Studies on Oral Filamentous Bacteria: II. Serological Relationships within the Genera Actinomyces, Nocardia, Bacterionema and Leptotrichia

Snyder, Marshall L.; Slawson, Marie S.; Bullock, Wesley W.; Parker, R. B.

doi:10.1093/infdis/117.4.341

Cited by 17 publications

(8 citation statements)

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“…Gilmour et al (I 96 I) classified the genus Bacterionema in the order Actinomycetales, family Actinomycetaceae because of its mycelial growth and Gram-positive filamentous morphology, though they did point out that it differed extensively from the two existing genera Actinomyces and Nocardia. However, although the genus has subsequently been found to form a recognizable taxonomic entity on the basis of numerical phenetic and sero-logical data (Melville, 1965;Snyder et a!., 1967;Holmberg & Hallender, 1g73), its generic location is unsettled. Pine (1970) suggested the family Corynebacteriaceae might be a more suitable niche for B. matruchotii on the basis of its propionic acid fermentation (Howell & Pine, 1961).…”

Section: B Matruchotiimentioning

confidence: 99%

Fatty and Mycolic Acid Composition of Bacterionema matruchotii and Related Organisms

Alshamaony

Goodfellow

Minnikin

et al. 1977

Journal of General Microbiology

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Section: B Matruchotiimentioning

confidence: 99%

Fatty and Mycolic Acid Composition of Bacterionema matruchotii and Related Organisms

Alshamaony

Goodfellow

Minnikin

et al. 1977

Journal of General Microbiology

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“…Moreover, B. matruchotii strains can be separated from other filamentous organisms serologically in agglutination tests (Snyder, Slawson, Bullock & Parker, 1967) and they possess a distinctive wall composition (Davis & Freer,I 960). Although the Bacterionema matruchotii group constitutes a recognizable taxonomic entity its generic location is still unsettled.…”

Section: Numerical Taxonomy Of Gram-negative Pleomorphic Rods 55mentioning

confidence: 99%

Numerical Taxonomy and Laboratory Identification of Bacterionema matruchotii, Rothia dentocariosa, Actinomyces naeslundii, Actinomyces viscosus, and Some Related Bacteria

Holmberg

Hallander

1973

Journal of General Microbiology

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A collection of Gram-positive filamentous and/or diphtheroidal organisms was classified by means of numerical phenetic methods. The collection comprised 76 new isolates from dental plaques, upper respiratory tracts and urinary tracts, and 47 reference strains. The organisms were characterized according to 77 different features. The data were subjected to computer analysis in which the similarity coefficient (S,) and the simple matching coefficient (S,) were calculated and the results of a single-linkage cluster-analysis technique and a minimum spanning tree technique were compared. The two cluster-analysis techniques gave almost identical results, but with the simple matching coefficient a few strains were grouped together on the basis of negative correlations.Fixed levels of agreement were chosen to define genera and species. With the matching coefficient five major clusters were recognized at a similarity level of 87.5 04).These clusters correspond to the genera Corynebacterium, Bacterionema (Leptotrichia), Rothia, Actinomyces and Nocardia. The genera Corynebacterium, Actinomyces and Nocardia each contained a number of species. At an agreement level of 90 the clusters of Bacterionema and Rothia were identical to those at 87.5 yo which means that these genera each contain one species. The reference strains labelled Actinomyces naeslundii and A . ~~iscosus agreed on the 92'5 yo level which means that they form a single species. A 'calculated median organism' for each of these taxo-species is described. A serological grouping by immunofluorescence of all the organisms studied, by means of type-specific antisera to Bacterionema matrrrciiotii, Rothia dentocariosa, A . naeslundii and A . viscosus, corresponded to the numerical grouping. Characters, both constant and discriminative, were selected to form a set of tests useful for clinical laboratory identification of this group of bacteria. I N T R O D U C T I O NBacterionema matruchotii, Rothia dentocariosa, Actinomyces naeslundii and A. viscosus are Gram-positive pleomorphic organisms recoverable from the human oral cavity and other human habitats

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“…Exposure to stress conditions causes the latter to adopt pleomorphic forms, including the bifid form. These observations were confirmed by Rodella (1908), Cruickshank (1925), Roos (1927), and Synder et al (1967) who reported that the alternative forms are uncommon and give an illusion of branching. Norris et al (1950) confirmed that stress conditions induce the polymorphic forms of Bifidobacterium .…”

Section: Introductionmentioning

confidence: 56%

Bifid Shape Is Intrinsic to Bifidobacterium adolescentis

et al. 2017

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Although the genus Bifidobacterium was originally named for its bifid morphology, not all bifidobacterial species have a similar structure, and very few of them adopt a bifid shape under stress conditions. The exposure of respective bifidobacterial species to various conditions, such as different pH, temperatures, medium components, in vivo growth in Caenorhabditis elegans, and subculture, did not affect their diverse morphologies. Extensive scanning electron microscopy studies suggested that the bifid shape of B. adolescentis are maintained irrespective of the conditions. Hence, we conclude that the bifid morphology is intrinsic to B. adolescentis. Most bifidobacterial species are anaerobic and rod-shaped, whereas, after the first generation, they become microaerophilic or aerophilic. CaCl2 (treatment of B. animalis) signaling triggered a change from the rod shape to the bifid shape and vice versa in B. adolescentis.

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Studies on Oral Filamentous Bacteria: II. Serological Relationships within the Genera Actinomyces, Nocardia, Bacterionema and Leptotrichia

Cited by 17 publications

References 0 publications

Fatty and Mycolic Acid Composition of Bacterionema matruchotii and Related Organisms

Fatty and Mycolic Acid Composition of Bacterionema matruchotii and Related Organisms

Numerical Taxonomy and Laboratory Identification of Bacterionema matruchotii, Rothia dentocariosa, Actinomyces naeslundii, Actinomyces viscosus, and Some Related Bacteria

Bifid Shape Is Intrinsic to Bifidobacterium adolescentis

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