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Closed Access item Characterization and infectivity of four bacterial strains Isolated from brown ring disease-affected clams
Borrego, J. J.
|Keywords:||Vibrio tapetis;, Pathogenicity, Virulence, Bivalve mollusc, Clams, Brown Ring Disease, Hemolymph|
|Citation:||Journal of Invertebrate Pathology 71(1): 34-41 (1998)|
|Abstract:||Four bacterial strains isolated from carpet-shell
clams (Ruditapes decussatus) and manila clams (R.
philippinarum) exhibiting Brown Ring Disease (BRD)
symptoms in Galicia (Northwest of Spain) were characterized
using biochemical and serological techniques.
Moreover their pathogenicity for clams and resistance
against clam hemolymph were determined. All of the
Vibrio isolates exhibited biochemical characteristics
typical of the genus. Strains GR1703RP and GR6301RP,
isolated from R. philippinarum showing signs of BRD,
shared phenotypical and antigenic characteristics and
bacterial extracellular products enzymatic activities
with the Vibrio tapetis. Strains GR0705RD and
GR0202RD, isolated from R. decussatus showing BRD
signs, although biochemically similar to V. tapetis, did
not show positive agglutination with V. tapetis antiserum.
The virulence of the bacteria varied depending
on the bacterial strain and clam species assayed. Mortalities
were recorded for a 30-day period, reaching
values ranging from 6 to 80%. Strain GR0202RD was
the most virulent for R. philippinarum with a cumulative
mortality rate of 45%, while the strain GR0705RD
induced the highest prevalence of BRD signs, affecting
75% of the survivors. In the case of R. decussatus, the
four bacterial strains produced a cumulative mortality
rate higher than 45%. In general, bacterial strains,
showed resistance to clams hemolymph.|
|Description:||8 páginas, 2 figuras, 3 tablas|
|Publisher version (URL):||http://dx.doi.org/10.1006/jipa.1997.4704|
|E-ISSNmetadata.dc.identifier.doi = DOI:||1096-0805|
|Appears in Collections:||(IIM) Artículos|
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