Spontaneous Mammary Tumors: Decrease of Incidence in Mice Infected with an Enzyme-Elevafing Virus

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Science  30 Sep 1966:
Vol. 153, Issue 3744, pp. 1657-1658
DOI: 10.1126/science.153.3744.1657


Mice infected with a virus which causes increased activity of lactate dehydrogenase, and of other enzymes in blood plasma, had a significantly lower incidence of spontaneous mammary carcinoma than did controls. When the experiment was terminated at 18 months, the incidence of mammary tumors in controls was 90 percent, and in infected mice, 53 percent.