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Proteus mirabilis appears as Gram-negative rods after Gram staining under bright-field microscopy with 1000 times magnification. Proteus mirabilis is a Gram-negative, facultatively anaerobic, rod-shaped bacterium. It shows swarming motility and urease activity. P. mirabilis causes 90% of all Proteus infections in humans.
Specific tests include positive urease (which is the fundamental test to differentiate Proteus from Salmonella) and phenylalanine deaminase tests. On the species level, indole was considered reliable, as it is positive for P. vulgaris, but negative for P. mirabilis.
Among these are Pseudomonas aeruginosa, which has a grape-like scent; Staphylococcus aureus, which is said to smell like old socks; and Proteus mirabilis, whose scent is alternately described as putrid [1]: 168 or like chocolate cake. [7]: 124 Other distinctive features of colonial morphology include motility and the production of pigments.
The basis of the test is the presence of antigenic cross-reactivity between Rickettsia spp. and certain serotypes of non-motile Proteus spp., a phenomenon first published by Edmund Weil and Arthur Felix in 1916. [2] Weil-Felix is a nonspecific agglutination test which detects anti-rickettsial antibodies in patient’s serum.
The IMViC tests are a group of individual tests used in microbiology lab testing to identify an organism in the coliform group. A coliform is a gram negative, aerobic, or facultative anaerobic rod, which produces gas from lactose within 48 hours. The presence of some coliforms indicate fecal contamination.
These include Proteus mirabilis, Pseudomonas aeruginosa, Klebsiella, Escherichia coli, Enterococci, and Group B Streptococci. Studies are still being done into each of these bacteria but below is a brief summary of some of the lesser known bacteria. [15] P. mirabilis can be contracted in the community and in hospitals. This bacteria was ...
Nutrient gelatin tests to detect activity of the enzyme gelatinase. In a clinical setting, three species make up 80 to 95% of all isolates identified. These are Escherichia coli, Klebsiella pneumoniae, and Proteus mirabilis. However, Proteus mirabilis is now considered a part of the Morganellaceae, a sister clade within the Enterobacterales.
Three Proteus species P. vulgaris, P. mirabilis, and P. penneri are opportunistic human pathogens, most commonly resulting in urinary tract infections. [2] Proteus vulgaris is commonly found in the intestine in various animals, and is shed into manure and soil.