title: Effect of tea polyphenols on fecal flora and fecal metabolic products of pigs.
abstract: The effects of tea polyphenols on fecal flora and fecal metabolic activities were studied in eight 30-day-old pigs fed a basal diet (control) or the diet supplemented with 0.2% of tea polyphenols for 2 weeks. During tea polyphenol administration compared to before administration, the levels of lactobacilli were increased significantly (P < 0.05 and P < 0.01 on days 7 and 14 of administration, respectively), whereas the levels of total bacteria (P < 0.01) and bacteroidaceae (P < 0.01 and P < 0.001 on days 7 and 14 of administration, respectively) were decreased significantly. The detection rate of lecithinase positive clostridia including Clostridium perfrigens showed a tendency to decrease during administration. No detectable change occurred in the levels of other organisms throughout the experimental period. Fecal concentrations of ammonia were decreased significantly (P < 0.05 and P < 0.01 on days 7 and 14 of administration, respectively). Fecal phenol (P < 0.001), p-cresol (P < 0.05), and skatol (P < 0.01) were reduced significantly on day 14 of administration compared to before administration. The amounts of fecal short chain fatty acids, acetic acid (P < 0.05) and lactic acid (P < 0.05) were increased significantly on day 14 of administration. The pH values were decreased slightly during administration. The odour of the feces was reduced remarkably during tea polyphenol administration.
authors.affiliation: Department of Food Hygiene, Nippon Veterinary and Animal Science University, Tokyo, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Hara
authors.forename: N
authors.initials: N
authors.lastname: Orita
authors.forename: S
authors.initials: S
authors.lastname: Hatano
authors.forename: H
authors.initials: H
authors.lastname: Ichikawa
authors.forename: Y
authors.initials: Y
authors.lastname: Hara
authors.forename: N
authors.initials: N
authors.lastname: Matsumoto
authors.forename: Y
authors.initials: Y
authors.lastname: Kimura
authors.forename: A
authors.initials: A
authors.lastname: Terada
authors.forename: T
authors.initials: T
authors.lastname: Mitsuoka
mesh_terms: D000818:Animals; D005243:Feces / Q000737:chemistry / Q000382:microbiology*; D005260:Female; D005419:Flavonoids; D010636:Phenols / Q000494:pharmacology*; D011108:Polymers / Q000494:pharmacology*; D059808:Polyphenols; D013552:Swine / Q000378:metabolism* / Q000382:microbiology*; D013662:Tea / Q000737:chemistry*
chemical_list: D005419:Flavonoids; D010636:Phenols; D011108:Polymers; D059808:Polyphenols; D013662:Tea