Ulcerated Yellow Spot Syndrome & Yellow Band Disease: Implications Of Aquaculture Related Pathogens Associated With Tissue Lesions | 18434
Journal of Marine Science: Research & Development
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Here we introduce a new marine syndrome called Ulcerated Yellow-Spot (UYS), affecting the soft coral
. In order to begin identifying bacteria associated with tissue lesions, tissue and mucus samples were taken
during a 2009 Indo-Pacific research expedition near the Wakatobi Island chain, Indonesia. Polymerase chain reaction (PCR)
targeting the 16S rDNA gene indicates associations with the known fish disease-causing bacteria
as well as multiple
species. Results indicate a shift toward decreasing diversity in lesioned samples.
, formerly known as
, is known as the causative agent of fish pasteurellosis and in this study, was
isolated solely in lesioned tissues. Globally, fish pasteurellosisis one of the most damaging fish diseases in marine aquaculture.
, a putative pathogen associated with Yellow Band Disease (YBD) in scleractinian coral, was also isolated
from lesioned tissues and consistent with Caribbean and Pacific YBD. Lesions appear to be inflicting damage on symbiotic
.), measured by decreases in mitotic index (MI %), cell density and photosynthetic efficiency
(dF/Fm'). Mitotic index of zooxanthellae within infected tissue samples revealed an ~80% decrease, while zooxanthellae
densities depict an ~40% decrease in lesioned tissue samples compared to healthy coral. These results provide evidence for the
presence of known aquaculture pathogens in lesioned soft coral and may be a concern with respect to cross species epizootics
in the tropics.
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