Document Detail


Occurrence of sulphate-reducing bacteria in human faeces and the relationship of dissimilatory sulphate reduction to methanogenesis in the large gut.
MedLine Citation:
PMID:  3204069     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Sulphate-reducing bacteria (SRB) were enumerated in 40 faecal samples obtained from two different human populations in the United Kingdom and rural South Africa. Species able to metabolize acetate, lactate, propionate, butyrate, H2/CO2, succinate, pyruvate, valerate, ethanol and a glutamate/serine/alanine mixture were found in faeces from both populations. Although a variety of nutritionally and morphologically distinct species of SRB belonging to the genera Desulfotomaculum, Desulfobacter, Desulfomonas and Desulfobulbus were identified, Desulfovibrio types always predominated. Significant numbers of SRB were present only in faecal samples from subjects whose breath methane excretion was low or undetectable. Reduced or absent methanogenesis in the presence of SRB was confirmed in fermentation studies with faecal slurries. Fourteen of 20 (70%) British faecal samples contained SRB and the remainder produced methane. The reverse was the case with 20 rural black South Africans, where only three (15%) of the samples had significant levels of SRB; the remaining 85% produced methane. These results suggest that to a large extent, dissimilatory sulphate reduction and methanogenesis are mutually exclusive in the human large gut.
Authors:
G R Gibson; G T Macfarlane; J H Cummings
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of applied bacteriology     Volume:  65     ISSN:  0021-8847     ISO Abbreviation:  J. Appl. Bacteriol.     Publication Date:  1988 Aug 
Date Detail:
Created Date:  1989-02-03     Completed Date:  1989-02-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7503050     Medline TA:  J Appl Bacteriol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  103-11     Citation Subset:  IM    
Affiliation:
Medical Research Council, Dunn Clinical Nutrition Centre, Cambridge, UK.
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MeSH Terms
Descriptor/Qualifier:
Breath Tests
Desulfovibrio / isolation & purification,  metabolism*
Ethnic Groups
Euryarchaeota / isolation & purification,  metabolism*
Feces / microbiology*
Gram-Negative Anaerobic Bacteria / isolation & purification,  metabolism
Great Britain
Humans
Intestine, Large / metabolism,  microbiology*
Methane / biosynthesis
Oxidation-Reduction
South Africa
Sulfates / metabolism*
Chemical
Reg. No./Substance:
0/Sulfates; 74-82-8/Methane

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


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