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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Asi mismo, las bacterias presentes en lodo activado son generalmente Gram-negativas e incluyen Pseudomonas, Achromobacter, Flavobacterium, Nocardia, Bdellovibrio y Mycobacterium (Sharifi et al.
That the Schools subvert such ideas can be seen in the careers of many alumnae, for example Professor Ruth Gregory, who completed a PhD at Cambridge University and currently holds chairs in both Mathematics and Physics at Durham University; Aine O'Brien, who is currently studying a PhD at Glasgow University with a focus on Martian meteorites; and Professor Liz Sockett, who works at the University of Nottingham where she trying to establish the predatory bacteria Bdellovibrio as a way of fighting against superbugs.
Ancient and recent lateral gene transfers have been reported to occur in Bdellovibrio spp., and this may play a crucial role in their evolution probably leading to the development of unique features that can impact on their predatory lifestyle [5, 7, 8].
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.
Conti, "Electron microscopic observations on the penetration of Bdellovibrio bacteriovorus into gram-negative bacterial hosts," Journal of Bacteriology, vol.
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.
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.
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.
John Tudor, of the Biology Department, on a scholarly project, "Isolation of Genes Necessary for Predation in Bdellovibrio bacteriovorus."