Roughly one-third of the world's population has been infected with M. tuberculosis, with new infections occurring in about 1% of the population each year. However, most infections with M. tuberculosis do not cause TB disease, and 90–95% of infections remain asymptomatic. In 2012, an estimated 8.6 million chronic cases were active. In 2010, 8.8 million new cases of TB were diagnosed, and 1.20–1.45 million deaths occurred, most of these occurring in developing countries. Of these 1.45 million deaths, about 0.35 million occur in those also infected with HIV. COUNT 5
QSN1 At any given time, about how much of all the people in the world has M. tuberculosis? ANS1 one-third QSN2 Approximately how many active TB cases were there in 2012? ANS2 8.6 million QSN3 How many patients were diagnosed with tuberculosis in 2010? ANS3 8.8 million QSN4 About how many people died in 2010 carrying both HIV and TB? ANS4 0.35 million QSN5 What percentage of the world's total population gets infected with tuberculosis every year? ANS5 1%