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Positive and negative tb test
Positive and negative tb test




positive and negative tb test

ĭespite the discovery of effective vaccines and drugs for TB, about a third of world and a half of world’s immigratory population are still infected with TB. Islamic scientist’s al-Razi and al-Tabari described tuberculosis in their works. It was, wrongly indeed, assumed to be caused by being cursed or depressed. In Iran, It has been a well-known disease since a very long time ago.

positive and negative tb test

The mortality rate is declared to be 7.1% in Iranians and 2.7% in foreigners. In Iran, according to the 2010-11 report of Ministry of Health’s TB and Leprosy Control Department, the incidence rate is 10-24 cases per 100,000 and 16% to 20% of cases are related to foreigners especially Afghans. The global incidence rate is 140 new cases per 100,000 and mortality rate is about 28 per 100,000. According to recent WHO reports, about 8.8 million people fell ill with TB annually. The occurrence of nearly 10 million new TB cases which only two third were “half cured” is more than evident for demonstration of the treat TB poses to healthcare system. It has been estimated that about a third of world’s population are infected by TB sub-clinically. But 10 years later, in 1993, these optimisms were no more than illusory when WHO declared TB a “Global Health Emergency”. In 1982, nearly any medical practitioners believed that tuberculosis would be eradicated before 2000 and its importance will only be confined to studying the history of medicine. Robert Koch and discovery of Bacillus Calmette–Guérin (BCG) vaccine by Albert Calmette and Camille Guérin. The time was nearly synchronous to the identification and description of M. After many unsuccessful attempts to control tuberculosis, it was finally controlled in the late 19 th century.

positive and negative tb test

Historically, tuberculosis rose and fell repeatedly in the form of vast epidemics. Tuberculosis (TB) is considered one of the most important infectious diseases through the course of human history which can affect nearly any organ in the body, but it mostly causes lung infections.






Positive and negative tb test