Efficacy of novel coating in preventing Proteus mirabilis adherence and assessing the pathogenic mechanisms utilized to potentiate catheter-associated urinary tract infections
Bibliographic record
Abstract
Introduction: Proteus mirabilis is a gram-negative, urease-positive bacterium that infects the urinary tract and is linked with catheter-associated urinary tract infections (CAUTIs). CAUTIs are painful, and both physically and financially burdensome infections that are associated with the presence of a urinary catheter that drains urine from the bladder. The insertion of a catheter allows for entry and scaffolding of bacteria, such as P. mirabilis to adhere to and propagate infection in the urinary tract. Methods: In vitro experiments assessed the ability of a novel anti-fouling catheter coating to prevent P. mirabilis adhesion. Coated and uncoated catheters were exposed to bacteria and adherence was quantified via colony-forming units (CFU) counts. In vivo studies utilized a mouse model implanted with coated or uncoated catheters and inoculated with P. mirabilis. Furthermore, adherence of wildtype and mutant P. mirabilis strains to catheters were conducted by co-incubating samples in artificial urine and bacteria; adherence was quantified via CFU counts. Cellular adhesion and invasion assays were utilized to observe wildtype, mutant, and complemented P. mirabilis associations with uroepithelial cells. Briefly, cells were exposed to different strains of P. mirabilis and co-cultured; for adhesion assays, cells were washed, lysed, and plated for CFU counts. For invasion assays: cells were treated with antibiotics to eliminate extracellular bacteria, then washed, lysed, and plated for CFU counts. In vivo experiments assessed bladders, urine, and catheters in mice infected with different P. mirabilis strains. Results: In vitro and in vivo results indicated increased adherence and invasion abilities in wildtype P. mirabilis, compared to mutant strains. Specifically, wildtype was the only strain able to invade uroepithelial cells at 24 hours post-infection. Furthermore, our novel anti-adhering coating significantly reduced bacterial attachment to catheters both in vitro and in vivo. Conclusion: We have shown our novel coating to be highly effective in preventing bacterial adherence both in vitro and in vivo. Moreover, we have observed wildtype P. mirabilis to be capable of invading and adhering to uroepithelial cells at an increased capacity, compared to mutant strains. Through gaining greater insight into the pathogenic mechanisms utilized, we can target and diminish P. mirabilis CAUTIs.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".