Identification of Edwardsiella ictaluri and E. tarda by species-specific polymerase chain reaction targeted to the upstream region of the fimbrial gene.
J Aquat Anim Health
; 21(2): 124-32, 2009 Jun.
Article
in En
| MEDLINE
| ID: mdl-19873834
ABSTRACT
Phylogenetic analysis of nine strains of Edwardsiella ictaluri and eight strains of E. tarda (six typical motile strains and two atypical nonmotile strains) isolated from diseased fish was performed using the upstream region of the fimbrial gene cluster. Strains of E. ictaluri and E. tarda were significantly clustered into separate groups. Moreover, atypical E. tarda strains were clustered into a different group from the other strains. Three polymerase chain reaction (PCR) primer sets for differential detection of E. ictaluri as well as typical and atypical E. tarda were developed from the respective characteristic sequences. Strains of E. ictaluri, typical E. tarda, and atypical E. tarda were specifically detected by PCR using each primer set. No amplifications were observed after the use of these three primer sets with 25 other bacterial species, including fish pathogens. In addition, the three primer sets were able to detect the DNA of each target species from fish kidney and liver artificially infected with E. ictaluri or E. tarda.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polymerase Chain Reaction
/
Fimbriae, Bacterial
/
Edwardsiella ictaluri
/
Edwardsiella tarda
/
Genes, Bacterial
Type of study:
Diagnostic_studies
/
Prognostic_studies
Language:
En
Journal:
J Aquat Anim Health
Journal subject:
MEDICINA VETERINARIA
Year:
2009
Document type:
Article
Affiliation country:
Japón