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Journal of Clinical Microbiology, 01 1996, 159-164, Vol 34, No. 1
HT Agostini, CF Ryschkewitsch and GL Stoner
The human polyomavirus JC (JCV) causes the central demyelinating disease
progressive multifocal leukoencephalopathy in about 5% of AIDS patients. To
characterize the type profile of JCV in a control population in the United
States, 54 females (10 to 79 years of age; average age, 43.4 years) and 51
males (18 to 94 years of age; average age, 47.9 years) were examined for
the excretion of different genotypes of JCV in their urine by PCR followed
by direct cycle sequencing. The group consisted of 89 patients of a general
medical clinic in addition to 16 healthy volunteers. The overall incidence
of JC viruria was 43 of 105 (40.9%) subjects, with a marked increase for
those subjects above the age of 30 years. Two men were found to excrete two
different types of JCV at the same time, indicating double infections. Of
the three different genotypes of JCV identified to date, type 1 strains
(European) were the most common in this cohort (64% of total strains)
followed by type 2 (East Asian) (18%). No type 3 (East African) strains
were detected. Indirect evidence for the existence of JCV type 3 was found
in seven individuals (16%) in the form of a type 1/3 recombinant (also
called type 4). In addition, a single example of JCV which differs from
types 1, 2, and 3 and may represent a phylogenetically older type (type 5)
was found in a 59-year-old African-American. Delineation of sequence
variations between JCV types is essential for the design of primers for
sensitive PCR with clinical samples.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Genotype profile of human polyomavirus JC excreted in urine of immunocompetent individuals
Laboratory of Experimental Neuropathology, National Institute of Neurological Disorders and Stroke, Bethesda, Maryland 20892-4126, USA.
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