Abstract
Conclusions
A study of aureomycin, chloramphenicol and para-aminobenzoic acid in myxoma virus and vaccinia virus infection in the chick embryo failed to show any chemo-therapeutic or chemoprophylactic action of these agents, either when they were used alone or in combination. In agreement with others, we also found that aureomycin, when introduced onto the chorioallantois, appeared to be toxic for the chick embryo.
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