Identification of Four Distinct Phylogenetic Groups in With Fish Host Associations.

Columnaris disease, caused by the Gram-negative bacterium , is one of the most prevalent fish diseases worldwide. An exceptionally high level of genetic diversity among isolates of has long been recognized, whereby six established genomovars have been described to date. However, little has been done to quantify or characterize this diversity further in a systematic fashion.

Differential transcriptomic response in the spleen and head kidney following vaccination and infection of Asian seabass with Streptococcus iniae.

Vaccination is an important strategy in the protection of aquaculture species from major diseases. However, we still do not have a good understanding of the mechanisms underlying vaccine-induced disease resistance. This is further complicated by the presence of several lymphoid organs that play different roles when mounting an immune response.