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Bacterial motility is a colonization factor in experimental urinary tract infection
1National Public Health Institute, Helsinki, Finland.
Infection and Immunity
|September 1, 1992
Summary
Bacterial motility, not O antigen, is crucial for Salmonella Typhimurium colonization in mouse urinary tract infections. Flagellated bacteria effectively colonize the bladder, highlighting motility
Area of Science:
- Microbiology
- Infectious Diseases
- Bacterial Pathogenesis
Background:
- Urinary tract infections (UTIs) are common, with bacterial colonization being a key step.
- Salmonella enterica serovar Typhimurium is an opportunistic pathogen that can cause UTIs.
- Bacterial factors influencing UTI pathogenesis are not fully understood.
Purpose of the Study:
- To investigate the role of bacterial motility and O antigen in Salmonella Typhimurium colonization of the mouse urinary bladder.
- To determine if flagellar motility is essential for successful bladder colonization.
Main Methods:
- Generation of isogenic Salmonella Typhimurium strains with varying motility through genetic recombination.
- Experimental induction of urinary tract infections in mice.
- Quantification of bacterial colonization in the urinary bladder.
Main Results:
- Bacterial motility significantly influenced Salmonella Typhimurium colonization of the urinary bladder.
- Non-motile strains showed reduced colonization compared to motile strains.
- The O antigen type (O-6,7 vs. O-4,5,12) did not affect colonization, irrespective of motility.
Conclusions:
- Bacterial flagellar motility is a critical factor for Salmonella Typhimurium colonization in the urinary tract.
- Motility, rather than O antigen, plays a dominant role in the initial stages of UTI pathogenesis.
- Targeting bacterial motility could be a potential strategy for preventing or treating UTIs.