Journal of Clinical Microbiology, Dec 1996, 2869-2874, Vol 34, No. 12
M Takayama, N Takayama, N Inoue and Y Kameoka
Restriction fragment length polymorphism (RFLP) analysis of whole viral DNA
of varicella-zoster virus (VZV) requires the time-consuming and laborious
preparation of a large amount of purified viral DNA. RFLP analysis of small
DNA fragments amplified by PCR was developed as an alternative method.
However, its use has been limited because of the small number of variations
in VZV. To overcome these drawbacks and to identify variations in VZV, we
developed an RFLP analysis method combined with the long PCR method which
has recently been developed for the amplification of DNA fragments between
5 and 35 kb in length. We amplified three DNA regions ranging from 6.8 to
11.4 kb and demonstrated that RFLP analyses of these regions allowed for
the classification of 40 VZV isolates in Japan into 17 groups. One-fourth
of the isolates contained a nucleotide difference of C versus T, which
abolished the StyI site at position 76530; this alteration was linked to
the reported PstI site polymorphism at position 69349 (nucleotide positions
are based on those of strain Dumas). Nucleotide sequence variation in the
examined regions among VZV isolates in Japan was estimated at roughly less
than 0.05%, confirming the previously proposed idea that VZV is genetically
stable and not highly diversified. Our method will be useful for studies of
the molecular epidemiology of VZV.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Application of long PCR method of identification of variations in nucleotide sequences among varicella-zoster virus isolates
Department of Virology I, National Institute of Health, Tokyo, Japan.
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