Document Detail

Breath hydrogen concentrations of cats given commercial canned and extruded diets indicate gastrointestinal microbial activity vary with diet type.
MedLine Citation:
PMID:  12042520     Owner:  NLM     Status:  MEDLINE    
Breath hydrogen (H(2)) concentration, an indicator of intestinal microbial abundance, was determined in cats given purified and commercial canned and dry-type diets. Before measurements, the cats were fed diets for more than 2 wk and habituated to a daily feeding interval of 4 hr. Breath H(2) concentrations were determined before a meal (approximately 25% daily MER) and then every 20 min for 8 hr or hourly for 10 hr. A clear rise above baseline breath H(2) concentrations, 1-2 ppm, was not observed in 6 males given a casein-based purified diet. A mean (+/- SEM) peak breath H(2) concentration of 22 +/- 4 ppm was observed in 6 other males, 6.3 hr after ingestion of a canned diet with protein, fat, and carbohydrate proportions similar to those of the purified diet. Area-under-the-curve (AUC) breath H(2) responses to the canned diet were substantially greater (p < 0.05) than responses observed in 5 males given a dry-type diet, but similar to responses observed in 12 males given an uncooked form of the canned diet. Gamma irradiation to inactivate microbes in the uncooked diet did not affect the breath H(2) response. Breath H(2) responses to 2 other canned and 2 other dry-type diets were evaluated in 8 adult females using a 4 x 4 Latin-square design. Peak and AUC responses to the canned diets were similar but approximately 2 times greater (p < 0.05) than responses to the dry diets. Relative to dry-type diets, canned diets induce a substantially greater breath H(2) production, and therefore appear to support a greater intestinal microbial population.
Robert C Backus; Lisa M Puryear; Barbara A Crouse; Vincent C Biourge; Quinton R Rogers
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of nutrition     Volume:  132     ISSN:  0022-3166     ISO Abbreviation:  J. Nutr.     Publication Date:  2002 Jun 
Date Detail:
Created Date:  2002-06-03     Completed Date:  2002-07-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0404243     Medline TA:  J Nutr     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1763S-6S     Citation Subset:  IM    
Department of Molecular Biosciences, University of California, Davis, CA, USA.
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MeSH Terms
Animal Feed*
Breath Tests*
Caseins / administration & dosage,  pharmacology
Cats / physiology*
Clostridium perfringens / isolation & purification
Colony Count, Microbial
Digestive System / microbiology*
Food Preservation*
Hydrogen / analysis*
Osmolar Concentration
Reg. No./Substance:
0/Caseins; 1333-74-0/Hydrogen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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