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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/53608
Title: Shewanella khirikhana sp. nov. – a shrimp pathogen isolated from a cultivation pond exhibiting early mortality syndrome
Authors: Anuphap Prachumwat
Piyanuch Wechprasit
Jiraporn Srisala
Ruttanaporn Kriangsaksri
Timothy W. Flegel
Siripong Thitamadee
Kallaya Sritunyalucksana
Mahidol University
Thailand National Center for Genetic Engineering and Biotechnology
Keywords: Biochemistry, Genetics and Molecular Biology;Chemical Engineering;Immunology and Microbiology
Issue Date: 1-Jan-2020
Citation: Microbial Biotechnology. (2020)
Abstract: © 2020 The Authors. Microbial Biotechnology published by John Wiley & Sons Ltd and Society for Applied Microbiology. Early mortality syndrome (EMS) in cultivated shrimp is of complex aetiology. One of the causes is acute hepatopancreatic necrosis disease (AHPND) caused by unique Vibrio isolates that carry two Pirvp toxin genes, but other causes of EMS remain mostly unexplained. Here, we describe the discovery of a Shewanella isolate TH2012T from an EMS/AHPND outbreak pond and demonstrate its virulence for shrimp (the mean lethal concentration of 105 colony-forming units per millilitre by immersion challenge) accompanied by distinctive histopathology, particularly of the ventral nerve cord and lymphoid organ but also including the digestive tract. On the basis of its complete genome sequence, multilocus phylogenetic trees, digital DNA–DNA hybridization analysis and differential phenotypic characteristics, we propose that Shewanella isolate TH2012T represents a novel species, separated sufficiently from the type strains S. litorisediminis and S. amazonensis to justify naming it Shewanella khirikhana sp. nov. Analysis of the TH2012T genome revealed no homologues of the Pirvp toxin genes but revealed a number of other potential virulence factors. It constitutes the first Shewanella isolate reported to be pathogenic to shrimp.
URI: http://repository.li.mahidol.ac.th/dspace/handle/123456789/53608
metadata.dc.identifier.url: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85078739526&origin=inward
ISSN: 17517915
17517907
Appears in Collections:Scopus 2020

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