Serratia liquefaciens: Difference between revisions
| Line 27: | Line 27: | ||
==Description and significance== | ==Description and significance== | ||
S. liquefaciens is a straight rod shaped bacterium with a diameter of 0.5-0.8 μm, a length of 0.9-2.0 μm, and Gram negative. Gram negative organisms have a thinner layer of peptidoglycan surrounded by an inner and outer membrane. Serratia species are usually motile and contain peritrichous flagella. [Bergey’s Manual of Determinative Bacteriology:9th edition p.187] | <i>S. liquefaciens</i> is a straight rod shaped bacterium with a diameter of 0.5-0.8 μm, a length of 0.9-2.0 μm, and Gram negative. Gram negative organisms have a thinner layer of peptidoglycan surrounded by an inner and outer membrane. <i>Serratia</i> species are usually motile and contain peritrichous flagella. [Bergey’s Manual of Determinative Bacteriology:9th edition p.187] | ||
S. liquefaciens are facultative anaerobes making oxygen inessential to survival. They can inhabit both aerobic and anaerobic environments. Thus, S. liquefaciens is a widespread bacteria found in the environment and capable of colonizing on soil, water, plants, and the digestive tracts of rodents, insects, fish, and humans.[http://jb.asm.org/content/186/3/692.full] However, it must be noted that S. liquefaciens is not a normal component of human fecal flora. [http://emedicine.medscape.com/article/228495-overview] | <i>S. liquefaciens</i> are facultative anaerobes making oxygen inessential to survival. They can inhabit both aerobic and anaerobic environments. Thus, <i>S. liquefaciens</i> is a widespread bacteria found in the environment and capable of colonizing on soil, water, plants, and the digestive tracts of rodents, insects, fish, and humans.[http://jb.asm.org/content/186/3/692.full] However, it must be noted that <i>S. liquefaciens</i> is not a normal component of human fecal flora. [http://emedicine.medscape.com/article/228495-overview] | ||
Not much is actually known about <i>Serratia liquefaciens</i>. In fact, up until 1971, it was actually characterized as <i>Enterobacter liquefaciens</i>. After extensive comparison with <i>S. marcescens</i>, <i>E. liquefaciens</i> was determined to be closely related to <i>S. marcescens</i> and the genus was changed to <i>Serratia</i>.[http://www.annualreviews.org/doi/abs/10.1146/annurev.mi.32.100178.001253] | |||
Following the genus change, little can be found regarding <i>S. liquefaciens</i>. However, it has been proven to have certain antifungal properties in a plant’s rhizosphere. [http://www.sciencedirect.com/science/article/pii/S0944501396800140] It is also a pathogenic bacterium that has been associated with severe nosocomial infections. The <i>Serratia</i> genus as a whole is responsible for about 2% of nosocomial infections; most of which are attributed to <i>S. marcescens</i>. They tend to colonize in respiratory and urinary tracts of adults.[http://emedicine.medscape.com/article/228495-overview#showall] | |||
==Genome structure== | ==Genome structure== | ||
Revision as of 00:34, 10 May 2012
A Microbial Biorealm page on the genus Serratia liquefaciens
Classification
Higher order taxa [1]
Domain: Bacteria
Phylum: Proteobacteria
Class: Gammaproteobacteria
Order: Enterobacteriales
Family: Enterbacteriaceae
Genus: Serratia
Species
|
NCBI: Taxonomy |
Serratia liquefaciens
Description and significance
S. liquefaciens is a straight rod shaped bacterium with a diameter of 0.5-0.8 μm, a length of 0.9-2.0 μm, and Gram negative. Gram negative organisms have a thinner layer of peptidoglycan surrounded by an inner and outer membrane. Serratia species are usually motile and contain peritrichous flagella. [Bergey’s Manual of Determinative Bacteriology:9th edition p.187]
S. liquefaciens are facultative anaerobes making oxygen inessential to survival. They can inhabit both aerobic and anaerobic environments. Thus, S. liquefaciens is a widespread bacteria found in the environment and capable of colonizing on soil, water, plants, and the digestive tracts of rodents, insects, fish, and humans.[2] However, it must be noted that S. liquefaciens is not a normal component of human fecal flora. [3]
Not much is actually known about Serratia liquefaciens. In fact, up until 1971, it was actually characterized as Enterobacter liquefaciens. After extensive comparison with S. marcescens, E. liquefaciens was determined to be closely related to S. marcescens and the genus was changed to Serratia.[4]
Following the genus change, little can be found regarding S. liquefaciens. However, it has been proven to have certain antifungal properties in a plant’s rhizosphere. [5] It is also a pathogenic bacterium that has been associated with severe nosocomial infections. The Serratia genus as a whole is responsible for about 2% of nosocomial infections; most of which are attributed to S. marcescens. They tend to colonize in respiratory and urinary tracts of adults.[6]
Genome structure
Describe the size and content of the genome. How many chromosomes? Circular or linear? Other interesting features? What is known about its sequence?
Cell structure and metabolism
Interesting features of cell structure; how it gains energy; what important molecules it produces.
Ecology
Habitat; symbiosis; contributions to the environment.
Pathology
How does this organism cause disease? Human, animal, plant hosts? Virulence factors, as well as patient symptoms.
Current Research and or Application to Biotechnology
Enter summaries of the most recent research and/or application to biotechnology here--at least three required
References
Edited by student of Dr. Lynn M Bedard, DePauw University http://www.depauw.edu
