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Salmo salar Skin and Gill Microbiome during Piscirickettsia salmonis Infection
Summary
Researchers used bacterial gene sequencing to examine how the skin and gill microbiome of farmed Atlantic salmon changes during infection with the pathogen Piscirickettsia salmonis. They discovered a previously undescribed core group of co-occurring bacteria, including potential secondary pathogens found on skin ulcers and gills. The findings suggest that coinfection with these additional bacteria may worsen the severity of the primary infection.
Maintaining the high overall health of farmed animals is a central tenant of their well-being and care. Intense animal crowding in aquaculture promotes animal morbidity especially in the absence of straightforward methods for monitoring their health. Here, we used bacterial 16S ribosomal RNA gene sequencing to measure bacterial population dynamics during <i>P. salmonis</i> infection. We observed a complex bacterial community consisting of a previously undescribed core pathobiome. Notably, we detected <i>Aliivibrio wodanis</i> and <i>Tenacibaculum dicentrarchi</i> on the skin ulcers of salmon infected with <i>P. salmonis</i>, while <i>Vibrio</i> spp. were enriched on infected gills. The prevalence of these co-occurring networks indicated that coinfection with other pathogens may enhance <i>P. salmonis</i> pathogenicity.
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