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Appl. Environ. Microbiol., 04 1997, 1256-1260, Vol 63, No. 4
RJ Forster, J Gong and RM Teather
Oligonucleotide probes covering three phylogenetically defined groups of
Butyrivibrio spp. were successfully designed and tested. The specificity of
each probe was examined by hybridization to rRNAs from an assortment of B.
fibrisolvens isolates as well as additional ruminal and nonruminal
bacteria. The sensitivity of the hybridization method was determined by
using one of the probes (probe 156). When RNA was extracted from a culture
of OB156, the probe was able to detect target cells at densities as low as
10(4) cells/ml. When 10(4) or more target cells/ml were added to cattle
rumen samples, detectable hybridization signals were obtained with 1,000 ng
of total RNA loaded onto the nylon membrane. In contrast, the sensitivity
was reduced to 10(6) target cells/ml at 100 ng of RNA per slot. The probes
were used to type 19 novel Butyrivibrio isolates. The phylogenetic
placement was confirmed by partial 16S rRNA gene sequencing. The use of the
probes in community- based studies indicated that the Butyrivibrio groups
examined in this paper did not represent a significant portion of the
bacterial 16S rRNA pool in the rumen of the cattle, sheep, and deer
examined.
Copyright © 1997, American Society for Microbiology
Group-specific 16S rRNA hybridization probes for determinative and community structure studies of Butyrivibrio fibrisolvens in the rumen
Centre for Food and Animal Research, Agriculture and Agri-Food Canada, Ottawa, Ontario, Canada. forster@em.agr.ca
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