Can a Strongly Positive PPD Test Result Indicate an Infectious Condition?

Update Date: Source: Network

PPD strong positivity itself is not contagious, and the key is the location of the infected Mycobacterium tuberculosis. If it is pulmonary tuberculosis, it is contagious, while the presence of lymphatic tuberculosis or vertebral tuberculosis is not contagious. Therefore, PPD strong positivity can only indicate the infection of Mycobacterium tuberculosis, but cannot indicate that the patient is contagious. It is best to further examine and then carry out tuberculosis treatment to avoid affecting the patient's physical health.

1. Is PPD strong positivity contagious?

A strong positive PPD test suggests possible active tuberculosis. The PPD test itself is not contagious, and the general indication of tuberculosis transmission mainly refers to the transmission of pulmonary tuberculosis. If the patient's clinical symptoms are typical symptoms of tuberculous poisoning, and the imaging of the lungs also suggests possible tuberculosis, and the PPD test is strongly positive, such patients are contagious and need to be vigilant against tuberculosis transmission and receive timely anti-tuberculosis treatment. If the PPD test is strongly positive, it does not necessarily mean that it is pulmonary tuberculosis. It may also be tuberculosis in other parts, such as lymphatic tuberculosis, vertebral tuberculosis, etc. Such tuberculosis is not contagious and does not require too much concern. Regular anti-tuberculosis treatment is sufficient.

2. Reasons for strong positivity of PPD

A strong positive PPD test can only indicate the state of Mycobacterium tuberculosis infection, and whether it is pulmonary tuberculosis or tuberculosis in other parts can only be diagnosed by X-ray. A strongly positive PPD pattern is equivalent to having tuberculosis. A strongly positive PPD test is not a serious illness. To prevent the onset of the disease, people with strongly positive PPD tests must take prophylactic medication, generally receiving continuous treatment with isoniazid and rifampin for 3 months or continuous treatment with isoniazid for 6 months. A strongly positive PPD test indicates that your body has produced tuberculous antibodies, which means that the body has the ability to fight against Mycobacterium tuberculosis. This antibody can last for many years or even a lifetime.