PMID- 34709596 OWN - NLM STAT- MEDLINE DCOM- 20220301 LR - 20221029 IS - 1678-4405 (Electronic) IS - 1517-8382 (Print) IS - 1517-8382 (Linking) VI - 53 IP - 1 DP - 2022 Mar TI - Development of multiplex TaqMan qPCR for simultaneous detection and differentiation of eight common swine viral and bacterial pathogens. PG - 359-368 LID - 10.1007/s42770-021-00633-w [doi] AB - It is laborious to diagnose the infections of classical swine fever virus (CSFV), porcine reproductive and respiratory syndrome virus (PRRSV), porcine circovirus type 2 (PCV2), and Suid herpesvirus 1 (SuHV-1) because of the similar clinical symptoms in piglets. Staphylococcus aureus (S. aureus), Streptococcus suis (S. suis), Salmonella choleraesuis (S. choleraesuis, serotype: 6,7:c:1,5), and Escherichia coli (E. coli) are common secondary bacterial pathogens in viral infections. Furthermore, the mixed infection of these viral and bacterial pathogens is more and more common in practical swine breeding. Therefore, a TaqMan multiplex qPCR method for simultaneous detection and differentiation of their pathogen was established in this study by designing specific primers and probes for the E2 gene of CSFV, the ORF7 gene of PRRSV, the ORF1 gene of PCV2 and the gE gene of SuHV-1, the nuc gene of S. aureus, the ef-tu gene of S. suis, the ivnA gene of S. choleraesuis, and the 23S rRNA gene of E. coli, and its specificity, sensitivity, and reproducibility were subsequently tested. The results showed that TaqMan multiplex qPCR method showed a high specificity with no cross reaction between different viruses, and a good repeatability with its coefficient of variation lower than 5%. Besides, the sensitivity of this method was also at least 10 times higher compared with conventional PCR. Overall, this study provided a reliable multiplex TaqMan qPCR method for the diagnosis and differentiation of the mentioned pathogens in pigs, laying a certain technical basis for disease prevention and control. CI - (c) 2021. Sociedade Brasileira de Microbiologia. FAU - Zhang, Qi AU - Zhang Q AD - College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. FAU - Yang, Feng AU - Yang F AD - College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. FAU - Gao, Jie AU - Gao J AD - College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. FAU - Zhang, Weimin AU - Zhang W AD - College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. 313310625@qq.com. FAU - Xu, Xingang AU - Xu X AUID- ORCID: 0000-0003-0318-9104 AD - College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China. tiger2003@nwsuaf.edu.cn. LA - eng GR - 2019NY-081/the innovation project for agro-technology of Shaanxi Province/ PT - Journal Article DEP - 20211028 PL - Brazil TA - Braz J Microbiol JT - Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology] JID - 101095924 SB - IM MH - Animals MH - *Circovirus/genetics MH - Escherichia coli/genetics MH - Multiplex Polymerase Chain Reaction/methods MH - Reproducibility of Results MH - Sensitivity and Specificity MH - Staphylococcus aureus/genetics MH - Swine MH - *Swine Diseases/diagnosis PMC - PMC8882746 OTO - NOTNLM OT - Bacterium OT - Multiplex TaqMan qPCR OT - Virus COIS- The authors declare no competing interests. EDAT- 2021/10/29 06:00 MHDA- 2022/03/03 06:00 PMCR- 2022/10/28 CRDT- 2021/10/28 12:36 PHST- 2021/01/14 00:00 [received] PHST- 2021/10/17 00:00 [accepted] PHST- 2021/10/29 06:00 [pubmed] PHST- 2022/03/03 06:00 [medline] PHST- 2021/10/28 12:36 [entrez] PHST- 2022/10/28 00:00 [pmc-release] AID - 10.1007/s42770-021-00633-w [pii] AID - 633 [pii] AID - 10.1007/s42770-021-00633-w [doi] PST - ppublish SO - Braz J Microbiol. 2022 Mar;53(1):359-368. doi: 10.1007/s42770-021-00633-w. Epub 2021 Oct 28.