AI Article Synopsis
- A culture that accumulates poly-beta-hydroxybutyrate (PHB) was developed using activated sludge, which boosted the survival rates of Artemia nauplii infected with Vibrio campbellii.
- Isolate PHB2, closely related to Brachymonas denitrificans, effectively accumulated PHB, comprising up to 32% of its cell weight.
- The PHB produced by PHB2 provided complete protection to Artemia from the pathogen, suggesting its potential use in aquaculture for infection control.
Article Abstract
A poly-beta-hydroxybutyrate (PHB)-accumulating enrichment culture was obtained using activated sludge from a polyphosphate-accumulating reactor as inoculum. PHB accumulated by the enrichment culture significantly enhanced the survival of Artemia nauplii, infected with the virulent pathogen Vibrio campbellii LMG 21363. A strain was isolated from the enrichment culture, based on its ability to accumulate PHB, and 16S rRNA gene sequencing of the isolate revealed 99% sequence similarity to Brachymonas denitrificans AS-P1. The isolate, named PHB2, showed good PHB-accumulating activity (up to 32% of the cell dry weight). PHB accumulated by isolate PHB2 was able to protect Artemia completely from the V. campbellii strain. Our data indicate that PHB-accumulating bacteria, such as B. denitrificans PHB2, could be used as an an effective and economically interesting alternative strategy to control infections in aquaculture.
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| http://dx.doi.org/10.1111/j.1574-6941.2007.00305.x | DOI Listing |
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