A reverse transcription loop-mediated isothermal amplification (RT-LAMP) assay was developed and
optimized to detect bovine viral diarrhea viral (BVDV) RNA. The RT-LAMP assay is highly sensitive and
able to detect 4.67 × 100 copies of BVDV RNA. Additionally, the RT-LAMP method is capable of detecting
both genotypes of BVDV. No cross-reaction with other bovine viruses was observed. The ability of RTLAMP
to detect BVDV RNA from bovine fecal swabs was also evaluated. Of the 88 fecal swabs, 38 were
found to be positive by RT-LAMP assay, whereas 39 were positive by real-time RT-PCR. Taken together,
the BVDV specific RT-LAMP method is highly specific and sensitive and can be used as a rapid and direct
diagnostic assay for testing clinical samples.