SUMMARY: Acid phosphatase, esterases, and glutamate and malate dehydrogenases of 192 strains of were analysed by horizontal polyacrylamide agarose gel electrophoresis and by isoelectrofocusing in thin-layer polyacrylamide gels. The six species were clearly separated from each other by their distinct enzyme electrophoretic polymorphism. For , the strains of biotype 5 were differentiated from the other biotypes by the mobility of glutamate dehydrogenase. For , six zymotypes were delineated by pI and by the mobility of the enzymes. Variation in number or mobility of esterases within each species could represent a marker for epidemiological and ecological analyses. A linear relationship was obtained between the mean genetic diversity coefficient of enzymes and the mean percentage DNA-DNA relatedness of and


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