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Journal of Clinical Microbiology, December 1999, p. 3971-3974, Vol. 37, No. 12
BioStar, Inc., Boulder, Colorado 80301
Received 24 May 1999/Returned for modification 21 July
1999/Accepted 16 September 1999
Although laboratory diagnosis of respiratory viruses has been
widely studied, there is a relative insufficiency of literature examining the impact of specimen type on the laboratory diagnosis of
influenza A and B. In a clinical study comparing the FLU OIA test with
14-day cell culture, clinical specimens from nasopharyngeal swabs,
throat swabs, nasal aspirates, and sputum were obtained from patients
experiencing influenza-like symptoms. A total of 404 clinical specimens
were collected from 184 patients. Patients were defined as influenza
positive if the viral culture of a specimen from any sample site was
positive. Patients were defined as influenza negative if the viral
cultures of specimens from all sample sites were negative. By this gold
standard, culture and FLU OIA test results for each sample type were
compared. For each of the four specimen types, the viral culture and
FLU OIA test demonstrated equal abilities to detect the presence of
influenza A or B virus or viral antigen. Sputum and nasal aspirate
samples were the most predictive of influenza virus infection. Throat
swabs were the least predictive of influenza virus infection, with both
tests failing to detect influenza virus in nearly 50% of the throat samples studied.
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Comparison of Four Clinical Specimen Types for
Detection of Influenza A and B Viruses by Optical Immunoassay
(FLU OIA Test) and Cell Culture Methods
*
Corresponding author. Mailing address: BioStar, Inc.,
6655 Lookout Rd., Boulder, CO 80301-3371. Phone: (800) 637-3717, ext. 652. Fax: (303) 530-6627. E-mail: k_webb{at}biostar.com.
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