Bacteriovorax

Abstract

Bac.te.ri.o.vo' rax . Gr. dim. n. bacterion small rod; L. n. vorax devourer; M.L. n. Bacteriovorax devourer of bacteria. Proteobacteria / Deltaproteobacteria / Bdellovibrionales / Bdellovibrionaceae / Bacteriovorax Members of the genus Bacteriovorax exhibit the same general morphological and life cycle features as described for the genus Bdellovibrio . However, genetically the two genera vary considerably, with Bacteriovorax sp. having a lower mol % G + C content, little to no DNA–DNA hybridization (< 4 %), and < 82 % rDNA similarity with Bdellovibrio . The mol % G + C of the DNA is : 41–43.5. Type species : Bacteriovorax stolpii (Seidler, Mandel and Baptist 1972) Baer, Ravel, Chun, Hill and Williams 2000, 223 ( Bdellovibrio stolpii Seidler, Mandel and Baptist 1972, 216.)

Halobacteriovorax isolated from marine water of the Adriatic sea, Italy, as an effective predator of Vibrio parahaemolyticus, non-O1/O139 V. cholerae, V. vulnificus

“…Bdellovibrio and like organisms (BALOs) are Gram‐negative, aerobic bacteria which are predatory towards other Gram‐negative bacteria (Stolp and Starr ; Williams and Baer ; Williams et al . ).…”

“…These organisms enter into a susceptible prey bacterium and reside within the periplasmic space where they use the cytoplasmic nutrients of the prey to support growth and replication. The replicative form, known as bdelloplast, extends within the prey and separates into progeny cells that are released as soon as the host is lysed and are able to attack other preys (Williams and Baer ; Williams et al . ).…”

Vibrio parahaemolyticus-specific Halobacteriovorax From Seawater of a Mussel Harvesting Area in the Adriatic Sea: Abundance, Diversity, Efficiency and Relationship With the Prey Natural Level

“…In the marine environment, predation has been extensively explored in animals, microbial eukaryotes and viruses (Baum and Worm, 2009) while predation by bacteria is less well understood (Williams et al, 2015). The genus Halobacteriovorax, in the class Deltaproteobacteria, family Bacteriovoracaceae, consists of small, Gram-negative, flagellated, marine predator bacteria that are members of a broader group of predatory bacteria known as Bdellovibrio and like organisms (BALOs), also including nonmarine (terrestrial and freshwater) forms (Williams and Baer, 2005). BALOs enter into a susceptible Gram-negative prey bacterium and reside within the periplasmic space where they use the cytoplasmic nutrients of the prey to support growth and replication.…”

“…BALOs enter into a susceptible Gram-negative prey bacterium and reside within the periplasmic space where they use the cytoplasmic nutrients of the prey to support growth and replication. The replicative form, known as bdelloplast, extends within the prey and divides into progeny cells that are released as soon as the host is lysed and are able to attack other preys (Williams and Baer, 2005). The genus Halobacteriovorax, according to the results of the analysis of the 16S rRNA gene sequence, includes two species Halobacillus litoralis and Halobacteriovorax marinus for which the similarity between the type strains is 92.61% (Koval et al, 2015).…”