Recent Blog Articles
Cardiovascular safety from prostate cancer drugs remains uncertain
Rising alcohol use among older adults
Easily distracted? Try meditation
Harvard Health Ad Watch: Can a wearable device reduce stress?
Listening to your hunger cues
Does your child need to bathe every day?
Can flavonoids help fend off forgetfulness?
Can physical or cognitive activity prevent dementia?
Wondering how much your medical care will cost? New rules could help
Long-lasting healthy changes: Doable and worthwhile
What Is It?
Tetanus, also called lockjaw, is a life-threatening infection caused by Clostridium tetani bacteria. Although these bacteria are especially common in the soil and manure of farms, they can be found almost anywhere. They live in the dirt of suburban gardens and in the dirty waters of floods. They also contaminate dust in cities.
Tetanus bacteria usually enter the body through a dirty puncture wound, cut, scrape or some other break in the skin. Once inside the skin, they multiply and produce a toxin, or poison, that affects the body's nerves. This toxin causes severe muscle spasms, cramps and seizures. Spasms in the jaw muscles produce lockjaw. Spasms also occur in muscles of the throat, chest, abdomen and extremities. If you don't receive proper treatment, the toxin's effect on respiratory muscles can interfere with breathing. If this happens, you may die of suffocation.
To continue reading this article, you must log in.
Subscribe to Harvard Health Online for immediate access to health news and information from Harvard Medical School.
- Research health conditions
- Check your symptoms
- Prepare for a doctor's visit or test
- Find the best treatments and procedures for you
- Explore options for better nutrition and exercise
I'd like to receive access to Harvard Health Online for only $4.99 a month.Sign Me Up
Already a member? Login ».
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review or update on all articles. No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.