Proteus vulgaris
1. Classification
a. Higher order taxa
Domain; Phylum; Class; Order; Family; Genus Include this section if your Wiki page focuses on a specific taxon/group of organisms Domain (Bacteria); Phylum (Proteobacteria); Class (Gammaproteobacteria); Order (Enterobacterales); Family (Morganellaceae); Genus (Proteus) Species (Vulgaris)
2. Description and significance
Proteus vulgaris is one of five bacterial species within the genus Proteus, and one of three species within the genus that are opportunistic pathogens (1). P. vulgaris is a rod-shaped, Gram negative bacterium between 1-3 microns in size, and is extremely motile, utilizing peritrichous flagella as its source of motility (2). All members of the genus Proteus are known to be saprophytes, an organism that resides in dead or decaying organic matter, mainly in fecal matter and intestinal tracts of humans and animals (1, 3). P. vulgaris is relevant in many fields of research, due to its pathogenic capabilities, as well as its capacity for antibiotic resistance (4, 5, 6). It has been observed in the digestive tracts of various livestock, including cattle, bovines, and carp, making the bacterium a danger to humans by means of food contamination (5, 7, 8). P. vulgaris is also known to cause numerous types of nosocomial infections, including those of the urinary tract, burns, and other exposed wounds, and can be associated with various types of brain abscesses (9, 10, 11). P. vulgaris may also have positive applications, such as biofuel production (12), aromatic contribution to cheese ripening (13), and plant growth promotion (14), but further research is needed to prove the effectiveness and validity of these applications.
3. Genome structure
The genome of P. vulgaris has 3.97 million base pairs and 3,660 genes. It is circular in structure, and contains 3,513 proteins, 14 rRNa proteins, 77 tRNA proteins, and 53 pseudogenes (15). Bacteria from the genus Proteus can be differentiated on the basis of O-antigen variability, the serospecificity of the lipopolysaccharide can decipher between strains of Proteus rods divided into the groups: P. mirabilis, P. vulgaris, P. penneri, P. hauseri, and P. myxofaciens (16). The chemical structure of the sugar part of the lipopolysaccharide may play a role in enhancing pathogenicity (16).
4. Cell structure
P. vulgaris is a rod-shaped, chemoorganotrophic, Gram-negative bacteria between 1 and 3 microns in size (2). It is motile by peritrichous flagella, and does not have capsules or spores (2). A key characteristic of genus Proteus is swarming ability, and a simple Dienes test is used to differentiate between strains (17). P. vulgaris is facultatively anaerobic and has both a respiratory and fermentative type metabolism (3). It is capable of phenylalanine deaminase and urease production, and glucose, maltose, and sucrose fermentation (18, 19). One study researching alternative methods for urinalysis found that urea levels could be detected using electrochemical signaling from redox reactions that take place on the surface membrane, specifically the conversion of urea to ammonia (8). When comparing Genus Proteus, a key tool to decipher P. vulgaris from other species in the genus is that P. vulgaris is indole-positive using an spot indole test using dimethylaminocinnamaldehyde reagent (20) .
5. Ecology
Agriculture
Many wild and domestic animals can be hosts of P. vulgaris bacteria, where they commonly play the role of a parasite (1). In calf bedding samples contaminated with feces, P. vulgaris was the first of its genus to be identified, such that food animals may be a source of P. vulgaris in the human gut (7). Nasal swabs collected from bovines with respiratory illness also had isolated colonies of P. vulgaris showing a possible spread of bacteria through the food chain (5).
Marine
P. vulgaris present in water or soil conditions usually indicates fecal pollution, which poses a dangerous health risk when consumed in the form of food or water, such as the occurrence of P. vulgaris in raw shellfish (21). For example, several antibiotic-resistant strains of P. vulgaris were identified in the intestines of shrimp in Turkey. This contamination was linked to hospital and industrial waste (21). Marine sponges that were associated with P. vulgaris were considered to be indicators of fecal contamination (9).
Industry and Commerce
In Nigeria, P. vulgaris was found to be the most active strain degrading crude oil compared to other species. This finding was significant for that area, where oil spills are a significant source of pollution (22). P. vulgaris is tolerant of high concentrations of heavy metals or toxic substances, and can even manipulate these as a source of energy or nutrition (1). In addition, P. vulgaris lipase has been used with a transesterification reaction and sonication conditions to produce biodiesel (12). P. vulgaris is also found on the surface of ripened cheese, and produces high concentrations of flavor compounds from amino acid degradation during the ripening process (13).
7. Pathology
P. vulgaris has been reported to cause urinary tract infections, wound infections, burn infections, bloodstream infections, and respiratory tract infections (1). In one case study, P. vulgaris caused bacteremia, the presence of bacteria in the blood, and brain abscesses with a suspected point of entrance in the digestive tract (9). In the last decade, P. vulgaris has become less sensitive and more resistant to antibiotics, such as levofloxacin, meropenem, and ciprofloxacin, increasing the risk of a sepsis postoperative infection in Gujarat, India (13). P. vulgaris has also been identified as the main microbial pollutant in drinking water of Rajasthan, India (23).
8. Current Research
Recent research has demonstrated a growing list of uses for P. vulgaris in both medical and industrial applications. Specifically, it has been reported that P. vulgaris was used in an electrochemical chip to detect urea levels in synthetic urine (8). Urea levels were found by analyzing the ammonia oxidation reaction that occurs on the membrane of P. vulgaris. A direct correlation between the ammonia oxidation peaks and the urea concentrations in the synthetic urine were shown (8). Since urea levels can signify a number of health concerns, a quick and cost-effective urinalysis using markers such as the biological reaction carried out by P. vulgaris could be applied to point-of-care testing in medical facilities (8). Additionally, P. vulgaris can cause a variety of medical complications such as urinary tract infections and renal stones (24). A recent study found that using copper oxide and silver nanoparticles is effective at inhibiting the growth of P. vulgaris through the release of ions and free radicals that disrupt its enzymatic and DNA activity (24). Recent research has shown that P. vulgaris can be used in industrial settings, for example, to create biodiesel using an engineered lipase from the bacteria and a transesterification reaction triggered by sonication (12) The P. vulgaris lipase was made more thermostable through the introduction of a disulfide bond in the enzyme. The benefits of a biotechnological alternative to biodiesel synthesis such as this includes “lowering environmental concerns and energy consumption” (12).
9. References
It is required that you add at least five primary research articles (in same format as the sample reference below) that corresponds to the info that you added to this page. [Sample reference] Faller, A., and Schleifer, K. "Modified Oxidase and Benzidine Tests for Separation of Staphylococci from Micrococci". Journal of Clinical Microbiology. 1981. Volume 13. p. 1031-1035.
