Abstract

SUMMARY The presence of ultraviolet-inactivated Sendai virus increased the transfer of Marek’s disease virus from infected to uninfected cultured chick kidney cells. This effect was seen after incubation of infected and uninfected chick kidney cells in the presence of ultraviolet-inactivated Sendai virus at 4°. There was only a slight further increase in transfer of infection with subsequent incubation at 37°. The close apposition of infected and uninfected cells occurring during the agglutination produced by treatment with ultraviolet-inactivated Sendai virus in the cold, rather than complete cell fusion may have been the main means by which treatment with ultraviolet-inactivated Sendai virus increased the transfer of infection.

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