Bdellovibrio †,

Proteobacteria
Deltaproteobacteria
Bdellovibrionales
Bdellovibrionaceae
Henry N. Williams

Henry N. Williams

Dental School, University of Maryland at Baltimore, Department of OCBS, Baltimore, MD, 21201-1510 USA

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Marcie L. Baer

Marcie L. Baer

Shippensburg University, Biology Department, Shippensburg, PA, 17257 USA

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John J. Tudor

John J. Tudor

St. Joseph's University, Department of Biology, Philadelphia, PA, 19131-1308 USA

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First published: 14 September 2015
Stolp and Starr 1963, 243AL §
Published by John Wiley & Sons, Inc., in association with Bergey's Manual Trust.
§
Editorial Note: The previous edition of Bergey's Manual of Systematic Bacteriology described three species of Bdellovibrio: B. bacteriovorus, B. starrii, and B. stolpii (Burnham and Conti, 1984). However, the authors acknowledged that variability in physiological, biochemical, and genetic properties stressed the single-genus concept for these organisms. As a result of these and other differences revealed more recently by molecular studies, two of the species, B. starrii and B. stolpii, have been reclassified into a new genus, Bacteriovorax, to be described in the following chapter.

Abstract

Bdel.lo.vib' ri.o. Gr. n. bdella leech, sucker; M.L. masc. n. Vibrio a generic name; M.L. n. Bdellovibrio a leechlike vibrio.

Proteobacteria / Deltaproteobacteria / Bdellovibrionales / Bdellovibrionaceae / Bdellovibrio

Vibrios, 0.20–0.4 × 0.5–1.4 μm. Motile by a single, polar, sheathed flagellum. Gram negative. Prey upon Gram-negative bacteria. Have a predatory lifestyle characterized by two distinct phases, a free-living attack phase and an intraperiplasmic growth phase (Figure 1). Prey-independent mutants that have lost their requirement for prey cells occur spontaneously and can be isolated in the laboratory. Some of these prey-independent mutants retain the ability to grow predaciously and are considered to be facultative with respect to their requirement for prey cells. Aerobic, having a strictly respiratory type of metabolism with oxygen as the terminal electron acceptor. Contain cytochromes a, c, and b. Mesophilic. Oxidase positive. Catalase variable. Occur in fresh and salt water, soil, and sewage.

The mol% G + C of the DNA is: 49.5–51 (Torrella et al., 1978).

Type species: Bdellovibrio bacteriovorus Stolp and Starr 1963, 243.

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