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Occurrence and pathogenic role of Morganella-Proteus-Providencia group bacteria in human feces
Abstract:
A total of 2,693 fecal specimens, with 1,422 from healthy persons and 1,271 from patients suffering from enteric diseases, was investigated to isolate species of the Morganella-Proteus-Providencia group and to evaluate the role of these bacteria in intestinal disorders. Most strains were isolated from two media, i.e., blood agar and tryptophan agar. Two of the species were more frequently found in diarrheal cases than in healthy controls. These species were Morganella morganii and Proteus mirabilis. Two new species of Enterobacteriaceae, i.e., Proteus penneri and Providencia rustigianii, were found in 33 and 5 people, respectively. However, these two species were not found more frequently in the diarrheal cases.
Insights
This study investigated the Morganella-Proteus-Providencia group in 2,693 fecal samples, finding Morganella morganii and Proteus mirabilis more common in diarrheal cases, suggesting their role in intestinal disorders.
Area of Science:
- Microbiology
- Clinical Microbiology
- Bacteriology
Background:
- The Morganella-Proteus-Providencia group comprises bacteria that can cause human infections.
- Understanding the prevalence of these bacteria in healthy individuals versus those with enteric diseases is crucial for diagnosing intestinal disorders.
Purpose of the Study:
- To isolate and identify species within the Morganella-Proteus-Providencia group from fecal specimens.
- To evaluate the association of specific species with enteric diseases.
Main Methods:
- Analysis of 2,693 fecal specimens (1,422 healthy, 1,271 enteric disease patients).
- Bacterial isolation using blood agar and tryptophan agar media.
- Identification of bacterial species within the Morganella-Proteus-Providencia group.
Main Results:
- Morganella morganii and Proteus mirabilis were isolated more frequently from patients with diarrhea compared to healthy controls.
- Two novel Enterobacteriaceae species, Proteus penneri and Providencia rustigianii, were identified in a small number of individuals.
- Proteus penneri and Providencia rustigianii were not found to be more prevalent in diarrheal cases.
Conclusions:
- Morganella morganii and Proteus mirabilis may play a role in the etiology of diarrheal diseases.
- Further research is needed to clarify the clinical significance of Proteus penneri and Providencia rustigianii.