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Transcript
Tuberculosis – The facts! TB is curable but kills 5000 people every day or 2 million per year. 2 billion people (1/3 of world’s population) are infected with the microbes that cause TB 1 in 10 people infected with TB microbes will become sick with active TB in their lifetime TB is contagious & spreads through the air: if not treated each person with active TB infects 10-15 people every year (approx) Almost 9 million new cases occurred in 2004 What is TB? Tuberculosis is an infectious disease caused by bacteria (mycobacterium tuberculosis) The TB bacteria usually attack the lungs but it can also attack the kidneys, spine & brain. It is fatal if untreated. How is TB spread? TB germs are spread from person to person through the air. The bacteria are put into the air when a person with active TB coughs or sneezes. When a person breathes in TB bacteria they settle in the lungs & begin to grow, from there they can move through the blood to other parts of the body Not everyone infected with TB gets sick. People can have latent TB infection they don’t feel ill, have any symptoms & can’t spread TB to others. These people can go on and get the TB disease. How would you know if you had TB? Symptoms: Bad cough lasting 3 weeks or more Chest pain Coughing up blood or sputum Weakness / tiredness Weight loss Sweating at night No appetite Chills Fever With these symptoms people can spread TB to others. Estimated number of TB cases 2004 World Region Number (thousands) Africa 2573 North / South America 363 E. Mediterranean 645 Europe 445 South East Asia 2967 Western Pacific 1925 Why the global increase of TB? Population growth Urbanisation Increasing poverty Rates of HIV infection – this weakens the immune system. If HIV + 100x more likely to develop TB. Drug resistant TB (costs for LEDCs?) Young adults & women aged 15-44 , most at risk Poorly managed TB programmes – especially in LEDCs (Africa & SE Asia)
