Bacteria, Forms of definition of Bacteria, Forms of in the Free Online Encyclopedia.

Bacteria, Forms of

the external shapes of bacterial cells. The most common forms of bacteria are spherical (cocci), rod-shaped (bacilli), and spiral-shaped (vibrios and spirilla).

A distinct type of bacterium, called an L form, or L variant, is produced when a bacterium’s cell wall is partly or almost destroyed, or when the cell loses its ability to form a wall. Unlike spheroplasts and protoplasts, L forms retain their ability to grow and reproduce. They were discovered in 1935 by the English biologist E. Klieneberger-Nobel and were named L (Listeria) forms after the Lister Institute of Preventive Medicine in London. L transformation can occur in most species of bacteria, including cocci, Escherichia coli, and Pasteurella.

L forms of different species of bacteria may be identical morphologically; they are generally spherical, vacuolated bodies varying in size from 1 micron to 250 nanometers. L forms are produced under the influence of such substances as penicillins, which prevent the biosynthesis of the bacterium’s cell wall. L forms are also produced when bacterial cell division is inhibited while cell growth is maintained. Under certain conditions, L forms can revert to the original bacteria. L forms often occur during the course of such prolonged diseases as brucellosis.

Mentioned in	?		Encyclopedia browser	?		Full browser	?
No references found			Bacolod Bacon Bacon County Bacon's Rebellion Bacon, Delia Salter Bacon, Francis Bacon, Francis, Viscount St. Albans Bacon, Henry Bacon, Leonard Bacon, Nathaniel Bacon, Peggy Bacon, Robert Bacon, Roger Bacon, Sir Nicholas Bacovia, Georghe BACP Bacq, Zenon Marcel Bacq, Zénon Marcel Bacs-Kiskun Bács-Kiskun Bacteremia bacteremic shock Bacteria Bacteria Traps Bacteria, Dissociation of Bacteria, Forms of Bacteriaceae bacterial blight bacterial bronchopneumonia bacterial brown spot bacterial canker bacterial capsule bacterial coenzyme bacterial competence bacterial corrosion bacterial diseases Bacterial Diseases of Plants bacterial encephalitis bacterial endocarditis bacterial endoenzyme bacterial endospore bacterial enzyme Bacterial Fertilizers Bacterial Filters Bacterial genetics Bacterial growth bacterial infection bacterial leaf spot Bacterial Lixiviation bacterial luminescence bacterial metabolism			bacteremic Bacteremic Klebsiella Pneumoniae Pneumonia bacteremic shock bacteremic shock bacteremically bacteremically bacteremically bacteri(o)- bacteri- bacteri- bacteria bacteria bacteria bacteria bed bacteria bed Bacteria Colony Forming Particles Bacteria Controlled Nursing Unit bacteria family bacteria genus bacteria in gingivitis bacteria in gingivitis bacteria in gingivitis Bacteria in the human body bacteria order Bacteria phage Bacteria phage Bacteria phage bacteria species Bacteria Traps Bacteria, Dissociation of Bacteria, Forms of bacteria-proof filter bacteria-proof filter bacteria-proof filter bacteria-proof filter bacteria-proof filter Bacteriaceae bacteriacide bacteriaemia bacterial bacterial bacterial bacterial adherence bacterial adhesion bacterial adhesion bacterial adhesion bacterial adhesion Bacterial Adhesion to Hydrocarbon bacterial adhesiveness bacterial adhesiveness Bacterial ADP bacterial agglutination test bacterial agglutination test bacterial agglutination test bacterial agglutination test bacterial allergy bacterial allergy bacterial allergy bacterial aneurysm bacterial aneurysm bacterial aneurysm

Bacteria, Forms of

REFERENCE