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1991:
Boerlin P; Rocourt J; Piffaretti J C
Taxonomy of the genus Listeria by using multilocus enzyme electrophoresis.
International journal of systematic bacteriology 1991;
41(
1):.
Seventy-three strains of the seven recognized Listeria species were studied by performing a multilocus enzyme electrophoresis analysis of 18 enzyme loci. The mean number of alleles per locus was 9.5 and all of the loci were polymorphic. A total of 56 electrophoretic types were distinguished. Cluster analysis of a matrix of the genetic distances between paired electrophoretic types revealed that there were six principal clusters at the species level (genetic distances between clusters greater than 0.8). Listeria monocytogenes, Listeria innocua, Listeria welshimeri, Listeria seeligeri, and Listeria ivanovii each corresponded to one of these clusters with no overlap. Our results are in agreement with those of previous DNA hybridization experiments (Rocourt et al., Curr. Microbiol. 7:383-388, 1982). Listeria grayi and Listeria murrayi electrophoretic types formed a unique cluster, thus reinforcing the suggestion of Wilkinson and Jones (J. Gen. Microbiol. 98:399-421, 1977) that these two species should be considered two biovars of a single species.
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