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Page count: 307

Dental caries (decay) in humans occurs most frequently in sites such as pits and fissures which have restricted access to the saliva and hence lower sustained pH levels than dental sites with greater salivary access. Aciduricity, the ability to metabolize and grow at low pH levels, has been proposed to be a potentially pathogenic attribute in plaque bacteria such as Streptococcus mutans and oral lactobacilli, which have been implicated in the initiation and progression of caries. Data on the relative