Quantitative determination of H2-utilizing acetogenic and sulfate-reducing bacteria and methanogenic archaea from digestive tract of different mammals.
Abstract: Total number of bacteria, cellulolytic bacteria, and H2-utilizing microbial populations (methanogenic archaea, acetogenic and sulfate-reducing bacteria) were enumerated in fresh rumen samples from sheep, cattle, buffaloes, deer, llamas, and caecal samples from horses. Methanogens and sulfate reducers were found in all samples, whereas acetogenes were not detected in some samples of each animal. Archaea methanogens were the largest H2-utilizing populations in all animals, and a correlation was observed between the numbers of methanogens and those of cellulolytic microorganisms. Higher counts of acetogens were found in horses and llamas (1 x 10(4) and 4 x 10(4) cells ml-1 respectively).
Publication Date: 1996-03-01 PubMed ID: 8704656DOI: 10.1007/s002849900023Google Scholar: Lookup
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Summary
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This research explores the presence and quantity of certain microorganisms within the digestive tracts of different animals. The study specifically focuses on bacteria that utilize hydrogen (H2) sourced from animals such as sheep, buffalo, deer, llamas, and horses.
Research Scope and Method
- The researchers primarily focused on investigating the total number of bacteria, cellulolytic bacteria, and H2-utilizing microbial populations in these animals’ digestive systems.
- The study specifically looked at three types of H2-utilizing microorganisms: Methanogenic archaea, acetogenic bacteria, and sulfate-reducing bacteria.
- To collect data, fresh rumen samples (the first stomach in ruminants) were collected from sheep, cattle, buffaloes, deer, and llamas, while caecal samples (the pouch connected to the junction of the small and large intestines) were taken from horses.
Findings
- The research determined that methanogens (a type of microorganism that produces methane) and sulfate reducers were present in all samples.
- In contrast, acetogenes (bacteria that produce acetic acid from CO2 and H2) were not found in some samples from each animal.
- Among all H2-utilizing populations, archaea methanogens were the most populous across all animal samples.
- Interestingly, researchers also found a link between the numbers of methane-producing organisms and those of cellulolytic microorganisms (those that break down cellulose).
Variances
- Different animal species showed variation in the presence and count of certain types of bacterial populations.
- For instance, higher counts of acetogens were found in horse and llama samples, with 1 x 10(4) and 4 x 10(4) cells ml-1 respectively.
Significance of the Study and Future Research
- This research contributes to understanding the symbiotic relationship between mammals and microbial populations in their digestive tracts. This relationship plays a key role in the animals’ ability to digest food properly and is crucial to their survival.
- By gaining insights into these microbial populations and their variations across different mammalian species, scientists can improve the nutrition and health management of livestock. This can lead to improvements in agricultural practices, livestock productivity, and also help in the mitigation of environmental impact due to livestock farming.
- Future research should focus on understanding why certain H2-utilizing microbial populations are more prevalent in some species than others, and how this knowledge can be leveraged to improve livestock health and productivity.
Cite This Article
APA
Morvan B, Bonnemoy F, Fonty G, Gouet P.
(1996).
Quantitative determination of H2-utilizing acetogenic and sulfate-reducing bacteria and methanogenic archaea from digestive tract of different mammals.
Curr Microbiol, 32(3), 129-133.
https://doi.org/10.1007/s002849900023 Publication
Researcher Affiliations
- Laboratoire de Microbiologie, INRA-C.R. de Clermont-Ferrand-Theix, Saint-Genès-Champanelle, France.
MeSH Terms
- Acetates / metabolism
- Animals
- Bacteria / isolation & purification
- Bacteria / metabolism
- Cattle
- Cellulose / metabolism
- Euryarchaeota / isolation & purification
- Euryarchaeota / metabolism
- Horses / microbiology
- Hydrogen / metabolism
- Intestines / microbiology
- Sheep / microbiology
- Sulfates / metabolism
Citations
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