Effect of tea polyphenols on fecal flora and fecal metabolic products of pigs.
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.
Hara
H
H
Department of Food Hygiene, Nippon Veterinary and Animal Science University, Tokyo, Japan.
Orita
N
N
Hatano
S
S
Ichikawa
H
H
Hara
Y
Y
Matsumoto
N
N
Kimura
Y
Y
Terada
A
A
Mitsuoka
T
T
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*
D005419:Flavonoids; D010636:Phenols; D011108:Polymers; D059808:Polyphenols; D013662:Tea