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Phagocytosis of Campylobacter jejuni and C. coli by peritoneal macrophages
Journal of General Microbiology
|August 1, 1986
Abstract:
Guinea-pig resident peritoneal macrophages had no activity against freshly isolated Campylobacter jejuni, whilst C. coli was phagocytosed and killed. The number of bacteria killed by macrophages always exceeded the number of those ingested, suggesting an extracellular mechanism of killing.
Insights
Guinea-pig macrophages effectively killed Campylobacter coli but not Campylobacter jejuni. This suggests macrophages utilize an extracellular mechanism to eliminate C. coli.
Area of Science:
- Immunology
- Microbiology
- Bacterial Pathogenesis
Background:
- Campylobacter species are significant foodborne pathogens.
- The role of innate immune cells, like macrophages, in controlling Campylobacter infections is crucial.
- Understanding macrophage-host interactions is key to developing effective treatments.
Purpose of the Study:
- To investigate the activity of guinea-pig resident peritoneal macrophages against Campylobacter jejuni and Campylobacter coli.
- To elucidate the mechanism of bacterial killing by macrophages.
Main Methods:
- Isolation of Campylobacter jejuni and Campylobacter coli from primary sources.
- Incubation of bacteria with guinea-pig resident peritoneal macrophages.
- Assessment of bacterial phagocytosis and killing through quantitative microbiological assays.
Main Results:
- Macrophages showed no activity against freshly isolated Campylobacter jejuni.
- Campylobacter coli was effectively phagocytosed and killed by macrophages.
- The number of bacteria killed exceeded the number ingested, indicating extracellular killing.
Conclusions:
- Guinea-pig macrophages possess differential activity against Campylobacter species.
- An extracellular killing mechanism is implicated in macrophage activity against Campylobacter coli.
- Further research into macrophage-mediated immunity against Campylobacter is warranted.