The World Health Organization estimates that about one-third of all people are infected with bacteria that cause tuberculosis. Most times, the infection remains inactive. But each year about eight million people develop active cases of TB, usually in their lungs. Two million people die of it. ...
Although U.S. cases are low in the general public (9,400 cases in 2014), TB remains a common cause of sickness and death in residents living with HIV despite a declining number of new cases overall. Although TB is most often seen in the lungs, it can also affect lymph nodes, bone m...
Infection is usually not transmissible in the primary stage and is never contagious in the latent stage. Primary TB infection Infection requires inhalation of particles small enough to traverse the upper respiratory defenses and deposit deep in the lungs, usually in the subpleural airspaces of the ...
Tuberculosis (TB) is a contagious airborne disease affecting the lungs and other organs. Reviewed by a board-certified infectious disease healthcare provider.
The bacteria that cause TB usually settle in the lungs.They spread through the air when the person coughs or even sings and talks. One of the most important things is to identify cases quickly.The patients need to be kept away from other people and begin treatment as soon as possible. Mul...
which digests elastin.Many people with TB feel tired all the time.Suggest and explain how the effect of phagocytes on tissues in the lungs leads to people feeling tired all the time.[3](b)Discuss the biological factors and social factors that make TB a difficult disease to control.[5] ...
Is TB curable in adults? Tuberculosis (TB) is caused by bacteria (Mycobacterium tuberculosis) that most often affect the lungs.Tuberculosis is curable and preventable. TB is spread from person to person through the air.
Following initial infection by Mtb, the infectedimmune cellsin the body can clump together in the lungs in a cellular mass that is surrounded by a fibrous cuff. This containing structure, called a tubercle, physically protects the bacteria from being destroyed by the immune system. This allows ...
tuberculosis, the bacteria multiply within macrophages, and tubercles form in the lungs. In vitro studies have shown that intracellular survival and growth of M. tuberculosis within human macrophages is enhanced by exposure to alcohol [38–40]. It has also been shown that alcohol use exacerbates ...
5ThetransmissionwayofTB 6HPreventionofTB 3 Pulmonary TuItbisearcchurolnoicsiinsfe:ctious disease(慢性感染性疾病)causedbyabacteriumcalledMycobacteriumtuberculosiswhichmayinvadethebodyofavarietyoforgans,especiallythelungs.H 4 ClassificationofTB:Primarypulmonarytuberculosis Hematogenousdisseminatedpulmonary tuberculosis Se...