Answers are grounded in this paper and cite their sources.
Summary: A number of R factors have been shown to determine resistance to fusidic acid, an antibiotic effective against Gram-positive bacteria. Among several R factors examined for this property only one was fi−; the remainder were fi+ and of the FII compatibility group.
No takes yet. Share an insight, caveat, or question.
Datta et al. (1974) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: