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Journal of Clinical Microbiology, October 2005, p. 5055-5057, Vol. 43, No. 10
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.10.5055-5057.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Real-Time Reverse Transcription PCR for Detection and Quantitative Analysis of Equine Influenza Virus

Michelle Quinlivan,1,2 Eugene Dempsey,3 Fergus Ryan,3 Sean Arkins,2 and Ann Cullinane1*

Virology Unit, Irish Equine Centre, Johnstown, Naas, County Kildare, Ireland,1 Department of Life Sciences, University of Limerick, Limerick, Ireland,2 Department of Biological Sciences, Dublin Institute of Technology, Dublin, Ireland3

Received 8 April 2005/ Returned for modification 27 May 2005/ Accepted 17 July 2005

Equine influenza is a cause of epizootic respiratory disease of the equine. The detection of equine influenza virus using real-time Light Cycler reverse transcription (RT)-PCR technology was evaluated over two influenza seasons with the analysis of 171 samples submitted for viral respiratory disease. Increased sensitivity was found in overall viral detection with this system compared to Directigen Flu A and virus isolation, which were 40% and 23%, respectively, that of the RT-PCR. The assay was also evaluated as a viable replacement for the more traditional methods of quantifying equine influenza virus, 50% egg infectious dose and 50% tissue culture infectious dose. There was a significant positive correlation (P < 0.05) between the quantitative RT-PCR and both of these assays.

* Corresponding author. Mailing address: Virology Unit, The Irish Equine Centre, Johnstown, Naas, Co. Kildare, Ireland. Phone: 353 45 866266. Fax: 353 45 866273. E-mail: acullinane{at}equine-centre.ie.

Journal of Clinical Microbiology, October 2005, p. 5055-5057, Vol. 43, No. 10
0095-1137/05/$08.00+0     doi:10.1128/JCM.43.10.5055-5057.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.





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