[multiple-locus variable number tandem repeat analysis of bordetella pertussis strains collected in the czech republic in 1967-2015: spread of a variant adapted to the population with a high vaccination coverage].to perform multiple-locus variable number tandem repeat analysis (mlva) of b. pertussis strains from the collection of the national reference laboratory for diphtheria and pertussis (nrl/dipe), national institute of public health (niph), prague. the study strains were isolated from clinical specimens collected mostly in the czech republic over a nearly 50-year period from 1967 to 2015 (june). the isolates from three periods characterized by different vaccination strategies and trends in pertussi ...201727467327
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