Relationship of Blood Pressure to Mortality in Chickens.

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Abstract
Systolic blood pressures were determined on adult chickens at 7-10 months of age in 1950, 1952 and 1954. Records of mortality and egg production were kept until the birds were approximately 19 months of age. The birds were divided into 3 pressure groups: high, median and low. Approximately 30% of birds had high pressure, 30% low pressure and 40% intermediate pressure. The mortality of the hypotensive birds was nearly twice that of the other groups. There were no significant differences in the body weights or egg production between birds of the groups. Gross autopsies did not reveal the cause of the higher mortality in the hypo-tensive birds.

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