Can you get tuberculosis on your own?

Written by Wang Xiang Yu
Pulmonology
Updated on September 07, 2024
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This question can be interpreted in two ways. First, whether every individual could potentially contract tuberculosis (TB) – to that, the answer is yes. Tuberculosis is a contagious disease, and we are all susceptible to the TB bacterium. Therefore, there is a chance, in our lifetimes, to be infected by the TB bacterium and consequently develop TB. The second interpretation revolves around whether a person could suddenly develop TB without specific reasons. Generally, this does not happen. In other words, a typical person would not contract TB unless they have been exposed to the TB bacterium. This means one does not contract TB arbitrarily; it occurs only after coming into contact with TB patients or the TB bacterium, leading to an infection in the lungs and resulting in TB.

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Written by Wang Chun Mei
Pulmonology
1min 3sec home-news-image

Does tuberculosis cause fever in its initial stage?

Tuberculosis is caused by an infection of the lungs by the bacterium Mycobacterium tuberculosis, and it is a very common infectious respiratory disease clinically. Typically, the early stage of tuberculosis is accompanied by mild fever to varying degrees, usually occurring in the afternoon, along with coughing, expectoration of blood, chest tightness, shortness of breath, and even chest pain, weight loss, fatigue, and night sweats as accompanying clinical symptoms. In the early stages, the diagnosis of tuberculosis in patients is generally made through these specific clinical symptoms, along with some sputum culture and chest X-ray examinations. Usually, most patients with early-stage tuberculosis will experience symptoms of low-grade fever, but these patients have a characteristic of fever that occurs in the afternoon and does not require antipyretics as it can return to normal by itself in the evening.

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Written by Ye Xi Yong
Infectious Diseases
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Is tuberculosis contagious?

Firstly, pulmonary tuberculosis is contagious, but it also depends on the type. Generally, pulmonary tuberculosis is most contagious during its active phase, but some patients with fibrosis and in a stable phase are not contagious. The transmission of pulmonary tuberculosis is mainly through droplets, spread by talking, sneezing, or spitting from a tuberculosis patient to a healthy person. However, this droplet transmission has a distance requirement. We believe that a distance of more than 1 meter is relatively safe, and 2 meters is absolutely safe. To prevent the transmission of tuberculosis, it is essential to maintain a distance from tuberculosis patients, wear masks, and ensure frequent ventilation by opening windows.

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Written by Yuan Lin Yan
Infectious Disease
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Is tuberculosis contagious?

Not all cases of tuberculosis are infectious. Some tuberculosis cases are infectious in the early stages but become non-infectious after proper treatment. Patients with open tuberculosis are highly contagious because their sputum contains tuberculosis bacilli. These bacilli can be released into the air through coughing, sneezing, laughing, or loud speaking, and can cause infection when inhaled by others. Some tuberculosis patients do not have detectable bacilli in their sputum, and their infectiousness is relatively much lower.

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Written by Wang Xiang Yu
Pulmonology
1min 17sec home-news-image

Symptoms of tuberculosis

Tuberculosis of the lung presents in many forms, as there are also various types of pulmonary tuberculosis, each exhibiting different symptoms. However, the most common symptoms primarily include coughing and expectoration, which are the most typical manifestations of pulmonary tuberculosis. The cough in pulmonary tuberculosis is generally mild, either dry or producing only a small amount of phlegm. If the tuberculosis is accompanied by cavities, the amount of phlegm may be larger. If there is a bacterial infection in addition to the tuberculosis, the phlegm may become purulent. Some patients with pulmonary tuberculosis may also experience hemoptysis, which can vary in amount from light to severe. A small number of patients may suffer from chest pain and difficulty breathing. Additionally, there are systemic symptoms associated with pulmonary tuberculosis, such as fever (both low and high fever may occur), night sweats, and fatigue, among others.

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Written by Wang Xiang Yu
Pulmonology
1min 14sec home-news-image

Is tuberculosis easily contagious?

Whether tuberculosis (TB) is easily transmitted primarily depends on the source of infection, which refers to the TB patients and the amount of Mycobacterium tuberculosis in their sputum. If TB bacilli can be detected in their sputum, and the quantity is substantial, then their infectiousness is indeed higher. However, if the TB patient has undergone treatment, or if there are only a few TB bacilli in their sputum, or none at all, then their infectiousness may not be as significant. The second factor is the mode of transmission, which mainly occurs through the respiratory tract. If TB patients can be isolated timely, or if they wear masks, and their sputum is properly managed, for example by wrapping the sputum in paper and burning it, then they are less likely to transmit the disease to others. TB generally involves susceptibility issues; even if someone has been vaccinated with BCG or the TB vaccine, they can still be reinfected. Therefore, controlling these three transmission pathways is essential to minimize the risk of contracting TB.