- Poster presentation
- Open Access
Effect of bacterial load versus duration of exposure to bacteria on plasma TNFα concentrations in porcine fecal peritonitis
© Correa et al. 2011
- Published: 1 March 2011
- Public Health
- Emergency Medicine
- Standardize Protocol
- Clinical Relevance
The clinical relevance of preclinical sepsis research has been questioned . This may in part be the result of varying degrees of experimental inflammatory insults. The objective of this study was to quantify inflammation based on plasma TNFα levels after exposure to two different bacterial loads, and after different lengths of bacterial incubation in the peritoneal cavity.
We retrospectively evaluated plasma TNFα concentrations measured before and 24 hours after fecal peritonitis induced by 1 g/kg autologous feces (16 anesthetized pigs, median weight: 40.0 kg) and after 6, 12 and 24 hours of fecal peritonitis induced with 2 g/kg autologous feces (24 anesthetized pigs (n = 8/group); median weight: 41.0 kg). All animals were resuscitated with fluids, and antibiotics, and were mechanically ventilated according to standardized protocols. Differences along time after fecal peritonitis induced with 2 g/kg feces were assessed by ANOVA for repeated measures. Comparison between the two models (1 g/kg vs. 2 g/kg) after 24 hours of peritonitis was performed with an independent t test.
The magnitude of inflammation expressed as plasma TNFα concentrations was associated with the duration of bacterial incubation in the peritoneal cavity but not with the amount of bacterial load. This has implications for the interpretation of experimental sepsis findings.