Abstract
Using axenic quails fed a diet containing lactose, we have investigated the potentially pathogenic roles of six Clostridium butyricum strains of human origin. Three strains (CB155-3, CB1002, and CB203-1) isolated from neonatal necrotizing enterocolitis patients and two of three strains (CB19-1 and CB25-2) isolated from healthy newborns led to cecal or crop lesions or both similar to those observed in human neonatal necrotizing enterocolitis: thickening of the cecal wall with gas cysts, hemorrhagic ulcerations, and necrotic areas. The lactose-negative strain (CB46-1) did not develop any lesions. The neuraminidase-producing strain (CB155-3) caused lesions in all monoassociated quails, whereas the other strains caused lesions in 28 to 85% of animals. Removal of dietary lactose suppressed all pathological incidence. These results show that lactose fermentation is a prerequisite in these pathological changes and stress the roles played by both the strain and the host in the expression of C. butyricum enteropathogenicity.
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