Kinetics of Staphylococcus epidermidis Clearance from the Peritoneal Catheter Site of Renal Failure Mice following Intracatheter Inoculation
Bibliographic record
Abstract
A mouse model of surgically induced renal failure harboring a peritoneal catheter implant was utilized to study the response to intracatheter (IC) peritoneal inoculation of 10(6) or 10(8) colony-forming units (CFU) Staphylococcus epidermidis. The kinetics of bacterial clearance from peritoneal structures, including the peritoneal catheter implant, was investigated in renal failure and sham-operated mice. All animals survived experimental challenge with 10(6) CFU; however, microbiological assessments conducted 1 week and 1 month after inoculation revealed that the catheter site of a small number of renal failure mice was persistently colonized. During 1 month following 10(8) CFU IC inoculation, significant animal mortality was observed in renal failure mice (29.4%), while sham-operated controls presented minimal lethality (5.9%). In surviving mice of both groups, the peritoneal catheter site proved to be a reservoir for persisting S. epidermidis, a finding confirmed by scanning electron microscopy. Throughout the study, local and systemic inflammatory responses were comparable in sham-operated and renal failure mice. Nevertheless, 3 and 4 weeks after 10(8) CFU inoculation, S. epidermidis recovery was significantly greater in sham-operated controls. Phenotypic colonial variation was observed in a majority of S. epidermidis isolates, and only in those specimens recovered 2 or more weeks after inoculation. Our results reveal that the peritoneal catheter implant provides a preferred site for persistent bacterial colonization up to 1 month after inoculation.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".