How does tuberculosis infect have illness coming on and infect _'s general knowledge

How does tuberculosis infect, have illness coming on and infect _'s general knowledge
The infection source of tuberculosis is mainly to discuss the slide positive pulmonary tuberculosis arranges the fungus patient. Infect sources, the tuberculosis fungus could be passed to others through certain route. The pulmonary tuberculosis patient mainly disseminates the little foam with tuberculosis fungus in the air through coughing or sneezing etc., healthy people suck the little foam with tuberculosis fungus and can be infected by tuberculosis fungus one.
Intensity that tuberculosis infect arrange the intersection of fungus and quantity, cough symptom and the intersection of close intensity,etc. and influence of factor that exposed to the intersection of tuberculosis and patient mainly. Elders such as parents or grand parents,etc. have tuberculosis in the family, children are apter to be infected by tuberculosis fungus one.
After healthy people are infected by tuberculosis fungus, tuberculosis might not happen, tuberculosis happens, mainly influenced by two kinds of factors, is infected with the size of the fungus virulence of tuberculosis and influence of the resistance level of the health, fungus virulence strong tuberculosis and health resistance low and apt to take place tuberculosis. After the human body is infected by tuberculosis fungus for the first time, usually most persons do not have any symptom, tuberculosis does not happen either. But when the person who minority are infected with the tuberculosis fungus reduces resistance, can tuberculosis happens in one year at any time. The probability of tuberculosis is about 10%.
Prevent or reduce, take place measure of tuberculosis to infect by the tuberculosis fungus at first, tuberculosis would not happen if not infected with by the tuberculosis fungus. So, it is very important to postpone being infected with age by the tuberculosis fungus. How to know that is infected by tuberculosis fungus? Pure albumen of main application tuberculin derivative (PPD) Carry on the skin test, judge according to the skin reaction result.
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