Genetic and phenotypic studies on the strains biochemically identified as , which had a G+C content ranging from 52 to 54 mol% were conducted. The moles percent G+C of the type strain of is 46. Surprisingly, DNA homology experiments revealed that all these strains are genetically related to (which was reported to produce tetrodotoxin), not to the type strain of . In this study, we reidentified clinical strains of which have a high range of moles percent G+C, as does . We also characterized the reidentified strains and found that the original description of (U. Simidu, K. Kita-Tsukamoto, T. Yasumoto, and M. Yotsu, Int. J. Syst. Bacteriol. 40:331-336, 1990) is insufficient to identify this strain. An emended description of is given.


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