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Journal of Clinical Microbiology, February 2007, p. 421-425, Vol. 45, No. 2
0095-1137/07/$08.00+0     doi:10.1128/JCM.00894-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

Evaluation of NucliSens easyMAG for Automated Nucleic Acid Extraction from Various Clinical Specimens{triangledown}

K. Loens,* K. Bergs, D. Ursi, H. Goossens, and M. Ieven

Department of Microbiology, University of Antwerp UIA, Antwerp, Belgium

Received 28 April 2006/ Returned for modification 22 June 2006/ Accepted 5 December 2006

The objectives of this study were to evaluate the performance of the NucliSens easyMAG platform for nucleic acid extraction from different clinical specimens compared to NucliSens miniMAG platform and manual QIAGEN extraction. The NucliSens easyMAG and the NucliSens miniMAG showed equal performance on 215 throat swabs since real-time nucleic acid sequence-based amplification scored the same samples positive for Mycoplasma pneumoniae (n = 9) and Chlamydia pneumoniae (n = 5) RNAs, although internal control RNA was slightly better detected with the NucliSens easyMAG (99.3% versus 96.8%). NucliSens easyMAG extracted nucleic acids more efficiently (higher recovery and/or fewer inhibitors) compared to QIAGEN extraction by showing, on average, lower Ct values in real-time LightCycler PCR, although 4 individual specimen out of 45 were found positive only with QIAGEN. For nine M. pneumoniae-positive throat swabs, the mean difference in Ct values between NucliSens easyMAG extraction and QIAGEN extraction was –2.26 (range, –5.77 to +0.60); for the detection of five C. pneumoniae-positive throat swabs, the average difference in Ct values between the two methods was –3.38 (range, –6.62 to –2.02); and for the detection of cytomegalovirus in 24 blood samples, the mean difference in Ct values between the two methods was –0.95 (range, –5.51 to +1.68). The NucliSens easyMAG is considerably easier to perform, efficiently extracts nucleic acids from throat swabs and whole blood, is automated, and has high throughput.

* Corresponding author. Mailing address: Department of Medical Microbiology, University of Antwerp, Universiteitsplein 1 S009a, B-2610 Wilrijk, Belgium. Phone: 32-3-820-27-51. Fax: 32-3-820-26-63. E-mail: Katherine.loens{at}ua.ac.be.

{triangledown} Published ahead of print on 13 December 2006.

Journal of Clinical Microbiology, February 2007, p. 421-425, Vol. 45, No. 2
0095-1137/07/$08.00+0     doi:10.1128/JCM.00894-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



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