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Journal of Clinical Microbiology, March 1998, p. 796-801, Vol. 36, No. 3
Laboratoire de Virologie Humaine et
Moléculaire,
Received 30 July 1997/Returned for modification 13 October
1997/Accepted 1 December 1997
A reverse transcription-PCR and hybridization-enzyme immunoassay
(RT-PCR-EIA) has been developed to identify the major agents of
bronchiolitis in infants: respiratory syncytial viruses A and B (RSVA
and RSVB) and parainfluenzavirus 3 (PIV3). Two primer sets (P1-P2 and
P1-P3) were selected in a conserved region of the polymerase L gene. In
infected cell cultures, this method detected RSVA (n = 14), RSVB (n = 13), and PIV3 (n = 13), with the exclusion of PIV1 (n = 4), PIV2
(n = 3), measles virus (n = 6), mumps
virus (n = 4), influenza A virus (n = 11), and influenza B virus (n = 4). The
differentiation of the amplicons by restriction fragment length
polymorphism (RFLP) showed a PvuII site for PIV3 strains
and an AvaII site for RSV strains, with RSVA distinguished from RSVB by BglII. The hybridization-EIA, using three
internal probes specific for each virus, correlated with the
immunofluorescence assay (IFA) and RFLP results. Clinical aspirates
from 261 infants hospitalized with bronchiolitis were tested by IFA,
viral isolation technique (VIT), and RT-PCR-EIA. RT-PCR-EIA detected
RSV sequences in 103 samples (39.4%), and IFA-VIT detected RSV
sequences in 109 cases (41.7%). A few samples (2.6%) were IFA-VIT
positive but PCR negative, and one sample was RT-PCR-EIA positive only. RT-PCR-EIA detected PIV3 sequences in 14 of the 15 IFA-VIT-positive isolates. The two methods showed very good correlation (96.9%), but
RT-PCR-EIA was clearly more efficient in typing, leaving 5% non-A,
non-B isolates, while IFA failed to resolve 23% of the isolates. The
two methods contradicted each other for <5% of the isolates.
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
Detection of Respiratory Syncytial Virus A and B
and Parainfluenzavirus 3 Sequences in Respiratory Tracts of Infants by
a Single PCR with Primers Targeted to the L-Polymerase Gene and
Differential Hybridization
*
Corresponding author. Mailing address: Laboratoire de
Virologie Humaine et Moléculaire, Hopital Universitaire, avenue
G. Clémenceau, 14033 Caen, France. Phone: (33) 02 31 27 25 54. Fax: (33) 02 31 27 25 57. E-mail: freymuth{at}criuc.unicaen.fr.
Journal of Clinical Microbiology, March 1998, p. 796-801, Vol. 36, No. 3
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
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