Bdellovibrio


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Bdellovibrio

[‚del·ə′vī·brē‚ō]
(microbiology)
A genus of bacteria of uncertain affiliation; parasites of other bacteria; curved, motile rods with a polar flagellum in parasitic state; in nonparasitic state, cells are helical.
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Other topics include the regulation of cell polarity in motility and cell division in Myxococcus xanthus, microbiota-based therapies for Clostridium difficile and antibiotic-resistant enteric infections, the critical roles of polysaccharides in gut microbial ecology and physiology, predator versus pathogen: how predatory Bdellovibrio bacteriovorus interfaces with the challenges of killing gram-negative pathogens in a host setting, and variant gene expression and anti-gene variation by malaria parasites.
1-The Surface structures protect bacteria from harmful enzymes (S-layers from Bacillaceae were found to function as adhesion sites for cell-associated exoenzymes) and antimicrobial agents; 2-The Surfaces structures protect bacteria from changes in pH; 3-The Surface structures protect bacteria from attack by bacterial parasites such as Bdellovibrio bacteriovorus, and from bacteriophages; 4-The Surface structures can function as an adhesin, enabling the bacterium to adhere to host cells and environmental surfaces, colonize, and resist flushing; 5-The Surfaces structures may contribute to virulence by protecting the bacterium against complement attack and phagocytosis, and 6-The Surface structures may act as a as a coarse molecular sieve.
The first established that isolates of two antibiotic-resistant ocular pathogens, Pseudomonas aeruginosa and Serratia marcescens, were all susceptible to being attacked and killed by at least one of two other bacteria , Micavibrio aeruginosavorus and Bdellovibrio baceriovorus, which act as predators against the pathogens but are believed to be "good," or non-infectious, bacteria when they exist within the human body.
That study used the predatory bacteria Bdellovibrio baceriovorus 109J, B.
Bdellovibrio Bacteriovorus is a gram negative, obligate aerobic bacteria which preys on pathologic gram negative bacteria, thus acting as a predator in preying the periodontal pathogens like Aggregatibacter actinomycetemcomitans.
In addition, an uncommon group of bacterial genera including Rhodopseudomonas, Bdellovibrio, Opitutus, Spartobacteria, Leptothrix, and Nitrospira were identified.
John Tudor, of the Biology Department, on a scholarly project, "Isolation of Genes Necessary for Predation in Bdellovibrio bacteriovorus.
A symbiont of the tick Ixodes ricinus invades and consumes mitochondria in a mode similar to that of the parasitic bacterium Bdellovibrio bacteriovorus.
Bacteria within biofilms may be subject to predation by free-living protozoa, Bdellovibrio spp.
Researchers at the University of Nottingham found that Bdellovibrio reduced the numbers of Salmonella by 90 percent and the birds remained healthy, grew well, and were generally in good condition.
Subdivision Fantily Genus [alpha]-Proteobacteria Bradyrhizobiaceae Bradyrhizobium Hyphomicrobrobiacae Hyphomicrobium [beta]-Proteobacteria Commamonadaceae Curvibacter Rhodoferax Burkholderiaceae Polynucleobacter Methylophilaceae Methylophilus Neisseriaceae Chitinibacter Rhodocyclaceae Dechloromonas [gamma]-Proteobacteria Aeromonadaceae Aeromonas Enterobacteriaceae Escherichia / Shigella Yersinia Moraxellaceae Acinetobacter Shewanellaceae Shewanella [delta]-Proteobacteria Bdellovibrionaceae Bdellovibrio Acidobacteria Acidobacteriaceae Gp3 Gp4 Gp8 Actinobacteria Microbacteriaceae Cryobacterium Propionibacteriaceae Propionibacterium Bacteroidetes Bacteroidaceae Bacteroides Flavobacteriaceae Cloacibacterium Flavobacterium Chloroftexi Caldifneacea Caldilinea sp.