A comparative study revealed that erythrosin (1.0% and 0.5%) inhibited a variety of microorganisms representative of the oral microflora in contrast to fast green (5.0% and 2.5%), which was essentially devoid of antimicrobial activity. These observations suggest that fast green may be preferable to erythrosin as a disclosing agent for quantitative studies of dental plaque.
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Caldwell et al. (1969) studied this question.
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