Specificity of six gene sequences for the detection of the genus Brucella by DNA amplification - PubMed (original) (raw)
Comparative Study
Specificity of six gene sequences for the detection of the genus Brucella by DNA amplification
M Da Costa et al. J Appl Bacteriol. 1996 Sep.
Abstract
DNA extracted from all Brucella species, reference and vaccine strains were amplified by PCR using primers specific for the genes encoding a 31-kDa Brucella protein, the heat shock proteins (DnaJ, DnaK, HtrA and GroEL) and 16S RNA. No difference was found between Brucella species and biovars with all primer pairs used, even after restriction enzyme analysis of the amplified fragments. The specificity of the amplified products was confirmed by hybridization with a digoxigenin 3'-labelled specific probe and by PCR using 98 non-Brucella micro-organisms' DNA. Only Ochrobactrum anthropi and Phyllobacterium spp. yielded a PCR product by using 31-kDa DnaK, DnaJ, GroEL and 16S RNA primers. After hybridization and restriction analysis, 16S RNA fragments of 3301 and 3331 O. anthropi strains showed a total similarity to those from Brucella. A similar result was shown with DnaJ fragments obtained with 3301 strain of O. anthropi after EcoRI digestion.
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