What features does Proteus differ from Morganella?
The species comprising the genus Proteus are distinguished biochemically from Morganella and Providencia spp. by their production of hydrogen sulfide and lipase, hydrolysis of gelatin and a lack of acid production from mannose (Table 2; Penner, J. L., and J. N. Hennessy, 1979b).
Is morganella Morganii a Proteus?
Currently, Morganella contains only a single species, M morganii, with 2 subspecies, morganii and sibonii. M morganii was previously classified under the genus Proteus as Proteus morganii. In the late 1930s, M morganii was identified as a cause of urinary tract infections.
What disease is caused by Morganella Morganii?
morganii can cause various infections, such as sepsis, abscess, purple urine bag syndrome, chorioamnionitis, and cellulitis. This bacterium often results in a high mortality rate in patients with some infections.
How can you tell the difference between Proteus species?
Specific tests include positive urease (which is the fundamental test to differentiate Proteus from Salmonella) and phenylalanine deaminase tests. On the species level, indole is considered reliable, as it is positive for P. vulgaris, but negative for P. mirabilis.
What are the characteristics of morganella Morganii?
Morganella morganii is facultatively anaerobic and oxidase-negative. Its colonies appear off-white and opaque in color, when grown on agar plates. M. morganii cells are straight rods, about 0.6–0.7 μm in diameter and 1.0–1.7 μm in length.
Does Morganella produce H2S?
Morganella are motile, non-lactose fermenting gram-negative bacteria, which share with Proteus the capacity for urease production and presence of phenylalanine deaminase. They can be separated from Proteus species by the lack of swarming activity or gelatin liquefaction or H2S production.
Does morganella require isolation?
Definitive diagnosis of Morganella infections requires isolation of the bacteria in the clinical laboratory.
Where is morganella Morganii from?
Morganella morganii is a Gram-negative bacillus commonly found in the environment and in the intestinal tracts of humans as normal flora.
Does morganella produce H2S?
Is morganella Morganii aerobic or anaerobic?
Morganella morganii is facultatively anaerobic and oxidase-negative.
What causes morganella?
In this case, Morganella morganii is Gram-negative bacilli belonging to the family Enterobacteriaceae. The main reason for this opportunistic infection is the immunosuppression status after HSCT. Also, the patient had a medical history of chronic prostatitis.
What is the difference between Proteus and Morganella morganii?
Unlike Proteus species, swarming does not occur. Morganella morganii urinary tract infections are often associated with an alkaline urine pH.
What is the taxonomy of Proteus Providencia and morganellain?
To discuss the taxonomy of Proteus, Providencia, and Morganellaindependently of each other is very difficult. Their taxonomic development is as intertwined as the flagella that are characteristic of some of the individual species and illustrates the evolution of the science of taxonomy as well as the nomenclature of these genera.
What are the characteristics of Morganella morganii?
Morganella morganii ferments glucose and mannose but not lactose. Morganella morganii is motile, facultatively anaerobic, and nonencapsulated, and it hydrolyzes urease and reduces nitrates. Unlike Proteus species, swarming does not occur. Morganella morganii urinary tract infections are often associated with an alkaline urine pH.
What is the pathophysiology of Morganella morganii infection?
Like Proteus species, Morganella morganii has properties that enhance its ability to infect the urinary tract; these include motility and the ability to produce urease. Urolithiasis is associated with both genera.