Tetrodotoxin-producing Bacillus sp. from the ribbon worm (Nemertea) Cephalothrix simula (Iwata, 1952).

Specimens of the toxic ribbon worm Cephalothrix simula from the Sea of Japan were screened for tetrodotoxin-producing bacteria. A single TTX-producing bacterial strain (No 1839) was isolated from tissues of C. simula and studied by immunohistochemical methods (including immunoelectron and immunofluorescent microscopies) with anti-TTX antibodies.