Abstract
Many reports describing the normal leucocytic findings in the abbit have been published. (Pearce and Casey, 1 Bushnell and Bangs, 2 Kleineberger and Carl. 3 ) The estimations of these workers are tabulated below:
The findings of Scott and Simon and of Cunningham, Sabin, Sugiyama and Kindwall are cited by Pearce and Casey.
In our observations upon the normal count of rabbits, the blood from the marginal ear vein of 27 normal full grown rabbits, mostly males, was employed. Two hundred counts were made from these animals, and the following estimations obtained :
While estimating these total leucocytic counts, it was noted after several counts had been made on successive mornings that an afternoon check made on the third day showed in some of the animals a very marked increment in the number of white blood cells. Without any apparently sufficient reason, the count made in the afternoon from the ear which had been used to collect the blood, would rise from 15,000 to 25,000 cells per cu.mm. The blood collected from the opposite ear at the time of these increased counts would show a normal result, i. e., a difference of 7,000 to 17,000 cells, with no change in the differential count.
While it is to be expected that any frank inflammatory reaction in a given area will yield a local accumulation of leucocytes with a neutrophilia, it is to be noted that in these animals the ears appear normal and present no cardinal signs of inflammation, and that the blood was collected from the circulatory venous system and not from the more diffuse capillary network.
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