Abstract:
:As contagious bovine pleuropneumonia (CBPP) is spreading fast in many African countries, there is an increasing demand for rapid and sensitive diagnostic methods that can be used to confirm the initial diagnosis based on clinical symptoms or pathological findings. Two PCR-based diagnostic systems for identification of the infectious agent, Mycoplasma mycoides subsp. mycoides SC (M. mycoides SC), in various samples are presented. Both systems involve group-specific amplification of the two 16S rRNA genes from mycoplasmas of the M. mycoides cluster. The laser-induced fluorescence assay is based on a unique sequence length difference between the two 16S rRNA genes in M. mycoides SC. This region was amplified by PCR, and the products were separated by polyacrylamide gel electrophoresis in a DNA sequencer. The resulting electropherogram showed two peaks for strains of M. mycoides SC and one peak for all other members of the M. mycoides cluster. The second system was based on restriction endonuclease analysis and agarose gel electrophoresis. Restriction of amplicons from a region containing a polymorphism, which is found in M. mycoides SC only, resulted in an extra band on the agarose gel because an AluI site is lacking in the rrnA operon. Specimens from cows with postmortem signs of CBPP were analyzed with the two PCR systems. M. mycoides SC was clearly identified in pleural fluid and lung tissue, and the methods were found to be robust and rapid. The results were in agreement with those obtained by conventional diagnostic techniques.
journal_name
J Clin Microbioljournal_title
Journal of clinical microbiologyauthors
Persson A,Pettersson B,Bölske G,Johansson KEdoi
10.1128/JCM.37.12.3815-3821.1999subject
Has Abstractpub_date
1999-12-01 00:00:00pages
3815-21issue
12eissn
0095-1137issn
1098-660Xjournal_volume
37pub_type
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