ANTHRAX 



105 



Table XXIX. 



-Differential Leucocyte Counts in Experimental Cases 

 of Fowl Typhoid (Taylor) 



In the above table the counts of red cells are given at the time 

 of the greatest diminution while the leucocytes are at the time of 

 the greatest increase. These occur on the same date. Cases I 

 and III recovered. The examinations of the other cases were made 

 No. II six days before death, No. IV the day before death and 

 No. V six days before death. 



ANTHRAX 



In cattle and sheep the blood is extensively invaded by anthrax 

 bacteria a short time before death; in the horse microscopical 

 examination will reveal the bacteria in the blood in the great 

 majority of cases, while in the pig death occurs in a large proportion 

 of cases while the blood is still free from bacteria (M'Fadyean). 

 Diagnosis is most readily and surely made in cattle, sheep and in 

 the majority of horses by making a microscopical examination of 

 the blood. Not finding the anthrax bacteria in cattle and sheep 

 at the time of death warrants stating that the case is not one of 

 anthrax (M'Fadyean). Anthrax bacteria have been found in the 

 circulatory blood of cases that recovered during the early stage 

 of the febrile period. 



The microscopical examination is made of smear preparations of 

 blood (peripheral blood is to be preferred to that from the large 

 vessels), made in the usual way and stained with Jenner's, Wright's 

 or M'Fadyean's methods. Jenner's stain I have found preferable 

 to Wright's, except where the blood is fresh or from an animal 



