First report of stimulatory effects of CpG ODN mimicking parasitic DNA.
Parasitic CpG ODN 1013 induced defense responses as did ODN 1668 in Asia sea bass.
Parasitic CpG ODN 1013 exhibited prolonged stimulatory effect in Asia sea bass.
Parasitic CpG ODN 1013 induced defense-related genes and TLR 9 in Asia sea bass.
Survival of CpG ODN 1013-treated fish was higher than that of PBS and ODN 1668.