Evaluation of BiosewoomTM Real-Q Cytomegalovirus Quantification kit for Cytomegalovirus Viral Load Measure.
10.3343/kjlm.2007.27.4.298
- Author:
Woon Bo HEO
1
;
Dong Il WON
;
Yoo Li KIM
;
Myeong Hee KIM
;
Heung Bum OH
;
Jang Soo SUH
Author Information
1. Department of Laboratory Medicine, Kyung Pook National University Hospital, Daegu, Korea. suhjs@knu.ac.kr
- Publication Type:Original Article ; Comparative Study ; English Abstract ; Evaluation Studies
- Keywords:
RQ-PCR;
pp65 antigenemia test;
CMV DNA
- MeSH:
Adolescent;
Adult;
Aged;
Child;
Child, Preschool;
Cytomegalovirus/genetics/*isolation & purification;
Cytomegalovirus Infections/*diagnosis/virology;
DNA, Viral/blood;
Female;
Humans;
Infant;
Infant, Newborn;
Male;
Middle Aged;
Phosphoproteins/analysis;
Polymerase Chain Reaction/*methods;
Reagent Kits, Diagnostic;
Reproducibility of Results;
Sensitivity and Specificity;
Viral Load/*methods;
Viral Matrix Proteins/analysis/blood
- From:The Korean Journal of Laboratory Medicine
2007;27(4):298-304
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
BACKGROUND: Rapid and accurate laboratory tests are essential to detect cytomegalovirus (CMV) infections in solid organs and haematopoietic stem cell transplant recipients. We assessed the realtime quantitative PCR (RQ-PCR) technology for its usefulness in detecting CMV DNA. METHODS: We evaluated the analytical performance of CMV RQ-PCR using Real-Q Cytomegalovirus Quantification kit (BioSewoom Inc., Korea). To evaluate its clinical utility, we also compared it to pp65 antigenemia test, an immunostaining method, on 343 samples of total 84 patients, including 63 transplant recipients. RESULTS: The detection limit of RQ-PCR was 63 copies/mL and none of hepatitis B virus, hepatitis C virus, or human immunodeficiency virus showed a cross-reactivity with CMV. Total coefficient of variation (CV) was 10.4-19.5%. It detected CMV DNA in a linear range from 1 x 10(2) to 5 x 10(11) copies/mL (P<10(-13), R2=0.9994). The qualitative positive rates of pp65 antigenemia test and RQ-PCR were 4.7%, 16.3%, respectively and concordance rate between the two tests was 84.8% (K=0.221, P<10(-6)). In comparison of quantitative results, the correlation between two tests was significant (r=0.45, P<10(-17)). In comparison among three groups by pp65 antigen level, CMV DNA level obtained with RQ-PCR increased significantly (P<10(-3) and P<10(-7), respectively). CONCLUSIONS: The RQ-PCR is easier to perform than the immunostaining method, has good analytical performance and reflects the blood level of viral DNA well. It may be a new method substituting the pp65 antigenemia test. Further studies determining RQ-PCR value starting pre-emptive therapy will be required.
