Read condition-specific symptoms and clinical context for Clostridium tetani. A soil bacterium whose toxin causes tetanus — an illness you cannot catch from another person and that vaccination prevents.
PHAC describes C. tetani as a motile, anaerobic, spore-forming bacterium whose vegetative cells are rod shaped, pleomorphic and occur in pairs or short chains, with terminal spores giving a drumstick appearance; it appears Gram-positive in young cultures and becomes Gram-negative on sporulation. It produces tetanospasmin, a potent neurotoxin. CDC states that tetanus bacteria can get into someone’s body through broken skin, usually through injuries, and that symptoms appear between 3 and 21 days, averaging 8 days, after exposure. PHAC records that transmission occurs through contamination of wounds with soil or foreign bodies carrying spores and that the disease is not directly transmitted from person to person.
PHAC records four clinical forms — localized, cephalic, generalized and neonatal — with the generalized form accounting for 80% of cases. CDC gives an incubation period of 3 to 21 days, averaging 8 days.
Possible symptoms: Spasms of the jaw muscles (lockjaw); Trouble swallowing; Involuntary muscle spasms; Muscle stiffness; Seizures; Headache; Fever; Changes in blood pressure and heart rate.
CDC states that tetanus can lead to death, with 1 in 10 cases in the United States being fatal. Tetanus is a medical emergency; wound care and vaccination decisions are clinical matters and are not given here.
WHO describes tetanus within the first 28 days of life as neonatal tetanus. PHAC lists the neonatal form among the four clinical presentations.
Possible symptoms: Muscle spasms; Loss of the ability to suck or breastfeed.
WHO reports that just over 7,700 newborns died from neonatal tetanus in 2021, an 84% reduction since 2000 when approximately 46,898 newborn deaths occurred. Prevention rests on maternal immunisation and clean birth and cord care.
Soil in a wound is not the same as tetanus.
PHAC states that transmission occurs through contamination of wounds with soil or foreign bodies carrying C. tetani spores, and that the disease is not directly transmitted from person to person. The bundled sources give no symptom list for contamination that does not produce illness, and none is invented here. Whether illness follows depends on spore entry into low-oxygen tissue, toxin production and immunity, and PHAC gives an incubation period range of 1 to 60 days. This profile assigns no human carriage state: the organism is described in soil and in the intestines of animals rather than as a normal human resident.
Wound assessment and tetanus prophylaxis decisions are clinical, depend on immunisation history and wound type, and are not given here.
Source check: 2026-09-20. Educational content; independent scientific review remains pending.