The genetic diversity of predominant Escherichia coli strains isolated from cattle fed various amounts of hay and grain
When the 16S rDNA of predominant Escherichia coli strains from cattle was digested with HhaI and HaeIII, the strains could be sub-divided into four operational taxonomic units. When genomic DNA was digested with XbaI, strains could be grouped into 24 pulsed-field gel electrophoresis genotypes (>9...
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| Veröffentlicht in: | FEMS microbiology ecology 2000-06, Vol.32 (3), p.225-233 |
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| creator | Jarvis, Graeme N Kizoulis, Menas G Diez-Gonzalez, Francisco Russell, James B |
| description | When the 16S rDNA of predominant Escherichia coli strains from cattle was digested with HhaI and HaeIII, the strains could be sub-divided into four operational taxonomic units. When genomic DNA was digested with XbaI, strains could be grouped into 24 pulsed-field gel electrophoresis genotypes (>95% Dice similarity) and five clades (>20% Dice similarity). Diet (hay versus grain) and gastrointestinal compartment (rumen versus colon) did not have a large impact on diversity. However, both analyses indicated that the cows (n=2) had different E. coli populations. When all 22 colonic strains were inoculated into a maltose-limited chemostat, only a single genotype persisted. Based on these results, the genetic diversity of E. coli in the cattle is very great and this bacterium can occupy different niches. |
| doi_str_mv | 10.1111/j.1574-6941.2000.tb00715.x |
| format | Article |
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When genomic DNA was digested with XbaI, strains could be grouped into 24 pulsed-field gel electrophoresis genotypes (>95% Dice similarity) and five clades (>20% Dice similarity). Diet (hay versus grain) and gastrointestinal compartment (rumen versus colon) did not have a large impact on diversity. However, both analyses indicated that the cows (n=2) had different E. coli populations. When all 22 colonic strains were inoculated into a maltose-limited chemostat, only a single genotype persisted. Based on these results, the genetic diversity of E. coli in the cattle is very great and this bacterium can occupy different niches.</description><identifier>ISSN: 0168-6496</identifier><identifier>EISSN: 1574-6941</identifier><identifier>DOI: 10.1111/j.1574-6941.2000.tb00715.x</identifier><language>eng</language><publisher>Delft: Oxford University Press</publisher><subject>Cattle ; Colon ; Deoxyribonucleic acid ; DNA ; E coli ; Ecology ; Electrophoresis ; Escherichia coli ; Gel electrophoresis ; Genetic diversity ; Genotypes ; Hay ; Maltose ; Microbiology ; Niches ; Pulsed-field gel electrophoresis ; rRNA 16S ; Similarity ; Strains (organisms)</subject><ispartof>FEMS microbiology ecology, 2000-06, Vol.32 (3), p.225-233</ispartof><rights>2000 Federation of European Microbiological Societies. Published by Elsevier Science B.V. 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| ispartof | FEMS microbiology ecology, 2000-06, Vol.32 (3), p.225-233 |
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| language | eng |
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| source | Wiley Blackwell Single Titles; Oxford Open; Alma/SFX Local Collection; EZB Electronic Journals Library |
| subjects | Cattle Colon Deoxyribonucleic acid DNA E coli Ecology Electrophoresis Escherichia coli Gel electrophoresis Genetic diversity Genotypes Hay Maltose Microbiology Niches Pulsed-field gel electrophoresis rRNA 16S Similarity Strains (organisms) |
| title | The genetic diversity of predominant Escherichia coli strains isolated from cattle fed various amounts of hay and grain |
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