可攜帶型隔絕式恆溫聚合酶連鎖反應檢測鯨豚弓蟲感染之研發

謝孟容

doi:10.6342/NTU202104557

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可攜帶型隔絕式恆溫聚合酶連鎖反應檢測鯨豚弓蟲感染之研發

Development of a field-deployable insulated isothermal PCR (iiPCR) for the detection of Toxoplasma gondii in cetaceans

謝孟容 , Masters　　Advisor：楊瑋誠　　

英文 DOI： 10.6342/NTU202104557

可攜帶式；隔絕式恆溫聚合酶連鎖反應；鯨豚；弓蟲；污染； insulated isothermal PCR ； cetaceans ； Toxoplasma ； pollution ； field-deployed

Abstract │ Reference (135) │ Altmetrics

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Toxoplasmosis is a zoonotic disease with veterinary and public health importance worldwide. Toxoplasma gondii infection in cetaceans is an indicator of land-to-sea oocyst pollution. However, there is a critical knowledge gap within the distribution of the T. gondii infection in cetaceans. For facilitating the global surveillance of this important zoonotic pathogen, we developed a field-deployable duplex insulated isothermal PCR (iiPCR) with automated magnetic bead-based DNA extraction for the on-site detection of T. gondii in stranded cetaceans. It targets the B1 gene of T. gondii combined with β2-microglobulin (B2M) gene of cetaceans as an internal control. Compared with conventional qPCR assay, B1/B2M duplex iiPCR assay showed comparable sensitivity (21~86 bradyzoites in 25 mg of tissue) to detect spike-in standard of T. gondii DNA in cerebrum, cerebellum, skeletal muscle and myocardium tissues. Moreover, the overall agreement between the duplex iiPCR and qPCR was almost perfect agreement (92%; 95% CI: 0.78–0.90; κ=0.84) in detecting synthetic spike-in standards. The B1/B2M iiPCR assay coupled with a field-deployable system provides a prompt (~1.5 h), feasible, highly sensitive and specific on-site diagnostic tool for T. gondii in stranded cetaceans. This platform provides one approach to evaluating aquatic ecosystem health and early warnings about negative impacts on humans and marine animals.

Reference ( 135 ) 〈TOP〉

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