4.6 Article

De novo whole transcriptome analysis of Aeromonas hydrophila isolated from the gut of an infected Labeo rohita

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FRONTIERS IN MICROBIOLOGY
卷 14, 期 -, 页码 -

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FRONTIERS MEDIA SA
DOI: 10.3389/fmicb.2023.1247652

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Aeromonas hydrophila; transcriptome analysis; virulence genes; Labeo rohita; microbial management

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This study provides a comprehensive analysis of the pathogenic mechanism of Aeromonas hydrophila during infection. It reveals special characteristics in gene expression, gene ontology terms, and pathogenesis-associated genes. Additionally, it identifies outer membrane protein genes, cytotoxin, amylase, and lipase genes. This research provides important insights into the fitness of A. hydrophila.
Aeromonas hydrophila is a major generalist bacterial pathogen causing severe infections and mortalities in aquatic animals. Its genome, which was the first to be sequenced from the Aeromonas genus, may serve as a model for studying pathogenic mechanisms. To explore the pathogen-host fitness mechanism of bacterium, a comprehensive comparative transcriptome ecotype analysis of A. hydrophila isolated from the gut of Labeo rohita during infection was performed. Special characteristics in gene expression, gene ontology terms and expression of pathogenesis-associated genes, including genes encoding secreted proteins, candidate effectors, hydrolases, and proteins involved in secondary metabolite production were revealed. Among the database, 6,533 were gene ontology (GO) annotated, while 1,480 were not allocated in any GO terms. Investigation on GO illustrated that the articulated genes were improved with molecular function, cellular components, and biological processes. Further bioinformatics analysis identified the outer membrane protein genes (ompA, ompts, ompw, omp38, and omp48), cytotoxin, amylase, and lipase genes. Overall, this work allowed to designate, for the first time, a global view on the pathogenicity of Aeromonas hydrophila during infection. Furthermore, the study provides information on the fitness of A. hydrophila, a severe pathogen with a wide host range.

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