title: Effect of fermented soy product on the fecal microbiota of rats fed on a beef-based animal diet.
abstract: BACKGROUND
  The aim of this study was to determine whether the consumption of soy product fermented with Enterococcus faecium CRL 183, would modify the fecal microbiota of rats fed a diet containing red meat. The rats were placed in groups, distinguished by their diets. For 60 days, group I was given a standard casein-based rodent feed and groups II-VI, the beef-based feed. From the 30th day, groups III-VI also ingested the following products: group III, E. faecium-fermented soy product; group IV, pure suspension of E. faecium; group V, sterilized fermented soy product; and group VI, unfermented soy product.
  
  
  RESULTS
  Rats that ingested fermented soy product showed a slight increase in the numbers of lactobacilli (0.45 log CFU g(-1)), as did the casein-based diet group (0.47 log CFU g(-1)). The fermented soy product did not cause any reduction in the number of enterobacteria or clostridia, but promoted a slight fall in the viable count of Bacteroides spp. (2.80 +/- 0.20 to 2.34 +/- 0.07 log CFU g(-1)).
  
  
  CONCLUSIONS
  The results indicate that the ingestion of this fermented soy product did not lead to significant changes in the fecal microbiota of the rats fed on a beef-based diet.
authors.affiliation: Department of Food and Nutrition, Sao Paulo State University, Araraquara-SP, Brazil. raquelbedani@yahoo.com.br
authors.forename: Raquel
authors.initials: R
authors.lastname: Bedani
authors.forename: Nadiége D
authors.initials: ND
authors.lastname: Pauly-Silveira
authors.forename: Mariana N
authors.initials: MN
authors.lastname: Roselino
authors.forename: Graciela F
authors.initials: GF
authors.lastname: de Valdez
authors.forename: Elizeu A
authors.initials: EA
authors.lastname: Rossi
mesh_terms: D000818:Animals; D001419:Bacteria / Q000187:drug effects*; D001439:Bacteroides / Q000187:drug effects; D002364:Caseins; D002417:Cattle; D003013:Clostridium / Q000187:drug effects; D003106:Colon / Q000382:microbiology*; D004032:Diet; D004755:Enterobacteriaceae / Q000187:drug effects; D016984:Enterococcus faecium; D005243:Feces / Q000382:microbiology*; D005285:Fermentation; D005516:Food Microbiology; D007778:Lactobacillus / Q000187:drug effects; D008297:Male; D008460:Meat; D051381:Rats; D017208:Rats, Wistar; D041942:Soy Milk / Q000494:pharmacology*
chemical_list: D002364:Caseins