Bdellovibrio

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.

Metagenomic Analysis of a Continuous-Flow Aerobic Granulation System for Wastewater Treatment

“…Overall, EPS-producing genera account for approximately 50% of all identified genera in the 8-chamber PFR, compared to only 5% in the AS samples. Other genera more abundant in the 8-chamber PFR than in the AS include Bdellovibrio , which are motile and flagellated [ 49 ], and Novosphingobium , which are non-filamentous bacteria known to form microcolonies [ 50 ] and have high CSH [ 51 ].…”

“…Overall, EPS-producing genera account for approximately 50% of all identified genera in the 8-chamber PFR, compared to only 5% in the AS samples. Other genera more abundant in the 8-chamber PFR than in the AS include Bdellovibrio, which are motile and flagellated [49], and Novosphingobium, which are nonfilamentous bacteria known to form microcolonies [50] and have high CSH [51]. Principal coordinate analysis (PCoA) based on bacterial abundances was conducted to identify the pattern of microbiomes developing in the chambers of each SBR system (4, 6, and 8 chambers) and in the AS control (Figure 4).…”