



6. 



Lesions ill fowl cholera. 



Duration of the disease from a 



few hours to several days. 

 Elevation of temperature. 

 Diarrhea. 



Intestines deeply reddened. 



Intestinal contents liquid, mu- 

 copurulent, or blood stained. 



Heart dotted with ecchvmoses. 



4- 

 5- 



7. Lungs affected, hyperemia or 



pneumonic. 



8. Specific organisms appear in 



large numbers in the blood 

 and organs. 



9. Blood pale (cause not deter- 



mined). 



10. Condition of leucocytes not 



determined. 



7- 



8. 



9- 

 10. 



Lesions in foivl typhoid. 



Duration of the disease from a 

 few hours to several days. 



Elevation of temperature. 



Diarrhea not common. 



Intestines pale. 



Intestinal contents normal in 

 consistency. 



Heart usually pale and dotted 

 with grayish points, due to 

 cell infiltration. 



Lungs normal, excepting in 

 modified cases. 



Specific organisms compara- 

 tively few in the blood and 

 organs. 



Blood pale, marked diminu- 

 tion in the number of red 

 corpuscles. 

 Increase in the number of 

 leucocvtes. 



Attention should be called to the fact that as yet there 

 seems not to have been a careful study of the condition of the 

 blood in fowl cholera. Salmon observed many changes which 

 may have been similar to or identical with those herein 

 recorded. Ward found an increase in the number of white 

 corpuscles and in some cases a decrease in the number of red 

 ones in cases of fowl cholera. 



The difference between the specific organism of these two 

 diseases can be readily appreciated by a comparison ot the 



