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Model of agr-dependent staphylococcal interference. Based on semiquantitative analysis of the aerobic nasal flora, a multiple logistic regression model was used to analyze simultaneously the effect of S. aureus agrSa alleles, Corynebacterium spp., and S. epidermidis agrSe alleles on S. aureus colonization. OR, odds ratio; threshold of 102 CFU for S. epidermidis and 104 CFU for Corynebacterium spp.
