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Journal of Clinical Microbiology, July 2005, p. 3457-3459, Vol. 43, No. 7
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.7.3457-3459.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Evaluation of Real-Time Reverse Transcriptase PCR and Real-Time Loop-Mediated Amplification Assays for Severe Acute Respiratory Syndrome Coronavirus Detection

Leo L. M. Poon,1,2* Bonnie W. Y. Wong,1 Kwok H. Chan,1,2 Stella S. F. Ng,1 Kwok Y. Yuen,1,2 Yi Guan,1,2 and J. S. Malik Peiris1,2

Department of Microbiology, Queen Mary Hospital,1 Division of Infectious Diseases, Centre of Infection, University of Hong Kong, Hong Kong, Special Administrative Region, People's Republic of China2

Received 11 January 2005/ Returned for modification 26 February 2005/ Accepted 22 March 2005

We compared the performance of a recently established real-time loop-mediated amplification (LAMP) assay with the one from a highly sensitive quantitative PCR assay. None of these assays produced false-positive results in this study. For samples isolated from patients within the first 3 days of disease onset, the detection rate of the quantitative PCR assay was higher (14 of 15 were positive) than the LAMP assay (9 of 15 were positive). By contrast, the detection rates of these assays toward specimens sampled from patients with more than 3 days of illness were similar (32 of 44 for PCR and 33 of 44 for LAMP were positive). The simpler operation of LAMP might be a possible solution for on-site diagnosis.

* Corresponding author. Mailing address: Department of Microbiology, University of Hong Kong, Queen Mary Hospital, Pokfulam, Hong Kong SAR. Phone: (852) 2855 4384. Fax: (852) 2855 1241. E-mail: llmpoon{at}hkucc.hku.hk.

Journal of Clinical Microbiology, July 2005, p. 3457-3459, Vol. 43, No. 7
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.7.3457-3459.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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