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Journal of Clinical Microbiology, Dec 1995, 3252-3256, Vol 33, No. 12
MN Mulders, AM van Loon, HG van der Avoort, JH Reimerink, A Ras, TM Bestebroer, MA Drebot, OM Kew and MP Koopmans
An outbreak of poliomyelitis due to wild poliovirus type 3 (PV3) occurred
in an unvaccinated community in The Netherlands between September 1992 and
February 1993. The outbreak involved 71 patients. The aim of this study was
to characterize the virus at the molecular level and to analyze the
molecular evolution of the epidemic virus. Molecular analysis was carried
out by sequencing the VP1/2A junction region (150 nucleotides) of 50 PV3
strains isolated in association with this outbreak and the entire VP1 gene
of 14 strains. In addition, the sequence of the VP1/2A junction region of
strains from geographical regions endemic for PV3 (Egypt, India, and
Central Asia) was analyzed and compared with the nucleotide sequence of the
epidemic strain from The Netherlands. The earliest isolate was obtained
from river water sampled 3 weeks before diagnosis of the first
poliomyelitis patient and was found by VP1/2A sequence analysis to be
genetically identical to the strain isolated from the first patient.
Sequence divergence among the strains from the epidemic in The Netherlands
was less than 2%. The closest genetic similarity (97.3%) was found with an
Indian isolate (New Delhi, December 1991), indicating the likely source of
the virus. A more than 99% sequence similarity was found in the VP1/2A
region. Finally, the sequence information was used to design primers for
the specific and highly sensitive molecular detection of PV3 strains during
the epidemic.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Molecular characterization of a wild poliovirus type 3 epidemic in The Netherlands (1992 and 1993)
Laboratory of Virology, World Health Organization Collaborating Centre for Reference and Research on Poliomyelitis, National Institute of Public Health and the Environment (RIVM), Bilthoven, The Netherlands. mulders@rivm.nl
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