All of the following statements regarding Clostridium tetani are true, except
Spores are resistant to heat
Primary immunization consists of three doses
Incubation period is 6-10 days
Person to person transmission does not occur
The resistance of tetanus spores to heat appears to be subject to strain differences. Most are killed by boiling for 10-15 mins but some resist boiling for up to 3 hrs. Autoclaving at 121degC for 20 mins ensures complete removal of spores. Reference: Textbook of Microbiology; Anathanarayan and paniker's; 10th edition; Page no: 265
Bacteriology