An 86-year-old woman with diabetes mellitus and severe decubitus at the sacral and calcaneal regions stemming from poor daily activity was diagnosed with pyometra perforation caused by Actinomyces. No foreign materials, including an IUD, were found inside the uterus. Pyometra is usually caused by Enterobacteriaceae or anaerobes derived from the gastrointestinal tract. The virulence of Actinomyc...

Actinomyces naeslundii is an important early colonizer in the oral biofilm and consists of three genospecies (1, 2 and WVA 963) which cannot be readily differentiated using conventional phenotypic testing or on the basis of 16S rRNA gene sequencing. We have investigated a representative collection of type and reference strains and clinical and oral isolates (n=115) and determined the partial ge...

Five strains of Prevotella intermedia were examined for their ability to coaggregate with various gram-positive and gram-negative species of oral bacteria. Two of the P. intermedia strains coaggregated with selected Actinomyces species, P. intermedia 27 with Actinomyces viscosus T14V and Actinomyces naeslundii ATCC 12104, PK606, PK984, and PK947, and P. intermedia 113 with Actinomyces odontolyt...

Recent advancements in chemotaxonomic and molecular biology-based identification methods have clarified the taxonomy of the genus Actinomyces and have led to the recognition of several new Actinomyces and related species. Actinomyces-like gram-positive rods have increasingly been isolated from various clinical specimens. Thus, an easily accessible scheme for reliable differentiation at the spec...

Actinomyces odontolyticus and A. viscosus are designated as group E and group F in the serological grouping of the Actinomyces.

Whole-organism protein electrophoresis was used to compare and group unidentified coryneform bacteria resembling Gardnerella vaginalis and various Actinomyces and Arcanobacterium species. The obtained clusters of strains were further characterized by whole-cell fatty acid analysis and a variety of biochemical tests. Species-specific oligonucleotide probes based on 16S rRNA gene sequences were d...

Peritonitis is one of the most frequent complications in peritoneal dialysis (PD) patients. Most of them have a bacterial origin, especially gram-positive microorganisms. Actinomyces peritonitis is rare in PD patients, in spite of being part of the normal flora in the oral cavity, gastrointestinal and genital tracts [1]. Actinomyces is a filamentous gram-positive bacterium that lives in aerobic...

Here, we present the complete genome sequence of Actinomyces naeslundii strain ATCC 27039, isolated from an abdominal wound abscess. This strain is genetically transformable and will thus provide valuable information related to its crucial role in oral multispecies biofilm development.

different types of actinomyces spp isolated from the oral cavity of human in healthy as well as in pathological state. internally it is only found in association with pathological organs. recently actinomyces naeslundii has been isolated from blood culture of a leukemic patient. present studies indicate the association of this microorganism with cells obtained from bone marrow by punction in mo...