deconditioning , a prior period of four or more days of exposure to ndga in the germ-free state , the duration of the contamination period , and the presence of cecal flora were identified as prerequisites to accelerated cyst formation in this model , while the dose of ingested ndga , the presence of bacteria within the kidney , an action of bacteria on ndga within the colon , and the type ( s ) of organisms colonizing the host were not .
C0004611
bacteria
C0029235
organisms