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    Frear, Craig Wang, Zhi-Wu Li, Chenlin and Chen, Shulin 2011. Biogas potential and microbial population distributions in flushed dairy manure and implications on anaerobic digestion technology. Journal of Chemical Technology & Biotechnology, Vol. 86, Issue. 1, p. 145.

    Edwards, J. E. Huws, S. A. Kim, E. J. Lee, M. R. F. Kingston-Smith, A. H. and Scollan, N. D. 2008. Advances in microbial ecosystem concepts and their consequences for ruminant agriculture. animal, Vol. 2, Issue. 05,

    Nobile, Clarissa J. and Mitchell, Aaron P. 2006. Genetics and genomics of Candida albicans biofilm formation. Cellular Microbiology, Vol. 8, Issue. 9, p. 1382.

    Currie, C. R. Bot, A. N. M. and Boomsma, J. J. 2003. Experimental evidence of a tripartite mutualism: bacteria protect ant fungus gardens from specialized parasites. Oikos, Vol. 101, Issue. 1, p. 91.

    Ziemer, Cherie J. Sharp, Richard Stern, Marshall D. Cotta, Michael A. Whitehead, Terence R. and Stahl, David A. 2000. Comparison of microbial populations in model and natural rumens using 16S ribosomal RNA-targeted probes. Environmental Microbiology, Vol. 2, Issue. 6, p. 632.

    Barbosa, Teresa M. Scott, Karen P. and Flint, Harry J. 1999. Evidence for recent intergeneric transfer of a new tetracycline resistance gene, tet(W), isolated from Butyrivibrio fibrisolvens, and the occurrence of tet(O) in ruminal bacteria. Environmental Microbiology, Vol. 1, Issue. 1, p. 53.

  • Print publication year: 1995
  • Online publication date: November 2009

13 - Biofilms of the Ruminant Digestive Tract



Direct observations of microbial growth in a large number of natural ecosystems have shown that the predominant populations are attached to surfaces where they grow in glycocalyx enclosed microcolonies that develop into adherent biofilms (Costerton et al. 1987; Cheng et al. 1991; Lappin-Scott et al. 1992). In various digestive tracts, this adhesion takes the form of very specific associations with insoluble nutrients (Cheng et al. 1977; Akin 1979; Cheng et al. 1991) to form particle associated microbial populations, and with tissue surfaces to form tissue associated populations (Cheng & Costerton 1980; Cheng et al. 1981a, b). A variation of this latter mode of growth is the association of a major microbial population with the mucous blanket of secretory intestinal tissue (Rozee et al. 1982). Bacteria of the ruminant digestive tract can be divided into three distinct subpopulations, (i) those associated with the digesta, (ii) those associated with gastrointestinal tissue and (iii) those associated with gastrointestinal fluid (Cheng & Costerton 1980; Cheng et al. 1981a; Czerkawski & Cheng 1988).

General principles of microbial ecology dictate that any organism will establish itself in a favourable nutrient niche and proliferate within a physiologically integrated community. Our observations of the growth of bacteria associated with feed particles indicate that each species adheres to its own particular insoluble substrate (e.g. cellulose, protein, starch) and produces enzymes to degrade insoluble substrates to soluble nutrients (Cheng et al. 1984; McAllister et al. 1990b).

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Microbial Biofilms
  • Online ISBN: 9780511525353
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