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Journal of Clinical Microbiology, July 2004, p. 3030-3035, Vol. 42, No. 7
0095-1137/04/$08.00+0     DOI: 10.1128/JCM.42.7.3030-3035.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

High Prevalence of Hepatitis C Virus Type 5 in Central France Evidenced by a Prospective Study from 1996 to 2002

Cécile Henquell,^1* Carole Cartau,¹ Armand Abergel,² Henri Laurichesse,³ Christel Regagnon,¹ Christophe De Champs,^1,4 Jean-Luc Bailly,¹ and Hélène Peigue-Lafeuille¹

Laboratoire de Virologie, Faculté de Médecine, 63001 Clermont-Ferrand Cedex,¹ Service d'Hépato-Gastroentérologie,² Service des Maladies Infectieuses et Tropicales, Centre Hospitalier Universitaire, BP 69, 63003 Clermont-Ferrand Cedex,³ Service de Microbiologie, Hôpital Robert Debré, 51092 Reims Cedex, France⁴

Received 1 December 2003/ Returned for modification 20 January 2004/ Accepted 6 April 2004

From 1996 to 2002, hepatitis C virus (HCV) typing was prospectively performed for 1,281 unselected HCV-infected and viremic patients, irrespective of their clinical status. Eighty-three patients (6.5%) were coinfected with human immunodeficiency virus (HIV) and HCV. A total of 1,195 strains were identified by a serotype screening (Murex HCV Serotyping 1-6 assay) and/or genotyping (Inno-LiPA HCV II) test. The distribution of HCV types showed an unusually high rate of type 5 (14.2%) that was stable over time and was the third most frequent type, after type 1 (59.1%) and type 3 (15.1%). HCV type 5 was more frequent in patients who were older than 50 (P = 10^–6), but its frequency did not differ significantly by gender (P = 0.21). Serotyping was performed for 1,160 strains but failed for 30.2% of them. The efficiency depended on HIV status (for HCV-HIV-coinfected patients, half of the strains were untypeable) and HCV type. Genotyping was performed for 428 samples, with an overall efficiency of 99.3%. It failed in three cases, which were subsequently identified as HCV type 2. Serotyping and genotyping results for 39 patients showed discrepancies between the two methods for 4 patients, who had HCV type 2, type 6, or mixed infections. Thus, HCV type 5 may also be encountered frequently in Western countries. Its apparent confinement to a restricted area raises the question of how it emerged and underscores the need for further studies of HCV type prevalence, routes of transmission, pathogenicity, and responses to treatment.

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* Corresponding author. Mailing address: Laboratoire de Virologie, Faculté de Médecine, 28 place Henri Dunant, 63001 Clermont-Ferrand Cedex, France. Phone: 33 4 17 81 40. Fax: 33 4 44 90 29. E-mail: chenquell{at}chu-clermontferrand.fr.

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Journal of Clinical Microbiology, July 2004, p. 3030-3035, Vol. 42, No. 7
0095-1137/04/$08.00+0     DOI: 10.1128/JCM.42.7.3030-3035.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

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