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Journal of Clinical Microbiology, May 2001, p. 1922-1927, Vol. 39, No. 5
0095-1137/01/$04.00+0   DOI: 10.1128/JCM.39.5.1922-1927.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.

Comparison of Flavivirus Universal Primer Pairs and Development of a Rapid, Highly Sensitive Heminested Reverse Transcription-PCR Assay for Detection of Flaviviruses Targeted to a Conserved Region of the NS5 Gene Sequences

Natale Scaramozzino,1 Jean-Marc Crance,1 Alain Jouan,1 Dominique A. DeBriel,2 Françoise Stoll,3 and Daniel Garin1,*

Unité de Virologie, Centre de Recherches du Service de Santé des Armées (CRSSA) Emile Pardé, Grenoble,1 Hôpital Pasteur, Colmar,2 and Université Louis Pasteur, Strasbourg,3 France

Received 14 August 2000/Returned for modification 29 December 2000/Accepted 1 March 2001

Arthropod-transmitted flaviviruses are responsible for considerable morbidity and mortality, causing severe encephalitic, hemorrhagic, and febrile illnesses in humans. Because there are no specific clinical symptoms for infection by a determined virus and because different arboviruses could be present in the same area, a genus diagnosis by PCR would be a useful first-line diagnostic method. The six published Flavivirus genus primer pairs localized in the NS1, NS3, NS5, and 3' NC regions were evaluated in terms of specificity and sensitivity with flaviviruses (including the main viruses pathogenic for humans) at a titer of 105 50% tissue culture infectious doses (TCID50s) ml-1 with a common identification step by agarose gel electrophoresis. Only one NS5 primer pair allowed the detection of all tested flaviviruses with the sensitivity limit of 105 TCID50s ml-1. Using a heminested PCR with new primers designed in the same region after an alignment of 30 different flaviviruses, the sensitivity of reverse transcription-PCR was improved and allowed the detection of about 200 infectious doses ml-1 with all of the tick- and mosquito-borne flaviviruses tested. It was confirmed that the sequenced amplified products in the NS5 region allowed predictability of flavivirus species by dendrogram, including the New York 99 West Nile strain. This technique was successfully performed with a cerebrospinal fluid sample from a patient hospitalized with West Nile virus encephalitis.

* Corresponding author. Mailing address: CRSSA, 24 Avenue des Maquis du Grésivaudan, BP87, 38702 La Tronche Cedex, France. Phone: 33-476-63-68-44. Fax: 33-476-63-69-17. E-mail: Daniel.Garin{at}wanadoo.fr.

Journal of Clinical Microbiology, May 2001, p. 1922-1927, Vol. 39, No. 5
0095-1137/01/$04.00+0   DOI: 10.1128/JCM.39.5.1922-1927.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.


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Copyright © 2001 by the American Society for Microbiology. All rights reserved.