Does the BCG vaccine prevent tuberculosis?

Written by Li Jiao Yan
Neonatology
Updated on September 05, 2024
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The BCG vaccine primarily prevents infection by the tuberculosis bacillus, so it can prevent pulmonary tuberculosis. The protective effect of the BCG vaccine is mainly achieved through inducing a cell-mediated immune response. After vaccination, a primary infection is formed, which is processed by macrophages that transmit the antigen information to immune-active cells, leading to the differentiation and proliferation of T cells and the formation of sensitized lymphocytes. When the body is re-infected with the tuberculosis bacillus, the macrophages and sensitized lymphocytes are activated, causing a specific immune response in the body, thereby resisting the infection by the tuberculosis bacillus. Therefore, the BCG vaccine mainly prevents pulmonary tuberculosis.

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Can people with tuberculosis eat lamb?

Tuberculosis is a very common infectious disease in our country. After contracting tuberculosis, symptoms often include coughing, phlegm, hemoptysis, chest pain, low fever, night sweats, fatigue, poor appetite, and weight loss. Generally speaking, as long as one is not allergic to mutton, it can be consumed. However, if the patient has significant poor appetite and weak digestive function, it is better to eat less or avoid mutton to prevent worsening the symptoms due to indigestion. If the digestive function is still relatively good, eating mutton is alright as it is nutritious and can provide energy, benefiting the patient's recovery.

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Is tuberculosis contagious?

Actually, not all cases of tuberculosis are contagious; only those in which tuberculosis bacteria can be found in the sputum are infectious. Many cases are non-infectious. Among all cases of active tuberculosis, only about 30% have detectable tuberculosis bacteria in their sputum. The remaining 70% do not have detectable tuberculosis bacteria and thus are not contagious. Whether tuberculosis is contagious or not, once the diagnosis of tuberculosis is confirmed, scientific and rational comprehensive anti-tuberculosis treatment is required.

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Written by Wang Xiang Yu
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Can tuberculosis be cured completely?

Whether tuberculosis can be completely cured varies from person to person. Most cases of tuberculosis, especially initial occurrences of pulmonary tuberculosis, can be cured in more than 80 to 90 percent of patients if they undergo standardized anti-tuberculosis treatment. However, it is essential that the treatment is standardized; it is not appropriate to simply take medication for one or two months and then stop when symptoms seem to disappear. The treatment duration for pulmonary tuberculosis is considered to be at least six months, and for some patients, it may even extend to a year. However, not all cases of pulmonary tuberculosis can be completely cured. A small percentage of patients may not achieve complete eradication due to resistance to tuberculosis bacteria or intolerance to the side effects of tuberculosis medications. In such cases, the prognosis might be poor, and some individuals may succumb to tuberculosis due to these factors.

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Written by Yuan Lin Yan
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Can tuberculosis be cured?

Tuberculosis can be cured if it is detected early and treated promptly with standard anti-tuberculosis therapy, resulting in a very good prognosis. However, it is very unfortunate if detection is delayed or if standard treatment is not administered, as the tuberculosis may recur or infect with drug-resistant strains, causing permanent damage to lung function. Advanced pulmonary lesions or significant hemoptysis can be life-threatening. Currently, the treatment of tuberculosis involves chemotherapy, with principles including early treatment, combination therapy, appropriate dosing, regularity, and completeness, usually lasting at least six months. Common first-line anti-tuberculosis medications include isoniazid, rifampin, ethambutol, and pyrazinamide. Initially, a two-month intensive phase of treatment with isoniazid, rifampin, ethambutol, and pyrazinamide is followed by a four-month continuation phase with isoniazid and rifampin. During the treatment of tuberculosis, it is important to enhance one's resistance and immune function and to improve nutrition to facilitate recovery. (Use medications under the guidance of a doctor.)

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Can tuberculosis be fatal?

Can tuberculosis be fatal? Of course, the answer is yes. Many diseases can lead to death, even a common cold can potentially result in death, let alone tuberculosis, which is an extraordinary illness. Currently, the mortality rate for tuberculosis patients is relatively low because the treatment for tuberculosis has improved significantly compared to the past. However, there are still a small number of patients who, due to untimely treatment of tuberculosis, discontinuation of medications on their own accord or non-compliance with medical advice, or who have other serious underlying diseases, may not tolerate the tuberculosis treatment. As a result, they could potentially die from adverse reactions to the tuberculosis medications.