Serratia: Difference between revisions
Jump to navigation
Jump to search
YazanDaaboul (talk | contribs) No edit summary |
YazanDaaboul (talk | contribs) No edit summary |
||
Line 32: | Line 32: | ||
==Overview== | ==Overview== | ||
'''''Serratia''''' is a | '''''Serratia''''' is a ubiquitous organism that is frequently present in food, soil, and damp conditions. | ||
*''Serratia'' is a lactose-forming, [[Gram-negative]], [[Facultative anaerobic organism|facultatively anaerobic]], [[bacillus|rod-shaped]] [[bacteria]] of the [[Enterobacteriaceae]] family. | |||
*Clinically, ''Serratia'' may infect multiple organ systems. It may be responsible for urinary tract infection, pneumonia , osteomyelitis, meningitis, endocarditis, intra-abdominal infections, and eye and tear duct infections (conjunctivitis, keratitis, endophthalmitis). | |||
''Serratia'' is notoriously known for its antimicrobial resistance due to the presence of R-factor, a virulence factor. | |||
==Serratia marcescens== | |||
*''S. marcescens'' is a [[motile]], Gram-negative, [[Facultative anaerobic organism|facultatively anaerobic]] rod-shaped bacteria that can grow in temperatures ranging from 5–40°C and in [[pH]] levels ranging from 5 to 9. | |||
:*''S. marcescens'' is able to perform [[casein]] [[hydrolysis]], which facilitates the production of extracellular metalloproteases thought to function in cell-to-extracellular matrix interactions. | |||
- | :*''S. marcescens'' also exhibits [[tryptophan]]- and [[citrate]]-degradation. [[Pyruvic acid]], an end-product of tryptophan degradation, and carbon, an end-product of citrate degradation, are then incorporated into metabolic processes. | ||
< | :*''S. marcescens'' produces a reddish-orange (bloody) pigment called [[prodigiosin]]. | ||
* Identification of the organism may be done via the ''[[methyl red]] test'', which determines if a microorganism performs mixed-acid fermentation. Typically, ''S. marcescens'' results in a negative test. | |||
<gallery> | |||
Image: Enterobacteria40.jpeg| Blood agar base plate cultivated colonial growth of Gram-negative, rod-shaped and facultatively anaerobic Serratia marcescens bacteria. <SMALL><SMALL>''[http://phil.cdc.gov/phil/home.asp From Public Health Image Library (PHIL).] ''<ref name=PHIL> {{Cite web | title = Public Health Image Library (PHIL) | url = http://phil.cdc.gov/phil/home.asp}}</ref></SMALL></SMALL> | |||
</gallery> | |||
==References== | |||
{{Reflist|2}} | |||
[[Category:Enterobacteria]] | [[Category:Enterobacteria]] | ||
[[Category:Gram negative bacteria]] | |||
[[Category: Infectious Disease Project]] | |||
{{WikiDoc Help Menu}} | |||
{{WikiDoc Sources}} | |||
{{WikiDoc Help Menu}} | {{WikiDoc Help Menu}} | ||
{{WikiDoc Sources}} | {{WikiDoc Sources}} |
Revision as of 16:37, 11 January 2016
Serratia infection Microchapters |
Diagnosis |
---|
Treatment |
Case Studies |
Serratia On the Web |
American Roentgen Ray Society Images of Serratia |
Serratia | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Scientific classification | ||||||||||||
| ||||||||||||
Species | ||||||||||||
S. entomophila |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Serratia is a ubiquitous organism that is frequently present in food, soil, and damp conditions.
- Serratia is a lactose-forming, Gram-negative, facultatively anaerobic, rod-shaped bacteria of the Enterobacteriaceae family.
- Clinically, Serratia may infect multiple organ systems. It may be responsible for urinary tract infection, pneumonia , osteomyelitis, meningitis, endocarditis, intra-abdominal infections, and eye and tear duct infections (conjunctivitis, keratitis, endophthalmitis).
Serratia is notoriously known for its antimicrobial resistance due to the presence of R-factor, a virulence factor.
Serratia marcescens
- S. marcescens is a motile, Gram-negative, facultatively anaerobic rod-shaped bacteria that can grow in temperatures ranging from 5–40°C and in pH levels ranging from 5 to 9.
- S. marcescens is able to perform casein hydrolysis, which facilitates the production of extracellular metalloproteases thought to function in cell-to-extracellular matrix interactions.
- S. marcescens also exhibits tryptophan- and citrate-degradation. Pyruvic acid, an end-product of tryptophan degradation, and carbon, an end-product of citrate degradation, are then incorporated into metabolic processes.
- S. marcescens produces a reddish-orange (bloody) pigment called prodigiosin.
- Identification of the organism may be done via the methyl red test, which determines if a microorganism performs mixed-acid fermentation. Typically, S. marcescens results in a negative test.
-
Blood agar base plate cultivated colonial growth of Gram-negative, rod-shaped and facultatively anaerobic Serratia marcescens bacteria. From Public Health Image Library (PHIL). [1]