NDLI: A triplex real-time PCR for differential detection of classical, variant and Bartha-K61 vaccine strains of pseudorabies virus

Content Provider	Springer Nature Link
Author	Meng, Xing Yu Luo, Yuzi Liu, Yan Shao, Lina Sun, Yuan Li, Yongfeng Li, Su Ji, Shengwei Qiu, Hua Ji
Copyright Year	2016
Abstract	Pseudorabies (PR), also known as Aujeszky’s disease, is an economically important infectious disease of pigs and other animals caused by pseudorabies virus (PRV). Since late 2011, increasing numbers of PR outbreaks have been reported on many Bartha-K61-vaccinated pig farms in China, and emerging PRV variants that differ from classical PRV strains genetically and antigenically have been confirmed to be responsible for the outbreaks. Accordingly, there is a need to differentiate diverse PRV strains co-circulating in the field. Here, we developed and evaluated a triplex real-time PCR for differential detection of wild-type PRV (classical and variant strains) and gE/gI gene-deleted vaccine strains based on three differently labeled TaqMan probes. The detection limits of the assay were 0.5 TCID50 for classical strains, 0.2 TCID50 for variant strains and 0.05 TCID50 for vaccine strains. The sensitivity was also determined to be 50, 50 and 5 copies for the TJ, SC and Bartha-K61 strain, respectively. The assay did not show cross-reactivity with several common porcine viruses. Reproducibility tests showed that the inter- and intra-assay coefficients of variation were less than 3 %. When testing a total of 234 clinical swine samples, the agreement between the triplex real-time PCR and virus isolation was 100 % (234/234) for classical strains, 99.5 % (233/234) for variant strains, and 100 % (234/234) for the Bartha-K61 vaccine strain. The results demonstrate that this method is sensitive and specific and will be useful for rapid detection and differentiation of diverse PRV strains.
Starting Page	2425
Ending Page	2430
Page Count	6
File Format	PDF
ISSN	03048608
Journal	Archives of Virology
Volume Number	161
Issue Number	9
e-ISSN	14328798
Language	English
Publisher	Springer Vienna
Publisher Date	2016-06-17
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Virology Medical Microbiology Infectious Diseases
Content Type	Text
Resource Type	Article
Subject	Virology Medicine

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