The pathogenicity of environmental campylobacters-a human volunteer experiment

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Abstract
SUMMARY: Three human volunteer experiments were performed in which river water expected to contain campylobacter organisms was ingested. Despite the ingestion of over 44000 organisms in one experiment, the subject did not suffer any symptoms, nor were campylobacter organisms excreted, nor was an antibody response to the ingested strains detected. The campylobacter organisms ingested resembledCampylobacter jejunion colonial and microscopic morphology but were hippurate negative, and were distinct fromC. coli. These environmental campylobacter strains appear to be non-pathogenic, however they may be mistaken forC. JejuniorC.coliif they are not fully identified.