Document Type : Original Article
Authors
Department of Veterinary Medicine, College of Animal and Veterinary Sciences, Southwest Minzu University, Chengdu, China
Abstract
Mycoplasma synoviae, which causes the disease known as chicken synovitis, causes serious immunosuppression. We developed a rapid insulated isothermal polymerase chain reaction (iiPCR) assay for on-site detection of M. synoviae using a primer and probe set targeting the variable lipoprotein and haemagglutinin (vlhA) gene. In addition, the specificity, sensitivity, repeatability, and clinical detection of this method were evaluated. Our iiPCR assay detected M. synoviae clinical isolates and samples successfully and produced negative results on Mycoplasma galliscepticum, avian viral arthritis, Escherichia coli, Salmonella, Staphylococcus aureus and Corynebacterium, indicating that the PCR reactions were specific. Additionally, our iiPCR assay detected the prepared positive standard plasmid diluted 10 times (1.00 × 10-1 - 1.00 × 10-10) as a template. The undiluted positive plasmid was positive and double distilled water was negative indicating that the PCR reactions were sensitive, respectively. Finally, the vlhA positive standard plasmid with dilution multiple of 1.00 × 10-4 - 1.00 × 10-6 was repeatedly detected three times to evaluate the repeatability of the iiPCR method established in this experiment showing that the iiPCR of M. synoviae is repeatable. The established iiPCR was also used to detect 50 chicken joint enlargement samples. The thermostatic detection PCR established in this experiment was comparable to a reference real-time PCR (qPCR).
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