
''Bdellovibrio'' is a genus of Gram-negative, obligate aerobe bacterium. One of the more notable characteristics of this genus is that members parasitism other gram-negative bacteria by entering into their periplasmic space and feeding on the biopolymers, e.g. proteins and nucleic acids, of their hosts. After entering the periplasmic space of its host the ''Bdellovibrio'' bacterium forms a structure called bdelloplast, which consists of both predator and prey. The predator cell can remain dormant at this stage, without affecting the viability of the host. In most cases, though, Bdellovibrio moves on and devours its prey. ''Bdellovibrio'' species are found in river water or soil and live an intraperiplasmic existence. To enrich for ''Bdellovibrio'' use NB/500 (nutrient broth at 1:500 dilution) and mix with hot soft agar with ''E. coli'' at 30°C for one week. Under the microscope, a ''Bdellovibrio'' appears as a comma-shaped motile rod that is about 0.3-0.5 by 0.5-1.4 micrometer in size with a barely discernible flagellum. Colonies of ''Bdellovibrio'' show up as a growing clear plaque in an ''E. coli'' bacterial lawn. Another notable feature of ''Bdellovibrio'' is the sheath that covers its flagellum. This is a rare characteristic among bacteria. This flagellum is lost when ''Bdellovibrio'' penetrates its prey. ''Bdellovibrio'' attacks other gram-negative bacteria by colliding with them at a relatively blazing speed of 100 micrometer per second, which is about 100 times its size. They have been recorded swimming at speeds of up to 160 micrometer per second. It enters into their periplasmic space within about 10 minutes by using hydrolysis enzymes. After draining the host of nutrients, it becomes a spherical bdelloplast, then elongates, and divides into several smaller complete ''Bdellovibrios''. At the completion of its life cycle, which takes from one to three hours, the ''Bdellovibrio'' burst free from the remainder of the host cell in order to attack new prey. 3-6 progeny cells are produced from a single ''E. coli'', upto 80 may be released from larger prey such as filamentous ''E. coli''. ''Bdellovibrio bacteriovorus'' was first described by Stolp and Starr in 1963. Two other species, ''B. starrii'' and ''B. stolpii'', have been moved to a separate genus ''Bacteriovorax''. Proteobacteria
''Text from a flashcard I wrote. Article already updated with info. user:maveric149''
Bdellovibrio 1) Inoculum source, lifestyle 2) Enrichment strategy 3) Microscopic appearance 4) Gram reaction, catabolic pathway 5) Colony appearance 6) Other special properties 1) river water or soil, intraperiplasmic 2) NB/500 (nutrient broth 1:500 dil.), hot soft agar w/ E. coli, 30ªC/week 3) comma motile rods 0.3×1.5µ, flag. 4) -, obligate aerobic O2 respiration 5) as a growing plaque in E. coli lawn 6) attack gram - bacteria, enter into periplasmic space, host dies, becomes bdelloplast,invader elongates,divides -----
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Words begining with Bdellovibrio:
Bdellovibrio
Bdellovibrio
Bdellovibrionaceae
Bdellovibrionales
Bdellovibrio_bacteriovorus
Bdellovibrio
''Bdellovibrio'' is a genus of Gram-negative, obligate aerobe bacterium. One of the more notable characteristics of this genus is that members parasitism other gram-negative bacteria by entering into their periplasmic space and feeding on the biopolymers, e.g. proteins and nucleic acids, of their hosts. After entering the periplasmic space of its host the ''Bdellovibrio'' bacterium forms a structure called bdelloplast, which consists of both predator and prey. The predator cell can remain dormant at this stage, without affecting the viability of the host. In most cases, though, Bdellovibrio moves on and devours its prey. ''Bdellovibrio'' species are found in river water or soil and live an intraperiplasmic existence. To enrich for ''Bdellovibrio'' use NB/500 (nutrient broth at 1:500 dilution) and mix with hot soft agar with ''E. coli'' at 30°C for one week. Under the microscope, a ''Bdellovibrio'' appears as a comma-shaped motile rod that is about 0.3-0.5 by 0.5-1.4 micrometer in size with a barely discernible flagellum. Colonies of ''Bdellovibrio'' show up as a growing clear plaque in an ''E. coli'' bacterial lawn. Another notable feature of ''Bdellovibrio'' is the sheath that covers its flagellum. This is a rare characteristic among bacteria. This flagellum is lost when ''Bdellovibrio'' penetrates its prey. ''Bdellovibrio'' attacks other gram-negative bacteria by colliding with them at a relatively blazing speed of 100 micrometer per second, which is about 100 times its size. They have been recorded swimming at speeds of up to 160 micrometer per second. It enters into their periplasmic space within about 10 minutes by using hydrolysis enzymes. After draining the host of nutrients, it becomes a spherical bdelloplast, then elongates, and divides into several smaller complete ''Bdellovibrios''. At the completion of its life cycle, which takes from one to three hours, the ''Bdellovibrio'' burst free from the remainder of the host cell in order to attack new prey. 3-6 progeny cells are produced from a single ''E. coli'', upto 80 may be released from larger prey such as filamentous ''E. coli''. ''Bdellovibrio bacteriovorus'' was first described by Stolp and Starr in 1963. Two other species, ''B. starrii'' and ''B. stolpii'', have been moved to a separate genus ''Bacteriovorax''. Proteobacteria
Bdellovibrio
''Text from a flashcard I wrote. Article already updated with info. user:maveric149''
Bdellovibrio 1) Inoculum source, lifestyle 2) Enrichment strategy 3) Microscopic appearance 4) Gram reaction, catabolic pathway 5) Colony appearance 6) Other special properties 1) river water or soil, intraperiplasmic 2) NB/500 (nutrient broth 1:500 dil.), hot soft agar w/ E. coli, 30ªC/week 3) comma motile rods 0.3×1.5µ, flag. 4) -, obligate aerobic O2 respiration 5) as a growing plaque in E. coli lawn 6) attack gram - bacteria, enter into periplasmic space, host dies, becomes bdelloplast,invader elongates,divides -----
See other meanings of words starting from letter:
B
BA | BC | BD | BE | BF | BG | BH | BI | BJ | BK | BL | BM | BN | BO | BP | BR | BS | BT | BU | BW | BX | BY | BZ |Words begining with Bdellovibrio:
Bdellovibrio
Bdellovibrio
Bdellovibrionaceae
Bdellovibrionales
Bdellovibrio_bacteriovorus
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