TABLE 2.

Classification of Clostridium botulinum neurotoxin gene sequencesa

SerotypeNo. of complete sequencesNo. of partial sequencesNo. of subtypesMinimum and maximum amino acid differences within serotype (%)
A7210.1
B9343.6-7.7
C6224.0-24.2
D5223.7-23.9
E17632.6-5.1
F42410.7-31.6
G11
Total491118
  • a Subtypes were defined as differing by at least 2.6% at the amino acid level.