Phenotypic characterization, virulence, and immunogenicity of Pseudomonas plecoglossicida rpoE knock-down strain.
Fish Shellfish Immunol
; 87: 772-777, 2019 Apr.
Article
em En
| MEDLINE
| ID: mdl-30776544
ABSTRACT
Pseudomonas plecoglossicida, a temperature dependent bacterial pathogen in fish, expresses rpoE gene that is sensitive to temperature and probably critical for pathogen virulence and disease development. In this study, the rpoE silence strain rpoE-RNAi-1 was constructed by gene knock-down. The rpoE-RNAi-1 displayed significant changes in biofilm formation, swarming motility, adhesion and virulence. Meanwhile, vaccination of grouper with rpoE-RNAi-1 led to a relative percent survival (RPS) value of 85% after challenged with the wild-type P. plecoglossicida. qRT-PCR assays showed that vaccination with rpoE-RNAi-1 enhanced the expression of immune-related genes, including MHC-I, MHC-II, IgM, and IL-1ß, indicating that it was able to induce humoral and cell-mediated immune response in grouper. These results validated the possibility of rpoE as a potential target for constructing P. plecoglossicida live attenuated vaccine.
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Assunto principal:
Pseudomonas
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Bass
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Vacinas Bacterianas
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Imunogenicidade da Vacina
Limite:
Animals
Idioma:
En
Revista:
Fish Shellfish Immunol
Ano de publicação:
2019
Tipo de documento:
Article