Abstract
The antigenic potential of spontaneous malignant melanoma of the Syrian hamster was investigated. Antisera to the tumor were prepared in two groups of rabbits; one group was immunized with tumor homogenate material and the other with tissue cultured tumor cells. The antiserum was absorbed with normal hamster tissue extracts and serum to remove cross-reacting antibodies. The presence of tumor specific antibodies was demonstrated using immunodiffusion and fluorescent antibody staining techniques. Tumor specific antiserum prepared in this manner gave a single precipitin line against tumor tissue in gel-diffusion tests, and showed specific staining of tumor cells in the fluorescent antibody test.
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