Abstract
Summary
Tumor development and CF antibody responses of monkeys inoculated s.c. and i.v. with various dilutions of Yaba tumor virus were investigated. Tumors developed at different times and at different sites with CF antibodies appearing soon after the development of tumors and attaining final CF titers comparable in all inoculated animals. No antigenic relationship between Yaba virus and monkey pox viruses was found by in vivo challenge, or between Yaba, monkey pox, and vaccinia virus by cross CF and HI tests. The development of viral antigen(s) in tumor cells removed from infected monkeys at weekly intervals was monitored by the FA technique and CF test. Although the FA technique detected the viral antigen earlier, both procedures were equally effective for detection of antigen in tumors removed 4 or more weeks postinfection.
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