Effect of 200 Roentgens Fractional Whole Body Irradiation in the Burro

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Abstract
A study was made of the response of the burro to 200 r fractional Co60 gamma ray whole body irradiation. The response is similar to, but slower than, that observed with a daily dose of 400 r. The platelet response to irradiation with 200 r daily corresponded most closely the picture after, an acute LD50 dose and was correlated with the bleeding tendency which developed on the 9th irradiation day. A significant hyperferremia was observed in the burro one hr. after a total dose of 600 r but the max. response was not obtained until 1800 r had been administered. Most animals had significantly elevated plasma Fe values prior to exitus.