Abstract
Summary
1. Pigs irradiated with 350 r bilaterally at the rate of 11 r per minute 9 feet from source survived an average of 254 hours. 2. A moderate Vit. A deficiency had no effect on irradiation damage; in fact, the Vit. A low pigs lived an average of 2 days longer. 3. Pigs fed low levels of Vit. A and with very low liver and blood Vit. A levels showed no gross manifestations of a deficiency of Vit. A. Feed intake and growth rate were fairly normal. 4. Irradiation lowered the total white blood cell count rapidly. 5. The major symptoms of irradiation damage were: (a) depression, (b) skin hemorrhages, (c) hemorrhaging from eyes and mouth, (d) increased respiration, (e) mild muscular spasms just prior to death, (f) extensive hemorrhage of lymph nodes plus varying amounts of hemorrhage in the kidneys, heart, urinary bladder, intestine and stomach.
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