Differentiation of Moraxella nonliquefaciens, M. lacunata, and M. bovis by using multilocus enzyme electrophoresis and hybridization with pilin-specific DNA probes.

AUTOR(ES)

Tønjum, T

RESUMO

Genetic relationships among strains of Moraxella nonliquefaciens, M. lacunata, and M. bovis were studied by using multilocus enzyme electrophoresis and DNA-DNA hybridization. The 74 isolates analyzed for electrophoretic variation at 12 enzyme loci were assigned to 59 multilocus genotypes. The multilocus genotypes were grouped in four major clusters, one representing strains of M. nonliquefaciens, two representing strains of M. lacunata, and one comprising strains of M. bovis and the single strain of M. equi analyzed. DNA-DNA hybridization with total genomic probes also revealed four major distinctive entities that corresponded to those identified by multilocus enzyme electrophoresis. The two distinct clusters recognized among the M. lacunata strains apparently corresponded to the species previously designated M. lacunata and M. liquefaciens. Distinction of the four entities was improved by hybridization with polymerase chain reaction products of nonconserved parts of pilin genes as DNA probes. With these polymerase chain reaction probes, new isolates of M. nonliquefaciens, M. lacunata, M. liquefaciens, and M. bovis can be identified easily by hybridization.

Documentos Relacionados

• BRO beta-lactamases of Branhamella catarrhalis and Moraxella subgenus Moraxella, including evidence for chromosomal beta-lactamase transfer by conjugation in B. catarrhalis, M. nonliquefaciens, and M. lacunata.
• Epidemiological typing of Moraxella catarrhalis by using DNA probes.
• Transcriptional regulation of type 4 pilin genes and the site-specific recombinase gene, piv, in Moraxella lacunata and Moraxella bovis.
• Differentiation of clinical isolates of Entamoeba histolytica by using specific DNA probes.
• Interesting sequence differences between the pilin gene inversion regions of Moraxella lacunata ATCC 17956 and Moraxella bovis Epp63.