Tetanus is a rare but often fatal disease that affects the central nervous system by causing painful and often violent muscular contractions. It begins when tetanus bacteria (Clostridium tetani) enter the body, usually through a wound or cut that has come in contact with the bacteria's spores. Tetanus spores are found in soil, dust, and manure. Tetanus is a non-communicable disease, meaning that it cannot be passed from one person to another.
Tetanus is rare in the United States, with nearly all cases occurring in adults who were not vaccinated as children, or in those who have not had a booster vaccination in 10 years.
In the United States, there are between 50 and 100 reported cases of tetanus a year. About 30% of cases are fatal. Most people who die of tetanus infections are over 50 years old.
Tetanus causes convulsive muscle spasms and rigidity that can lead to respiratory paralysis and death. It is sometimes called "lockjaw" because one of the most common symptoms is a stiff jaw that cannot be opened. Sometimes tetanus is localized, that is, it affects only the part of the body where the infection began. However, in almost all reported cases, tetanus spreads to the entire body. The incubation period, from the time of the injury until the first symptoms appear, ranges from five days to three weeks. Symptoms usually occur within eight to 12 days. The chance of death is increased when symptoms occur early.
Causes & symptoms
Tetanus is caused by a bacteria called Clostridium tetani, whose spores (the dormant form) are found in soil, street dust, and animal feces. The bacteria enter the body through cuts and abrasions but will only multiply in an environment that is oxygen-free (anaerobic). Deep puncture wounds and wounds with a lot of dead tissue provide an oxygen-free environment for the bacteria to grow.
As C. tetani grows, it excretes a highly poisonous toxin called tetanospasmin into the bloodstream, spreading it the nervous system. The infection is usually transmitted through deep puncture wounds or through cuts or scratches that are not cleaned well. Many people associate tetanus with rusty nails and other dirty objects, but any wound can be a source. Less common ways of getting tetanus are animal scratches and bites; surgical wounds; dental work; punctures caused by glass, thorns, needles, and splinters; and therapeutic abortion. Rare cases have been reported in people with no known wound or medical condition.
Neonatal tetanus in newborns can be caused by cutting the umbilical cord with an unsterile instrument or by improper care of the umbilical stump. It is less common in developed countries.
The toxin affects the nerve endings, causing a continuous stimulation of muscles. Initial symptoms may include restlessness, irritability, a stiff neck, and difficulty swallowing. In about half of all cases, the first symptom is a stiff or "locked" jaw, which prevents patients from opening their mouths or swallowing. This is also called trismus and results in a facial expression called a sardonic smile. Trismus is often followed by stiffness of the neck and other muscles throughout the body as well as uncontrollable spasms. Sometimes these convulsions are severe enough to cause broken bones. Other symptoms include loss of appetite and drooling. People with localized tetanus experience pain and tingling only at the wound site and spasms in nearby muscles.
In the underdeveloped world, neonatal tetanus accounts for about one-half of tetanus deaths and is related to infection of the umbilical stump in a baby born of an unimmunized mother. Worldwide, 800,000 children die of tetanus each year.
Tetanus is diagnosed by the clinical symptoms and a medical history that shows no tetanus immunization. Early diagnosis and treatment is crucial for recovery.
In general, the shorter the incubation period, the more severe the disease.
As traditional medical treatment revolves around drug therapy, Traditional Chinese medicine herbal remedies are the most common alternative treatment for tetanus. Herbs that have sedative effects should be given to reduce the frequency of convulsions, along with herbs to fight the bacteria.
Tetanus and convulsions can be treated with a concoction made from the dried body of a long-noded pit viper, called this drug Qi She in Mandarin. Chan Tui, or cicada slough (the skin the cicada sheds) is also helpful. Also helpful are the dried root of the Saposhnikovia divaricata, called divaricate saposhnikovia root, and jack-in-the-pulpit tuber, if it is treated so it is not poisonous.
There are several alternative treatments aimed at prevention of the disease.
Tetanus is a life-threatening disease and patients are usually hospitalized, usually in an intensive-care ward. Treatment can take several weeks and includes antibiotics to kill the bacteria and shots of antitoxin to neutralize the toxin. It also includes anti-anxiety drugs to control muscle spasms or barbiturates for sedation. In severe cases, patients are placed on an artificial respirator. Recovery can take six weeks or more. After recovery, since the levels of circulating toxin are quite low, the patient must still be adequately immunized against this disease.
Full recovery is common in patients who can be kept alive during the most violent portion of the attacks. Yet up to 30% of tetanus victims in the United States die. Early diagnosis and treatment improves the prognosis. Neonatal tetanus has a mortality rate of more than 90%.
Castor oil is a natural remedy that can be used to clean out a wound and prevent tetanus. When a wound is sustained, a cotton ball dunked in castor oil should be placed on the wound, and then fixed on the wound with a bandage. Castor oil has tremendous drawing power and can pull out rust and other infectious agents. The dressing should be changed every two hours the first day of treatment and twice a day for the next three days.
Tetanus is easily preventable through vaccination. All children should have a series of five doses of DTaP, a combined vaccine that offers protection against diphtheria, tetanus, and pertussis, before the age of seven. This position is supported by numerous organizations, including the World Health Organization, the Centers for Disease Control and Prevention, the Advisory Committee on Immunization Practices, the Committee on Infectious Diseases of the American Academy of Pediatrics, and the American Academy of Family Physicians. Children in the United States will not be admitted to school without proof of this and other immunizations.
The DTaP (Diptheria, Tetanus, accellular Pertussis) vaccine should be given at ages two months, four months, six months, 15-18 months, and four to six years. DTaP is the preferred vaccine for children up to the age of seven in the United States; it has fewer side effects than DTP and can be used to complete a vaccination schedule begun with DTP. DTaP was first approved by the Food and Drug Administration in September 1996. In December 1996, it was approved for use in infants. Between age 11 and 13, children should have a booster, called Td, for diphtheria and tetanus.
Adults should have a Td booster every 10 years. Statistics from the Centers for Disease Control and Prevention show that fewer than half of Americans aged 60 and older have antibodies against tetanus. The Centers for Disease Control and Prevention suggests adults be revaccinated at mid-decade birthdays (for example, at 45). Adults who have never been vaccinated against tetanus should get a series of three injections of Td over six to 12 months and then follow the 10-year booster shot schedule.
Side effects of the tetanus vaccine are minor: soreness, redness, or swelling at the site of the injection that appear any time from a few hours to two days after the vaccination and disappear in a day or two. Rare but serious side effects that require immediate treatment by a doctor are serious allergic reactions or deep, aching pain and muscle wasting in the upper arms. These symptoms could start from two days to four weeks after the shot and could continue for months.
For those who are averse to immunizations, tetanus immunity can be boosted naturally by taking vitamin E , according to a study from Tufts University in Medford, Massachusetts. To get the most benefit, 200 mg should be taken daily.
Keeping wounds and scratches clean is important in preventing infection. Since this organism grows only in the absence of oxygen, the wounds must be adequately cleaned of dead tissue and foreign substances. Run cool water over the wound and wash it with a mild soap. Dry it with a clean cloth or sterile gauze. To help prevent infection, apply an antibiotic cream or ointment and cover the wound with a bandage. Try the castor oil remedy. The longer a wound takes to heal, the greater the chance of infection. Consult a doctor if the wound doesn't heal, if it is red or warm, or if it drains or swells.
If the wounded individual does not have an adequate history of immunization, a doctor may administer a specific antitoxin (human tetanus immune globulin, TIG) to produce rapid levels of circulating antibody. The antitoxin is given at the same sitting as a dose of vaccine but at a separate site.
Some individuals will report a history of significant allergy to "tetanus shots." In most cases, this occurred in the remote past and was probably due to the previous use of antitoxin devised from horse serum.
- A genus of deadly bacteria that are responsible for tetanus and other serious diseases, including botulism and gangrene from war wounds. It thrives without oxygen.
- Diphtheria and tetanus toxoids and accellular Pertussis combination vaccine.
- Diphtheria, tetanus, and whole-cell pertussis vaccine.
- Refers to a common name given to the disease taken from its most pervasive symptom.
- Tetanus and diptheria vaccine.
- A poisonous substance, often produced by bacteria, that flows through the body.
For Your Information
- Evelyn, Nancy. The Herbal Medicine Chest. Trumansburg, N.Y.: The Crossing Press, 1986.
- Magill's Medical Guide, edited by Tracy Irons-Georges. Englewood Cliffs, N.J.: Salem Press, 1998.
- "Have You Had Your Shots Yet?" Tufts University Health & Nutrition Newsletter (August 1997): 4.
- Zamalu, Evelyn. "Adults Need Tetanus Shots, Too." FDA Consumer (July/August 1996): 14-18.
- Centers for Disease Control and Prevention. "Tetanus & Diphtheria (Td) Vaccine." Healthtouch Online. http://www.healthtouch.com/bin/EContent_HT/showAllLfts.asp.
- "Shots for Safety." National Institute on Aging Age Page. www.nih.gov/nia/health/pubpub/shots.htm.
- "TCM Herbal Database." China-Med.net. http://www.china-med.net/herb_search.html.
Gale Encyclopedia of Alternative Medicine. Gale Group, 2001.