Ten strains of Clostridium botulinum type E have been studied at 12 temperatures between 2�5 and 45�0. Growth proceeded consistently from spore inocula at temperatures between 5 and 37�5�0, but some strains developed slightly at ~empera� tures up to 45�0. Maximum rates of growth occurred at 35�0. The upper and lower temperature limits were several degrees lower than for type A and B strains.