Porcine reproductive and respiratory syndrome virus (PRRSV) is an RNA virus that induces reproductive disorders in sows and respiratory diseases in growing pigs. Recently, the NADC34-like strain of PRRSV has become more prevalent, with outbreaks occurring across pig farms in China. However, a reliable diagnostic method for the clinical detection of this strain has been absent. This study developed a TaqMan probe-based dual real-time quantitative PCR assay targeting the M and GP5 genes to specifically identify the NADC34-like PRRSV strain. The assay exhibited high specificity, detecting exclusively the NADC34-like strain without cross-reactivity with other PRRSV strains. The detection limits for pMD-M and pMD-GP5 plasmids were 2.67 × 10² and 1.35 × 10¹ copies/μL, respectively, indicating high assay sensitivity. The assay also demonstrated excellent reproducibility, with coefficient of variation (CV) values for both recombinant plasmids below 2 %. Among 251 clinical samples, 27 tested positive for NADC34-like PRRSV. This study establishes an accurate, sensitive, and reliable TaqMan dual real-time PCR assay for detecting NADC34-like PRRSV, offering a valuable tool for clinical diagnostics and outbreak management in pig farms.

The accelerated northward shift of the overwintering boundary of Meloidogyne incognita suggests that this nematode has acquired enhanced capacity for low-t