lis 



FOWL TYPHOID 



the nucleus remains unstained or becomes slightly tinted with 

 blue. Occasionally they contain one or more vacuoles, and 

 the margin is frequently broken. The apparent dissolving- 



away of the red corpuscles 

 has been frequently ob- 

 served, and corpuscles 

 showing the intermediate 

 stages are readily detected 

 in carefully prepared speci- 

 mens. These must be dif- 

 ferentiated from the blood 

 plates. 



The cause of the de- 

 struction of the red cor- 

 puscles is not satisfactorily 

 explained. In his report 

 on fowl cholera, Salmon il- 

 lustrates leucocytes sur- 

 rounding the red corpus- 

 cles, but the marked di- 

 minution of the red cells 

 was not determined. He 

 speaks, however, of the 

 pale color of the blood. In fresh preparations of the blood, 

 portions of red cells may be seen within the leucocytes, those 

 containing spindle shaped granules. The determination of 

 the extent of this mode of destruction of the red corpuscles 

 necessitates further investigation. 



TABI,E SHOWING CHANGES IN THE NUMBER OF CORPUSCLES. 



Fig. 17. Blood from a well advanced 

 case of fowl typhoid showing red 

 corpuscles, blood plates and increase 

 in the number of leucocytes. 



Fowl No. 82, inoculated in the wing vein, February 6. 



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