Key result
A TaqMan real-time PCR assay designed for PCV2 genotype 2d detected down to 310 copies of the viral genome and was more sensitive than conventional PCR.
Why the study?
Because symptoms of PCV2 infection overlap with other porcine infectious illnesses, clinical diagnosis is challenging, requiring sensitive molecular detection methods.
Does a newly designed TaqMan real-time PCR assay improve the detection of PCV2 genotype 2d compared to conventional PCR?
Does a newly designed TaqMan real-time PCR assay improve the detection of PCV2 genotype 2d compared to conventional PCR?
A newly developed TaqMan real-time PCR assay specific for PCV2 genotype 2d is more sensitive than conventional PCR, with a detection limit of 310 viral genome copies.
May improve PCV2 detection specificity in pigs; leaves open prospective validation before clinical use.
Pigs are under constant threat from many infectious diseases and post-weaning multisystemic syndrome (PWMS) is one among them. The syndrome is caused by the Porcine Circovirus 2 (PCV2) which belongs to the Circoviridae family. Because the symptoms of PCV2 infection and other porcine infectious illnesses, especially porcine reproductive and respiratory syndrome (PRRS) overlap, diagnosis of the former based on clinical indicators could be challenging. A study was conducted to develop a TaqMan real-time polymerase chain reaction (PCR) for the detection of PCV2 genotypes prevalent in Kerala. Primers and TaqMan probes based on the ORF2 nucleotide sequences of the PCV2 prevalent in Kerala were designed. On testing, it was observed that the TaqMan real-time PCR was not able to detect the PCV2genotypes prevalent in Kerala. However, the designed primers (but not the probe) were able to detect these genotypes. Hence, another TaqMan assay specific for detection of 2d was designed as that genotype was predominant in Kerala. The detection limit estimated using the cloned template was found to be 310 copies of the viral genome. The assay was more sensitive in detecting the virus compared to conventional PCR.
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Shashank et al. (2023) studied Porcine Circovirus 2 (PCV2) infection. TaqMan real-time polymerase chain reaction (PCR) vs. Conventional PCR was evaluated on Detection limit of the viral genome. A TaqMan real-time PCR assay designed for PCV2 genotype 2d detected down to 310 copies of the viral genome and was more sensitive than conventional PCR.
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