Is tuberculosis infectious?

Written by Xiong Hong Hai

Infectious Disease

Updated on September 14, 2024

00:00

00:00

Only patients whose active phlegm contains tuberculosis bacteria are infectious. Many cases of tuberculosis are actually non-contagious. For example, extrapulmonary tuberculosis, such as lymph node tuberculosis, tuberculous pleurisy, and tuberculous meningitis, are not contagious. Pulmonary tuberculosis patients, whose phlegm contains tuberculosis bacteria, are contagious and need appropriate respiratory isolation and should begin anti-tuberculosis treatment as soon as possible. Through anti-tuberculosis treatment, contagious pulmonary tuberculosis can become non-contagious.

Other Voices

home-news-image

Written by Xie Zhi Hong

Cardiology

50sec

home-news-image

Is the disease with symptoms of chest tightness, shortness of breath, difficulty breathing, and palpitations tuberculosis?

Tuberculosis can cause symptoms such as fever, night sweats, cough, and hemoptysis, and in severe cases, it can lead to chest tightness, shortness of breath, and palpitations. However, if a patient experiences shortness of breath, difficulty breathing, and palpitations without symptoms like fever, hemoptysis, or night sweats, it is advisable to consider heart disease or chronic lung disease, or pneumonia leading to cardiopulmonary insufficiency. To rule out these conditions, examinations such as a chest CT and cardiac echocardiography should be conducted. Patients experiencing chest tightness and difficulty breathing are advised to seek medical attention at a hospital as soon as possible.

home-news-image

Written by An Yong Peng

Pulmonology

57sec

home-news-image

Does tuberculous pleuritis belong to pulmonary tuberculosis?

Tuberculous pleurisy is not classified as pulmonary tuberculosis. Tuberculous pleurisy is a common manifestation of extrapulmonary tuberculosis, often referred to as tuberculosis of the pleura, typically presenting with pleural effusion. Symptoms can sometimes include low-grade fevers in the afternoon and night sweats, which are typical of tuberculosis intoxication. However, the clinical presentation of tuberculous pleurisy can sometimes be atypical, with some patients experiencing high fevers, and there are cases of tuberculous pleurisy without any fever. Additionally, tuberculous pleurisy often coexists with pulmonary tuberculosis. Sometimes, patients with tuberculous pleurisy who undergo a chest CT scan may find lesions in the lungs, but there are also cases where tuberculous pleurisy may exist independently, without the presence of pulmonary tuberculosis.

home-news-image

Written by Xiong Hong Hai

Infectious Disease

46sec

home-news-image

What should be noted in the diagnosis of tuberculosis combined with AIDS?

The diagnosis of tuberculosis in individuals infected with AIDS generally involves examining certain clinical symptoms such as coughing, expectoration, low-grade fever, night sweats, and blood in sputum. Additionally, it requires analysis of specific characteristics in chest imaging, such as tuberculosis lesions identified in chest CT scans that are relatively specific. Microbial tests on sputum, such as sputum culture and acid-fast bacillus smear, are also essential. When necessary, tests for tuberculosis-infected T-cells can be conducted to provide a comprehensive diagnosis. After diagnosing concurrent pulmonary tuberculosis, anti-tuberculosis treatment is required.

home-news-image

Written by Wang Chun Mei

Pulmonology

47sec

home-news-image

Is a shadow on the lung definitely tuberculosis?

Shadows in the lungs are primarily revealed through imaging studies, a characteristic feature found in radiology. Clinically, lung shadows can be caused by tuberculosis, various lung tumors, or inflammatory lesions, which are also detected via imaging studies. Hence, the causes of lung shadows are numerous and complex in clinical settings. Discovering a shadow on the lungs through X-ray does not necessarily indicate tuberculosis. A definitive diagnosis should be based on a detailed patient history, other relevant clinical manifestations, and additional diagnostic tests. While tuberculosis might be a likely cause of lung shadows, it is not the cause in every case.

home-news-image

Written by Li Hu Chen

Imaging Center

1min 2sec

home-news-image

Tuberculosis X-ray Chest Radiograph Manifestations

If it is tuberculosis, it is generally visible on an X-ray chest film. Of course, some especially early-stage or tiny lesions might not be detected except by CT. However, typical cases of tuberculosis can be diagnosed with a chest X-ray. Often, on the chest X-ray, the apices of both lungs—the uppermost parts—might show cloud-like, vague shadowy areas that are slightly brighter than the normal lung tissue but with unclear edges. Additionally, there are some cases of secondary tuberculosis, which are more severe, featuring tuberculomas which are more evenly dense and have smoother edges. These can be seen in the lungs. However, such typical severe tuberculomas are becoming less common clinically because medications are used more promptly now, and people seek treatment in a timely manner. Cases like chronic fibrocavitary tuberculosis are becoming increasingly rare, mostly seen in older patients who have been on medication for many years.