Detection of agents associated with respiratory diseases of swine by real time PCR

• Autor(a) principal: FONSECA JUNIOR,Antônio Augusto
• Data de Publicação: 2015
• Outros Autores: NONAKA,Carolina Kymie Vasquez, GUEDES,Estefânia de Oliveira, LOBATO,Zélia Inês Portela, DIAS,Alessandra Silva, NASCIMENTO,Juliana Amália Fonte Boa do, KLEIN,Cátia Silene, REIS,Jenner Karlisson Pimenta dos, HEINEMANN,Marcos Bryan
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Brasileira de Saúde e Produção Animal
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1519-99402015000200005
• topic: molecular biology; preventive veterinary medicine; viruses

Porcine Respiratory Disease Complex (PRDC) is a group of diseases that cause high losses in the swine industry. Several infectious agents are related to PRDC including porcine circovirus 2 (PCV-2), pseudorabies virus (SuHV-1),Haemophilus parasuis (HP), Mycoplasma hypneumoniae (MH) and Pasteurela multocida (PM). The aim of this study was to develop real-time PCRs (qPCR) for the detection of these infectious agents. Oligonucleotides were designed for each specific infectious agent and labeled with different fluorophores to amplify specific parts of the genome. This was done in two groups of reactions—a duplex qPCR for SuHV-1 and PCV-2 and a multiplex qPCR to detect the three bacteria simultaneously. The reactions were tested in 142 pooled samples of swine lymph nodes and lungs with clinical signs of PRDC. There were 135 samples that tested positive for PCV-2, 61 for HP, 29 for PM, 30 for MH and zero for SuHV-1. We recorded 76 cases of co-infection. The qPCRs developed in this study are useful tools in the diagnosis of PRDC.