The morphology and cultural characteristics of bacteria of the Simonsiella genus isolated from erosions of oral mucosa
are reported here. Direct microscopic examination of smeared oral swabs and the consequent selection of suitable
culturing procedures and media are compulsory for recovering Simonsiella microorganisms from clinical specimens in
routine work.
J Clin Microbiol. 1984 Jun;19(6):931-3.

Isolation of Simonsiella sp. from a neonate  

Simonsiella; New born; Isolation; Stomach; Dental disease; Digestive diseases; Bacteriosis; Scanning electron
microscopy; Observation; Cyst; Optical microscopy; Simonsiella muelleri; Simonsiellaceae; Cytophagales; Bacteria;
Human; Infection;

Journal of clinical microbiology 1987, vol. 25, No. 3, pp. 522-525 (12 ref.)

Cytologic manifestation of an unusual bacterial form, Simonsiella species

Cytologic investigation ; Upper aerodigestive tract ; Bacteriological investigation ; Simonsiella ; Digestive tract ;
Respiratory tract ; Pathology ; ENT disease ; Digestive diseases ; Human ; Simonsiellaceae ; Cytophagales ; Bacteria ;
American society cytology. Annual scientific meeting. 35, New Orleans , INCONNU (1987)
1988, vol. 32, no4, pp. 465-470 (15 ref.)

Isolation of Simonsiella sp. from a Neonate

A member of the genus Simonsiella, presumptively identified as S. muelleri, was isolated from a gastric
aspirate taken from a neonate 15 min postpartum. The neonate showed a dental cyst and early eruption of
teeth, confirmed by mandibular X ray. The morphological features, cultural characteristics, and antimicrobial
susceptibility of the isolate are presented.

Members of the genera Simonsiella and Alysiella are gram-negative bacteria with unusual morphology and motility.
They are commonly described as filamentous with gliding motility (4). Their normal habitat is the oral cavity of
a wide range of warm-blooded vertebrates (4, 7). The ecological role of these organisms is unclear. These bacteria
have been considered members of the normal flora (4; D. A. Kuhn, D. A. Gregory, J. Pangborn, and M. Mandel, J. Dent.
Res 53[Special issue]:108, 1974) and reported as isolates from erosive lesions of the oral cavity (1), but often are not
even mentioned as part of the oral microflora (11). A recent survey, in which simonsiellas were detected in normal
mouths of 32% of 212 human subjects between the ages of 4 and 80 years,