How is tetanus diagnosed?

Written by Liu Huan Huan
General Surgery
Updated on January 12, 2025
00:00
00:00

The diagnosis of tetanus requires comprehensive consideration. If the patient has a history of trauma with skin or mucosal wounds, and shows signs of muscle spasms, such as difficulty opening the mouth, stiffening of the neck, and increased reflexes, the possibility of a tetanus infection should be considered. Further, a culture of the wound can be conducted to see if Clostridium tetani can be cultured. If the culture is positive, a definitive diagnosis can be made. Additionally, tetanus needs to be differentiated from other diseases such as purulent meningitis, rabies, epilepsy, hysteria, and so on.

Other Voices

doctor image
home-news-image
Written by Li Chang Yue
General Surgery
46sec home-news-image

Does tetanus infect others?

Tetanus occurs when wounds are contaminated by Clostridium tetani, which then proliferates and grows within the human body, ultimately causing tetanus. Generally, tetanus is not transmitted from person to person; it usually occurs when bacteria invade the body through external injuries or wounds. Additionally, newborns may contract tetanus through the birth canal during delivery. Therefore, for deep or large wounds, especially in heavily contaminated conditions, it is crucial to clean and possibly stitch the wounds promptly. If necessary, tetanus immune globulin injections and vaccinations against these bacteria can be administered to thoroughly prevent the occurrence of tetanus.

doctor image
home-news-image
Written by Zhang Peng
General Surgery
58sec home-news-image

How long can a tetanus shot last?

The duration of a tetanus shot can be considered from two different immunization processes. In the case of passive immunity, it typically lasts for a shorter duration. If tetanus antitoxin is administered, it generally lasts between two to four days, while tetanus immunoglobulin can last up to three weeks. After this period, the level of antibodies gradually decreases, and the body may no longer be protected. Therefore, a single use of tetanus antitoxin or immunoglobulin does not provide lasting immunity. The second method is what we commonly refer to as getting a tetanus vaccine, which is a process of active immunity. Usually, for active immunity, the tetanus bacterium is processed and made into a weakened vaccine for injection. Antibodies can be produced after about ten days, and within two to three months, the level of antibodies in the body gradually increases and remains at a high titer, providing immunity for up to about ten years.

doctor image
home-news-image
Written by Zhang Peng
General Surgery
1min home-news-image

How many times do you need to get a tetanus shot?

The number of tetanus shots required depends on the specific condition of the wound and the patient's previous immunization history. Generally, for smaller, superficial, and cleaner wounds, which are considered to have a low risk of tetanus infection, the body can produce protective antibodies on its own. In such cases, a tetanus toxoid injection is given once a month, usually three times in total, allowing the patient's body to produce active antibodies and obtain long-term protection. If the wound is large, deep, and contaminated, with a substantial amount of foreign material or necrotic tissue, the chances of tetanus infection are very high. In such cases, passive immunization is actively conducted, usually involving tetanus antitoxin or immunoglobulin. Here, typically three doses of tetanus toxoid are administered to stimulate the body to produce active antibodies and achieve long-term protection.

doctor image
home-news-image
Written by Zhang Peng
General Surgery
48sec home-news-image

How long does a tetanus shot last?

Regarding how long a tetanus shot lasts, it depends on which type has been administered. Generally, there are two types of tetanus injections: tetanus immunoglobulin and tetanus antitoxin. Typically, doctors perform a skin test before administering the tetanus antitoxin; if the patient has a positive skin test and cannot tolerate desensitization treatment, tetanus immunoglobulin can be administered instead. These two medications have different metabolic times and their preventive effects vary. The metabolic time for tetanus antitoxin is generally one week, whereas for tetanus immunoglobulin, it can last about 28 days. Therefore, how long a tetanus shot lasts depends on the specific circumstances of the patient’s injection.

doctor image
home-news-image
Written by Li Jin Quan
General Surgery
37sec home-news-image

Is tetanus serious?

In usual circumstances, when we diagnose tetanus, it is crucial to use a large amount of tetanus antitoxin and tetanus immunoglobulin early on to neutralize the toxins in the blood and alleviate the symptoms of tetanus. If tetanus severely manifests with symptoms such as muscle spasms, muscle rigidity, difficulty in opening the mouth, stiff neck, or complications like respiratory difficulty, respiratory failure, or even cessation of breathing and heartbeat, the condition can lead to severe complications and high mortality rates. Thus, tetanus becomes very severe in its late stages.