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Journal of Clinical Microbiology, Mar 1997, 600-608, Vol 35, No. 3
B Hjelle, S Jenison, N Torrez-Martinez, B Herring, S Quan, A Polito, S Pichuantes, T Yamada, C Morris, F Elgh, HW Lee, H Artsob and R Dinello
To develop a rapid antibody test for Sin Nombre hantavirus (SNV) infection
for diagnosis of hantavirus pulmonary syndrome (HPS) in field settings
where advanced instrumentation is not available, a strip immunoblot assay
bearing four immobilized antigens for SNV and a recombinant nucleocapsid
protein antigen of Seoul hantavirus (SEOV) was prepared. The SNV antigens
included a full-length recombinant-expressed nucleocapsid (N) protein (rN),
a recombinant-expressed G1 protein (residues 35 to 117), and synthetic
peptides derived from N (residues 17 to 59) and G1 (residues 55 to 88). On
the basis of the observed reactivities of hantavirus-infected patient and
control sera, we determined that a positive assay requires reactivity with
SNV or SEOV rN antigen and at least one other antigen. Isolated reactivity
to either viral rN antigen is indeterminate, and any pattern of reactivity
that does not include reactivity to an rN antigen is considered
indeterminate but is unlikely to represent hantavirus infection. Fifty-
eight of 59 samples from patients with acute SNV-associated HPS were
positive according to these criteria, and one was initially indeterminate.
Four of four samples from patients with HPS due to other hantaviruses were
positive, as were most samples from patients with SEOV and Puumala virus
infections. Of 192 control serum samples, 2 (1%) were positive and 2 were
indeterminate. Acute SNV infection was distinguishable from remote SNV
infection or infection with hantaviruses other than SNV by the presence of
G1 peptide antigen reactivities in the former. The strip immunoblot assay
shows promise for the detection of SNV antibodies early in the course of
HPS.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Rapid and specific detection of Sin Nombre virus antibodies in patients with hantavirus pulmonary syndrome by a strip immunoblot assay suitable for field diagnosis
Department of Pathology, University of New Mexico School of Medicine, Albuquerque 87131-5301, USA. Hjelle@somasf.unm.edu
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