How long is a tetanus shot effective?

Written by Li Jin Quan

General Surgery

Updated on April 02, 2025

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Tetanus generally refers to a specific type of infection caused by the entry of tetanus bacillus into the body through broken skin or mucous membranes, where it produces a large amount of toxin. Typically, the incubation period for tetanus is 6 to 7 days, but it can be as short as within 24 hours or as long as several months or even years. Therefore, if there is a wound, the first thing to do is to clean the wound with hydrogen peroxide or saline. Then, it is best to go to the hospital to get a tetanus vaccine within 24 hours. If the tetanus vaccine is not administered within 24 hours, it can still be effective if given within a week.

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Initial symptoms of tetanus

The bacterium that causes tetanus is Clostridium tetani, which is an anaerobic bacterium. If the wound is deep and enclosed in an environment lacking oxygen, it creates a suitable environment for the growth and reproduction of Clostridium tetani. Its incubation period is generally around one week. Early symptoms may include general fatigue, localized muscle tension, and uncontrollable spasms. The first muscles affected are usually the facial chewing muscles, and it can then progress to intense, spasmodic contractions of muscles throughout the body, and even cause fractures. Mild stimuli such as light, sound, or drinking water can trigger and worsen these symptoms, somewhat similar to rabies. However, a characteristic feature of tetanus is that the patient remains mentally clear. Most patients may die from respiratory spasms leading to asphyxiation, heart failure, or lung infections.

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Written by He Zong Quan

General Surgery

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Can a festering wound lead to tetanus?

Wound suppuration and contracting tetanus are two different concepts. Wound suppuration primarily occurs when there is an infection at the wound site, which spreads due to lack of significant control over the infection focus. We need to actively locate the infection source, perform thorough surgical debridement and drainage, use sensitive antibiotics as needed globally, and change dressings in a timely manner to manage the infection. Tetanus, on the other hand, is typically considered when the wound is too deep and visibly contaminated, often by rusty, sharp objects causing the infection. In such cases, thorough surgical cleansing of the wound is essential to prevent surface contamination, along with the systemic use of tetanus antitoxin to reduce or prevent a tetanus infection.

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Can tetanus be cured?

In clinical practice, the vast majority of tetanus patients can be cured, provided there are no severe complications. Typically, tetanus is caused by the toxin produced by Clostridium tetani within the human body, leading to a specific type of infection. Clinically, it usually manifests as muscle tension and rigidity, and some patients might experience lockjaw, difficulty opening the mouth, a sardonic smile, and even stiff neck and opisthotonos. Severe cases can lead to difficulty breathing, respiratory arrest, or even cardiac arrest. Tetanus patients should go to the hospital for systematic, formal treatment and care. The vast majority of tetanus patients can be cured.

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Emergency Department

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Will tetanus cause muscle soreness?

Tetanus can cause muscle pain. The main symptoms of a tetanus attack include sudden onset, impaired consciousness, frothing at the mouth, limb convulsions, body stiffness, presenting in an opisthotonos posture, and concurrent incontinence of urine and feces, with the duration varying according to the condition. Because convulsions cause the muscles to be in a state of rigidity, this leads to muscle ischemia and hypoxia, thereby increasing lactic acid and causing this state of muscle pain. Therefore, during a tetanus attack, measures should be taken to control these convulsions. At the same time, use chopsticks to prop against the teeth to prevent biting the tongue and other such incidents. If the condition is severe, immediately call emergency services (120) to get to a hospital for urgent treatment.

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What department is the tetanus shot in?

Tetanus bacillus is actually a relatively common bacterium, usually caused by traumatic injuries, and is commonly encountered in daily life. Tetanus is an acute disease caused by the tetanus bacillus, and this disease must be managed through preventive measures. When injuries or wounds occur, it is very important to get a tetanus shot, which can usually be administered at a surgical department, allowing for immediate care in such emergencies. This disease is generally quite dangerous, so administering the tetanus vaccine within 24 hours is considered safer. Of course, depending on the specific timing, one could also visit the emergency department to get a tetanus shot urgently, which can also be effective in treatment.