title: Fluorogenic RT-PCR assay (TaqMan) for detection and classification of bovine viral diarrhea virus.
abstract: A single tube fluorogenic RT-PCR-based 'TaqMan' assay was developed for detection and classification of bovine viral diarrhea virus (BVDV). TaqMan-PCR was optimized to quantify BVD virus using the ABI PRISM 7700 sequence detection system and dual-labeled fluorogenic probes. Two different gene specific labeled fluorogenic probes for the 5' untranslated region (5' UTR) were used to differentiate between BVD types I and II. Sensitivity of the single tube TaqMan assay was compared with two-tube TaqMan assay and standard RT-PCR using 10-fold dilutions of RNA. Single tube TaqMan assay was 10-100-fold more sensitive than the two-tube TaqMan assay and the standardized single tube RT-PCR. Specificity of the assay was evaluated by testing different BVD virus strains and other bovine viruses. A total of 106 BVD positive and negative pooled or single serum samples, field isolates and reference strains were tested. Quantitation of cRNA from types I and II BVD virus was accomplished by a standard curve plotting cycle threshold values (C(T)) versus copy number. Single tube TaqMan-PCR assay was sensitive, specific and rapid for detection, quantitation and classification of BVD virus.
authors.affiliation: Department of Veterinary Science, Animal Diagnostic Laboratory, Pennsylvania State University, University Park, PA 16802, USA.
authors.forename: B
authors.initials: B
authors.lastname: Bhudevi
authors.forename: D
authors.initials: D
authors.lastname: Weinstock
mesh_terms: D000818:Animals; D001912:Bovine Virus Diarrhea-Mucosal Disease / Q000175:diagnosis*; D002417:Cattle; D017931:DNA Primers; D015342:DNA Probes; D001908:Diarrhea Viruses, Bovine Viral / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D012367:RNA, Viral / Q000097:blood*; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000662:veterinary*; D012680:Sensitivity and Specificity; D013997:Time Factors; D014766:Viremia / Q000662:veterinary
chemical_list: D017931:DNA Primers; D015342:DNA Probes; D012367:RNA, Viral