EFFECTS OF EARLY EXPERIENCE ON THE RESPONSE TO TRANSPLANTED TUMOR

Abstract
The purpose of this study was to determine the effect of handling introduced in the immediate post-weaning period on mortality of male and female albino rats arising from implantation at 45 days of age with cells of Walker carcinoma 256. Results indicated that handled rats as a group survived longer than did nonhandled littermate controls. Neither males nor females, when considered separately, lived significantly longer than controls. Autopsies performed on a sample of rats from each group revealed that handled animals had smaller adrenals by percentage weight than did corresponding controls.