identification of an antagonistic probiotic combination protecting ornate spiny lobster (panulirus ornatus) larvae against vibrio owensii infection识别一个敌对的益生菌组合保护华丽的大螯虾(panulirus ornatus)幼虫对owensii弧菌感染.pdfVIP
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identification of an antagonistic probiotic combination protecting ornate spiny lobster (panulirus ornatus) larvae against vibrio owensii infection识别一个敌对的益生菌组合保护华丽的大螯虾(panulirus ornatus)幼虫对owensii弧菌感染
Identification of an Antagonistic Probiotic Combination Protecting Ornate Spiny Lobster (Panulirus ornatus) Larvae against Vibrio owensii Infection 1,2 1 2 1 Evan F. Goulden , Michael R. Hall , Lily L. Pereg , Lone Høj * 1 Australian Institute of Marine Science, Townsville, Queensland, Australia, 2 Research Centre for Molecular Biology, School of Science and Technology, University of New England, Armidale, New South Wales, Australia Abstract Vibrio owensii DY05 is a serious pathogen causing epizootics in the larviculture of ornate spiny lobster Panulirus ornatus. In the present study a multi-tiered probiotic screening strategy was used to identify a probiotic combination capable of protecting P. ornatus larvae (phyllosomas) from experimental V. owensii DY05 infection. From a pool of more than 500 marine bacterial isolates, 91 showed definitive in vitro antagonistic activity towards the pathogen. Antagonistic candidates were shortlisted based on phylogeny, strength of antagonistic activity, and isolate origin. Miniaturized assays used a green fluorescent protein labelled transconjugant of V. owensii DY05 to assess pathogen growth and biofilm formation in the presence of shortlisted candidates. This approach enabled rapid processing and selection of candidates to be tested in a phyllosoma infection model. When used in combination, strains Vibrio sp. PP05 and Pseudoalteromonas sp. PP107 significantly and reproducibly protected P. ornatus phyllosomas during vectored challenge with V. owensii DY05, with survival not differing significantly from unchallenged controls. The present study has shown the value of multispecies probiotic treatment and demon
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