Emergence of novel Streptococcus iniae exopolysaccharide-producing strains following vaccination with nonproducing strains

Marina Eyngor, Yoram Tekoah, Roni Shapira, Avshalom Hurvitz, Amir Zlotkin, Avishay Lublin, Avi Eldar

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

Streptococcus iniae is a major pathogen of fish, producing fatal disease among fish species living in very diverse environments. Recently, reoccurrences of disease outbreaks were recorded in rainbow trout (Oncorhynchus mykiss, Walbaum) farms where the entire fish population was routinely vaccinated. New strains are distinguished from previous strains by their ability to produce large amounts of extracellular polysaccharide that is released into the medium. Present findings indicate that the extracellular polysaccharide is a major antigenic factor, suggesting an evolutionary selection of strains capable of extracellular polysaccharide production.

Original languageEnglish
Pages (from-to)6892-6897
Number of pages6
JournalApplied and Environmental Microbiology
Volume74
Issue number22
DOIs
StatePublished - 1 Nov 2008

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