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Journal of Clinical Microbiology, 10 1996, 2559-2568, Vol 34, No. 10
Copyright © 1996 by the American Society for Microbiology. All rights reserved.

Multicentric epidemiological study of Aspergillus fumigatus isolates by multilocus enzyme electrophoresis

E Rodriguez, T De Meeus, M Mallie, F Renaud, F Symoens, P Mondon, MA Piens, B Lebeau, MA Viviani, R Grillot, N Nolard, F Chapuis, AM Tortorano and JM Bastide
Laboratoire d'Immunologie et Parasitologie, Faculte de Pharmacie, Montpellier, France.

The genotypes of 63 isolates of Aspergillus fumigatus obtained from three hospitals in different geographical areas and of eight culture collection strains were determined by multilocus enzyme electrophoresis. Twelve of the 17 enzymatic loci studied were polymorphic, giving rise to 48 different electrophoretic types. The existence of fixed multilocus genotypes, significant heterozygote deficits and excesses at the different loci, and linkage disequilibria within subpopulations strongly suggests a clonal reproduction mode for A. fumigatus. Numerical analysis of the comparison and disposition of the different electrophoretic types demonstrates a significant genetic differentiation between the three sampling sites. However, no correlation could be found between geographical distances and genetic differentiation. On account of the multiple discriminatory markers, multilocus enzyme electrophoresis typing seems to be a very powerful tool for epidemiological and reproductive mode studies of A. fumigatus.


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