Prevalence of Actinomyces israelii, A. naeslundii, Bacterionema matruchotii, and Candida albicans in Selected Areas of the Oral Cavity and Saliva

In Vitro Activity of Amoxicillin, Clindamycin, Doxycycline, Metronidazole, and Moxifloxacin Against Oral Actinomyces

“…They are commonly isolated from the gastrointestinal tract and from the female genital tract in humans. Actinomyces are normal inhabitants of the oropharnyx, tonsillar crypts, and gingivodental crevices (2,3) and have pathogenic potential in infected root canals, periapical lesions, and endodontically treated teeth with apical periodontitis (4 -6). Actinomyces was found to be among the four most common genera present in canals with periapical radiolucencies (4).…”

Microorganisms associated with production lots of the nucleopolyhedrosis virus of the gypsy moth,Lymantria dispar [Lep.: Lymantriidae]

“…Its introduction into the NPV production line is unexplained, Actinomyces naeslundii was isolated from 11 NPV samples. This microorganism is an opportunistic pathogen, but its normal habitat is the oral cavity of man (Howell et al, 1962). Thus, its appearance in the products is likely" from worker contamination, but it is of no particular concern.…”

Characterization of a dextranase produced by an oral strain of Actinomyces israelii

“…An alternate explanation is that dextranase production by A. israelii constitutes a contribution to a symbiotic relationship established in the complex milieu of dental plaque. A. israelii is often recovered from the plaque of healthy individuals (26,27,40), and production of dextranase by selected strains may enhance the microbes' ability to maintain itself in plaque through association withthe dextran-forming microorganisms. In preliminary experiments, we recovered dextranase-producing microbes resembling A. israelii about 60% of the time from the plaque of elementrary school children (R. Staat and C. Schachtele, unpublished data).…”