Sources
Help build the largest human-edited directory on the web.
Submit a site - Become an editor
Wikipedia. Licensed under the GNU Free Documentation License.
Are you an expert in this subject? Join the discussion and share your knowledge at Wikipedia.org.
Proteus mirabilis
From Wikipedia, the free encyclopedia
| Proteus mirabilis | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 P. mirabilis on an XLD agar plate.
|
||||||||||||||
| Scientific classification | ||||||||||||||
|
||||||||||||||
| Binomial name | ||||||||||||||
| Proteus mirabilis Hauser 1885 |
Proteus mirabilis is a Gram-negative, facultatively anaerobic bacterium. It shows swarming, motility, and urease activity. P. mirabilis causes 90% of all 'Proteus' infections. It belongs to the Tribe Proteae.
Contents |
An alkaline urine sample is a possible sign of P. mirabilis.
P. mirabilis can be diagnosed in the lab due to characteristic swarming motility, and inability to metabolize lactose (on a MacConkey agar plate, for example.) Also P. mirabilis produces a very distinct odour.
This rod shaped bacterium has the ability to produce high levels of urease. Urease hydrolyzes urea to ammonia (NH3) and thus makes the urine more alkaline. If left untreated, the increased alkalinity can lead to the formation of crystals of struvite, calcium carbonate, and/or apatite. The bacteria can be found throughout the stones, and these bacteria lurking in the stones can reinitiate infection after antibiotic treatment. Once the stones develop, over time they may grow large enough to cause obstruction and renal failure. Proteus can also cause wound infections, septicemia and pneumonias, mostly in hospitalized patients.
P. mirabilis is generally susceptible to most antibiotics apart from tetracycline, however 10%–20% of P. mirabilis strains are also resistant to first generation cephalosporins and ampicillins.
P. mirabilis can utilize urea and citrate. It can produce hydrogen sulfide gas, and forms clear films on growth media. It is motile, possessing peritrichous flagella, and is known for its swarming ability. It is commonly found in the intestinal tract of humans. P. mirabilis is not pathogenic in guinea pigs or chickens. Noteworthy is the ability of this species to inhibit growth of unrelated strains resulting in a macroscopically visible line of reduced bacterial growth where two swarming strains intersect. This line is named Dienes line after its discoverer Louis Dienes.
The micro-organism tests:
- Indole negative and Nitrogen Reductase positive (no gas bubble produced)
- Methyl Red positive and Vogues-Proskauer negative
- Catalase positive and Cytochrome Oxidase negative
- Phenylalanine Deaminase positive
- "Proteus mirabilis and Urinary Tract Infection" [1].
- Proteus Genome Projects from Genomes OnLine Database
 |
Please expand this article using the suggested source(s) below. More information might be found in a section of the talk page. |
- Esipov, Sergei E. and J. A. Shapiro (1998). "Kinetic model of Proteus mirabilis swarm colony development". Journal of Mathematical Biology 36 (3). doi:10.1007/s002850050100.
- Frénod, Emmanuel (2006). "Existence result for a model of Proteus mirabilis swarm". Differential and integral equations 19 (6): 697-720.
- Gué, Michaël, Virginie Dupont, Alain Dufour, and Olivier Sire (2001). "Bacterial swarming: A biological time-resolved FTIR-ATR study of Proteus mirabilis swarm-cell differentiation". Biochemistry 40 (39): 11938-11945. doi:10.1021/bi010434m.
- O Rauprich, M Matsushita, CJ Weijer, F Siegert, SE Esipov and JA Shapiro (1996). "Periodic phenomena in Proteus mirabilis swarm colony development". Journal of Bacteriology 178 (22): 6525–6538.