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However, most infections with M. tuberculosis do not cause disease, [169] and 90–95% of infections remain asymptomatic. [87] In 2012, an estimated 8.6 million chronic cases were active. [170] In 2010, 8.8 million new cases of tuberculosis were diagnosed, and 1.20–1.45 million deaths occurred (most of these occurring in developing countries).
The main result was a relative risk (RR) of 0.40 (95% confidence interval (CI) 0.31 to 0.52) for development of active tuberculosis over two years or longer for patients treated with INH, with no significant difference between treatment courses of six or 12 months (RR 0.44, 95% CI 0.27 to 0.73 for six months, and 0.38, 95% CI 0.28 to 0.50 for ...
The main result was a relative risk (RR) of 0.40 (95% confidence interval (CI) 0.31 to 0.52) for development of active tuberculosis over two years or longer for patients treated with INH, with no significant difference between treatment courses of six or 12 months (RR 0.44, 95% CI 0.27 to 0.73 for six months, and 0.38, 95% CI 0.28 to 0.50 for ...
In tuberculosis-endemic regions, tuberculous pericarditis accounts for 50-90% of cases of effusive pericarditis, depending on HIV status. [6] In developed countries, it only accounts for about 4% of cases. [6] Tuberculous pericarditis is a deadly disease with a mortality rate of up to 40% in the first 6 months after diagnosis. [6]
About 2% of all cases of tuberculosis are considered Pott's Disease [12] and about half (50%) of the cases of musculoskeletal tuberculosis are Pott's Disease, [6] [13] of which 98% affect the anterior column. The disease can be attributed to 1.3 million deaths per year.
It is possible that, following an initial tuberculosis infection resulting in bacteremia, a foci of granulomatous inflammation may coalesce into a caseous tuberculoma. [20] Pulmonary tuberculomas may arise due to repeated cycles of necrosis and re-encapsulation of foci, or, alternatively, the shrinkage and fusion of encapsulated densities.
A definitive diagnosis of tuberculosis can only be made by culturing Mycobacterium tuberculosis organisms from a specimen taken from the patient (most often sputum, but may also include pus, CSF, biopsied tissue, etc.). [1] A diagnosis made other than by culture may only be classified as "probable" or "presumed".
One of their studies found that 75% of newly diagnosed inmates with TB are resistant to at least one drug; 40% of new cases are multidrug-resistant. [84] In 1997, TB accounted for almost half of all Russian prison deaths, and as Bobrik et al. point out in their public health study, the 90% reduction in TB incidence contributed to a ...