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MUTATION, French law. This term is synonymous with change, and is particularly applied to designate the change which takes place in the property of a thing in its transmission from one person to another; permutation therefore happens when, the owner of the thing sells, exchanges or gives it. It is nearly synonymous with transfer. (q.v.) Merl. Repert. h.t.

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The basic assessment is a bacterial reverse mutation test, using a battery of different strains as well as metabolic activation.
The Salmonella typhimurium histidine (his) reverse mutation test is a microbial assay which measures his [right arrow] [his.
Stanley Plotkin's thoughtful overview of the 11 disease-specific chapters annotates new vaccine technologies as well as current issues of debate, such as replacing the live oral polio vaccine worldwide with injectable, inactivated polio vaccine once the eradication program breaks the chain of wild-virus circulation, to avoid reverse mutations and resulting vaccine-associated paralysis.