Rigid bronchoscopy induces bacterial translocation: an experimental study in rats
1Dept of Paediatric Surgery, Mersin University School of Medicine, Mersin, Turkey. anayci@mersin.edu.tr
Abstract:
Bronchoscopy has the potential to propagate infections. Bacterial translocation was hypothesised to be the cause of infections observed following bronchoscopy and this study was designed to assess the risk of bacterial translocation following rigid bronchoscopy in rats. A total of 30 rats were evaluated. The study group (n=15) underwent rigid bronchoscopy. Arterial blood gas analysis was performed in all rats. Blood and tissue cultures from the ileum, caecum, mesenteric lymph nodes, liver, spleen, mediastinal lymph nodes and lung were obtained 24 h following bronchoscopy. Bacterial translocation to the mesenteric lymph nodes was found in seven of 15 rats (46.7%) that underwent bronchoscopy, compared with none of the controls. Of the seven positives, three rats (42.8%) also demonstrated other organ involvement, such as the liver and spleen. Escherichia coli, Salmonella typhymirium, S. enteritidis and Pseudomonas spp. were found as translocating bacteria. In the study group, pH and arterial oxygen tension were significantly lower and arterial carbon dioxide tension was higher, compared with controls. This study shows that rigid bronchoscopy may induce bacterial translocation in rats. Further investigations aimed at understanding the clinical consequences of this phenomenon are warranted.
Insights
Rigid bronchoscopy in rats may lead to bacterial translocation, where bacteria move to other organs. This procedure also caused changes in blood gases, suggesting potential infection risks.
Area of Science:
- Medical Microbiology
- Surgical Procedures
- Animal Models
Background:
- Bronchoscopy is a medical procedure that can potentially spread infections.
- Bacterial translocation is a suspected cause of post-bronchoscopy infections.
Purpose of the Study:
- To investigate the risk of bacterial translocation following rigid bronchoscopy.
- To assess the impact of rigid bronchoscopy on bacterial translocation in a rat model.
Main Methods:
- Rigid bronchoscopy was performed on 15 rats.
- Blood and tissue cultures were obtained from various organs 24 hours post-procedure.
- Arterial blood gas analysis was conducted on all rats.
Main Results:
- Bacterial translocation to mesenteric lymph nodes occurred in 46.7% of rats undergoing bronchoscopy.
- Three rats (42.8%) showed bacterial translocation to other organs like the liver and spleen.
- Significant alterations in blood gas parameters (pH, PaO2, PaCO2) were observed in the study group.
Conclusions:
- Rigid bronchoscopy can induce bacterial translocation in rats.
- The findings suggest a potential mechanism for infection propagation following bronchoscopy.
- Further research is needed to understand the clinical implications of these findings.
