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Miliary tuberculosis is a form of tuberculosis that is characterized by a wide dissemination into the human body and by the tiny size of the lesions (1–5 mm). Its name comes from a distinctive pattern seen on a chest radiograph of many tiny spots distributed throughout the lung fields with the appearance similar to millet seeds—thus the term "miliary" tuberculosis.
Even though it sounds bad, most people at this stage are actually asymptomatic or maybe have a mild flu-like illness. About 3 weeks after initial infection, cell-mediated immunity kicks in, and immune cells surround the site of TB infection, creating a granuloma, essentially an attempt to wall off the bacteria and prevent it from spreading.
This severe form of TB disease, most common in young children and those with HIV, is called miliary tuberculosis. [97] People with this disseminated TB have a high fatality rate even with treatment (about 30%). [53] [98] In many people, the infection waxes and wanes. Tissue destruction and necrosis are often balanced by healing and fibrosis. [94]
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However, lesions may appear anywhere in the lungs. In disseminated TB a pattern of many tiny nodules throughout the lung fields is common - the so-called miliary TB. In HIV and other immunosuppressed persons, any abnormality may indicate TB or the chest X-ray may even appear entirely normal. [citation needed]
Cases of a respiratory virus that causes flu-like symptoms are surging in China, raising plenty of questions about what this could mean for the rest of the world. ... “For most people, HMPV is a ...