CANINE PIROPLASMOSIS 



123 



It has been found by Hibbard and Neal that there are changes 

 present in the blood in mild chronic cases of Texas fever, as in 

 cattle raised within tick infested regions or that have been im- 

 munized by having mild attacks of the disease. The red cor- 

 puscles and hemoglobin are diminished by mild attacks, but 

 increase to normal or nearly so after a time. The leucocytes are 

 increased and remain higher than normal. The increase is mostly 

 in the lymphocytes. Examinations of 41 cattle in the general 

 herd of the Mississippi Agricultural College showed the red cor- 

 puscles 4.5-7.8 millions, average 6.05; the hemoglobin 50-98, 

 average 83; and the leucocytes 4880-26,220, average 12,360. The 

 varieties of leucocytes were: lymphocytes 3,218-24,622, average 

 9,578; the large mononuclears 0-851, average 155; the poly- 

 morphonuclears 440-5,052, average 1,456; the eosinophiles 60- 

 3,320, average 947 and the mast cells 0-249, average 59 per cmm. 



The following table shows the results of examinations of five 

 yearling heifers before treatment and after inoculation with Texas 

 fever organisms. The animals had recovered from three attacks 

 and been passed on as in good condition a month before the 

 second examination (Nov. 18th) was made. 



Table XXXVI. — Examinations of the Blood of Five Yearling Heifers 

 Immunized to Texas Fever (Hibbard and Neal). 



CANINE PIROPLASMOSIS (MALIGNANT JAUNDICE IN THE DOG) 



The specific cause of this disease, Babesia canis, first described 

 and figured in 1895, by Piana and Galli-Valerio in Italy, is a 

 hematozoan found in the blood of diseased dogs. It occurs mostly 



