CHAPTER III 



NORMAL BLOOD IN THE SEVERAL SPECIES OF THE 

 DOMESTICATED ANIMALS 



Different investigators have reported widely varying results of 

 the examination of the blood of normal animals. More examina- 

 tions have been made of laboratory animals, — dog, rabbit and 

 guinea pig. Consequently what is the normal for these animals is 

 1 icttcr known than for other domesticated animals. More work 

 is needed to determine the normal for the majority of the domes- 

 ticated animals, especially for the numbers and percentages of the 

 several varieties of leucocytes. 



For convenience in reference the normal condition of the blood 

 is presented in tabular form for each species — horse, cow, sheep, 

 goat, dog, cat, swine, rabbit, guinea pig and domestic fowl with 

 references to the investigators who have worked with each species. 



HORSE 



There is considerable normal variation in the number of red 

 corpuscles in the horse. The normal number for the stallion is 

 from 7 to 10 millions per cmm. with an average of 8 to 8^ mil- 

 lions; for the gelding 5}/} to 9 millions with an average of 7J/£ to 

 8 millions; for the mare 5^ to 73^ millions with an average of 

 6J^2 to 7 millions. Perhaps observations on a large number of 

 normal horses will show that the smaller numbers, those below 

 6 millions, are not of strictly normal animals. 



The hemoglobin varies fully as much as the red corpuscles. 

 Moore, I hiring and Cady give the normal as 85 to 100 with an 

 average of 94. Wctzl found the normal to be from 62 to 80. 

 Sabrazes, Muratet and Durroux give the normal as from G8 to 84. 

 More examinations of the hemoglobin of healthy horses are needed. 



Prus gives the number of blood plates as .")()(),()()() per cmm. 



The normal number of leucocytes seems to be from 5,000 ti> 

 10,000 with the average about 8,000. Widely varying results are 

 reported by different investigators. Wiemlieck found differences 



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