Viridans streptococci associated with periapical dental abscesses

Viridans streptococci isolated in apparently pure culture from periapical dental abscess have been examined. It has been found that each abscesses is associated with only one type of a given species of Streptococcus. The distribution of types of Strep. mitis found in abscesses differed from the distribution in healthy mouths, but no particular type occurred significantly more often in abscesses than in mouths.