Abstract
Conclusion
In 3 series of experiments employing 675 BALB/c, 108 C57BR/cd and 50 C57BL/6 mice, the first of double isografts of EO771 mammary carcinoma acquired an altered enhanced status comparable with that of the second of double isografts and each of the double isografts had 9 times the homotransplantability (24%) of single control isografts (2.7%). Within the conditions of the experiment neither size, nor age of the isograft was of importance. The altered enhanced status was abiding as determined by serial homotransplantability without further treatment.
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