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JAMA. 1939;113(24):2154. doi:10.1001/jama.1939.02800490049015.
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HISTAMINE IN PLATELETS OF RABBITS  From experiments originally intended to demonstrate the changes in blood histamine following vaccine administration, Zon, Ceder and Crigler1 obtained evidence suggesting that it is the platelets which carry major portions of the blood histamine. The rabbits in the experiment were sensitized to a strain of beta-hemolytic streptococcus of low virulence. Following the intravenous administration of 10 cc. of the killed homologous vaccine to sensitized animals and also to nonsensitized controls, blood samples were withdrawn and platelets, white cells and histamine were determined. There was an almost complete disappearance of granulocytic cells following the vaccine with little change in the total histamine content. Further, there was no increase in plasma histamine, which ruled out any shift in histamine from injured white cells to plasma. It was also shown that the administration of antiplatelet serum caused a significant drop in blood histamine generally paralleling the

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