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Journal of Clinical Microbiology, February 2002, p. 330-334, Vol. 40, No. 2
0095-1137/01/$04.00+0     DOI: 10.1128/JCM.40.2.330-334.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Role of Picornaviruses in Flu-Like Illnesses of Adults Enrolled in an Oseltamivir Treatment Study Who Had No Evidence of Influenza Virus Infection

Guy Boivin,1* Albert D. Osterhaus,2 Annie Gaudreau,1 Helen C. Jackson,3 Jan Groen,2 and Penelope Ward3

Infectious Disease Research Center of the Centre Hospitalier Universitaire de Québec and Department of Medical Biology, Université Laval, Québec, Canada,1 Institute of Virology, Erasmus University, Rotterdam, The Netherlands ,2 Hoffmann LaRoche, Welwyn Garden City, United Kingdom3

Received 23 February 2001/ Returned for modification 26 May 2001/ Accepted 3 November 2001

The primary objective of this study was to determine the role of picornavirus in flu-like episodes (temperature of >=38.0°C plus one respiratory and one constitutional symptom) among otherwise healthy adults enrolled in a placebo-controlled, double-blind, randomized oseltamivir treatment study. Combined nasal and pharyngeal swabs were collected at baseline for influenza cultures and picornavirus reverse transcription (RT)-PCR. In addition, acute- and convalescent-serum samples were obtained for serological studies of common respiratory pathogens. From a total of 719 subjects enrolled in the clinical trial within 36 h of the onset of symptoms, 475 (66%) had evidence of recent influenza A or B virus infections by means of culture and/or serological testing. Of the 244 remaining patients, 36 (15%) presented a seroconversion for at least one of the common respiratory viruses or atypical pathogens. An RT-PCR assay for the picornavirus 5" noncoding region (NCR) was positive in a subset of 15 (19%) of 78 patients with flu-like illnesses of undetermined etiology. Sequence analysis of the picornavirus 5" NCR amplicons revealed that 14 (93%) of them had greater homology to rhinoviruses, whereas 1 (7%) was related to enteroviruses. Interestingly, median total symptom scores and oral temperatures of picornavirus-positive patients (n = 15) and placebo-treated influenza virus-positive patients (n = 161) were similar over a 3-week period. We conclude that, among the influenza virus-negative preselected cases of this study, rhinoviruses were relatively frequent pathogens associated with important respiratory and systemic symptoms.

* Corresponding author. Mailing address: CHUQ, Pavillon CHUL, Room RC-709, 2705 blvd. Laurier, Sainte-Foy, Québec, Canada, G1V 4G2. Phone: (418) 654-2705. Fax: (418) 654-2715. E-mail: Guy.Boivin{at}crchul.ulaval.ca.

Journal of Clinical Microbiology, February 2002, p. 330-334, Vol. 40, No. 2
0095-1137/01/$04.00+0     DOI: 10.1128/JCM.40.2.330-334.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.



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