สืบค้นงานวิจัย
Duplex PCR assay and in situ hybridization for detection of Francisella spp. and Francisella noatunensis subsp. orientalis in red tilapia
Dong H.T. - ไม่ระบุหน่วยงาน
ชื่อเรื่อง (EN): Duplex PCR assay and in situ hybridization for detection of Francisella spp. and Francisella noatunensis subsp. orientalis in red tilapia
ผู้แต่ง / หัวหน้าโครงการ (EN): Dong H.T.
บทคัดย่อ (EN): Conventional isolation and identification based on phenotypic characteristics is challenging with the highly fastidious, intracellular bacterium Francisella noatunensis subsp. orientalis (Fno). Here, we developed a duplex PCR method for simultaneous detection of the Francisella genus and Fno in one PCR reaction and an in situ hybridization method for paraffin section based diagnosis of Fno. The PCR results showed genus- and species-specific bands (1140 and 203 bp) from Fno but only one genus-specific band (1140 bp) from F. noatunensis subsp. Noatunensis. Sensitivity of the duplex PCR assay revealed a detection limit of 20 to 200 fg genomic DNA (∼10 to 100 genome equivalents) depending on DNA template extraction methods. The newly developed duplex PCR assay could be used to detect Fno from clinically sick fish exhibiting signs of visceral granulomas and would also be able to detect Fno infection in naturally diseased fish without symptoms of francisellosis, indicating potential application for diagnosis of field samples. The in situ hybridization assay using Fno species-specific probe revealed positive signals in multiple organs including the spleen, liver, kidney, gills and intestine of infected fish. © Inter-Research 2016.
บทคัดย่อ: ไม่พบข้อมูลจากหน่วยงานต้นทาง
ภาษา (EN): en
เอกสารแนบ (EN): https://www.scopus.com/inward/record.uri?eid=2-s2.0-84974801239&doi=10.3354%2fdao03021&partnerID=40&md5=b46e7804f6c8db959aba7199e608cd1f
เผยแพร่โดย (EN): มหาวิทยาลัยมหิดล
คำสำคัญ (EN): Tilapia
เจ้าของลิขสิทธิ์ (EN): มหาวิทยาลัยมหิดล
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Duplex PCR assay and in situ hybridization for detection of Francisella spp. and Francisella noatunensis subsp. orientalis in red tilapia
Dong H.T.
มหาวิทยาลัยมหิดล
ไม่ระบุวันที่เผยแพร่
Francisella noatunensis subsp. orientalis, an emerging bacterial pathogen affecting cultured red tilapia (Oreochromis sp.) in Thailand Francisella noatunensis subsp. orientalis infects striped catfish (Pangasianodon hypophthalmus) and common carp (Cyprinus carpio) but does not kill the hosts Simultaneous detection of feces-specific bacteriophages of bacteroides fragilis with a duplex PCR assay Streptococcus agalactiae infection kills red tilapia with chronic Francisella noatunensis infection more rapidly than the fish without the infection Emergence of tilapia lake virus in Thailand and an alternative semi-nested RT-PCR for detection Triploidy induction by electric shock in red hybrid tilapia Virulence assay of rhizoid and non-rhizoid morphotypes of Flavobacterium columnare in red tilapia, Oreochromis sp., fry Molecular detection of Rickettsia, Anaplasma, Coxiella and Francisella bacteria in ticks collected from Artiodactyla in Thailand Evidence of vertical transmission and tissue tropism of Streptococcosis from naturally infected red tilapia (Oreochromis spp.) Hahella chejuensis is the etiological agent of a novel red egg disease in tilapia (Oreochromis spp.) hatcheries in Thailand
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