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Journal of Clinical Microbiology, 02 1995, 318-321, Vol 33, No. 2
T Ziegler, H Hall, A Sanchez-Fauquier, WC Gamble and NJ Cox
A rapid culture assay which allows for the simultaneous typing and
subtyping of currently circulating influenza A(H1N1), A(H3N2), and B
viruses in clinical specimens was developed. Pools of monoclonal antibodies
(MAbs) against influenza A and B viruses and MAbs HA1-71 and HA2-76,
obtained by immunizing mice with the denatured hemagglutinin subfragments
HA1 and HA2 of influenza virus A/Victoria/3/75, were used for
immunoperoxidase staining of antigens in infected MDCK cells. MAb HA1-71
reacted exclusively with influenza A viruses of the H3 subtype, while MAb
HA2-76 reacted with subtypes H1, H3, H4, H6, H8, H9, H10, H11, and H12, as
determined with 78 human, 4 swine, and 10 avian influenza virus reference
strains subtyped by the hemagglutination inhibition test. To determine if
the technique can be used as a rapid diagnostic test, 263 known influenza
virus-positive frozen nasal or throat swabs were inoculated into MDCK
cells. After an overnight incubation, the cells were fixed and viral
antigens were detected by immunoperoxidase staining. Influenza A viruses of
the H1 and H3 subtypes were detected in 31 and 113 specimens, respectively.
The subtypes of 10 influenza A virus-positive specimens could not be
determined because they contained too little virus. Influenza B viruses
were detected in 84 specimens, and 25 specimens were negative. We conclude
that this assay is a rapid, convenient, non-labor-intensive, and relatively
inexpensive test for detecting, typing, and subtyping influenza viruses in
clinical specimens.
Copyright © 1995 by the American Society for Microbiology. All rights reserved.
Type- and subtype-specific detection of influenza viruses in clinical specimens by rapid culture assay
Influenza Branch, Centers for Disease Control and Prevention, Atlanta, Georgia 30333.
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