Rapid and visual detection of Lawsonia intracellularis with an improved recombinase polymerase amplification assay combined with a lateral flow dipstick View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2019-12

AUTHORS

Yanyang Wu, Kaiyue Tian, Yuhan Zhang, Huifang Guo, Ning Li, Zeng Wang, Jun Zhao

ABSTRACT

BACKGROUND: Lawsonia intracellularis (L. intracellularis) is the etiologic agent of porcine proliferative enteropathy (PPE), which is reported in many swine breeding countries all over the world, and has caused enormous economic losses in intensive pig production systems. Therefore, the aim of this study was to develop a simple and rapid method for on-site detection of Lawsonia intracellularis (L. intracellularis). As the isothermal recombinase polymerase amplification (RPA) can be performed at a constant temperature and its product is directly observed on a lateral-flow dipstick (LFD) with naked eyes without electrophoresis, the RPA-LFD assay should be useful for field diagnosis of L. intracellularis as well as its detection from clinical samples. RESULTS: The established RPA-LFD assay could be finished in 30 min at a wide temperature range of 25 to 40 °C, and the amplicons could be visualized by naked eyes. The developed RPA-LFD assay was specific to dnaA gene of L. intracellularis, and did not detect nucleic acids extracted from other common gastrointestinal pathogens. The minimum detection of this RPA-LFD method was 400 L. intracellularis per reaction, which was as sensitive as conventional PCR. Further, the RPA-LFD assay was performed with 150 clinical fecal samples and the detection results were compared with conventional PCR. Results showed that the coincidence rate of RPA-LFD and conventional PCR was 100%. CONCLUSIONS: The combined RPA with LFD assay provides a simple, rapid, specific and sensitive alternative for field diagnosis of L. intracellularis infection. More... »

PAGES

97

References to SciGraph publications

Journal

TITLE

BMC Veterinary Research

ISSUE

1

VOLUME

15

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s12917-019-1841-9

DOI

http://dx.doi.org/10.1186/s12917-019-1841-9

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1112926620

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/30898117


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43 schema:description BACKGROUND: Lawsonia intracellularis (L. intracellularis) is the etiologic agent of porcine proliferative enteropathy (PPE), which is reported in many swine breeding countries all over the world, and has caused enormous economic losses in intensive pig production systems. Therefore, the aim of this study was to develop a simple and rapid method for on-site detection of Lawsonia intracellularis (L. intracellularis). As the isothermal recombinase polymerase amplification (RPA) can be performed at a constant temperature and its product is directly observed on a lateral-flow dipstick (LFD) with naked eyes without electrophoresis, the RPA-LFD assay should be useful for field diagnosis of L. intracellularis as well as its detection from clinical samples. RESULTS: The established RPA-LFD assay could be finished in 30 min at a wide temperature range of 25 to 40 °C, and the amplicons could be visualized by naked eyes. The developed RPA-LFD assay was specific to dnaA gene of L. intracellularis, and did not detect nucleic acids extracted from other common gastrointestinal pathogens. The minimum detection of this RPA-LFD method was 400 L. intracellularis per reaction, which was as sensitive as conventional PCR. Further, the RPA-LFD assay was performed with 150 clinical fecal samples and the detection results were compared with conventional PCR. Results showed that the coincidence rate of RPA-LFD and conventional PCR was 100%. CONCLUSIONS: The combined RPA with LFD assay provides a simple, rapid, specific and sensitive alternative for field diagnosis of L. intracellularis infection.
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