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Tb pcr genexpertHow Tuberculosis Is Diagnosed: Screenings and Tests
The likelihood that an average person in the United States will be exposed to tuberculosis (TB) is low, but if you think you’ve been exposed to the bacteria that causes this infection, it’s important to get tested.
People can carry latent TB for years before it becomes active, making them sick. Active tuberculosis poses a public health risk because it can spread to others if left untreated. (1)
“Anybody can get TB. It’s an infectious disease,” says Lee Reichman, MD, MPH, the founding executive director at Rutgers Global Tuberculosis Institute in Newark, New Jersey.
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But the disease is pretty hard to spread. It takes six months of eight-hours-per-day contact to get infected with TB or two months of 24-hour contact, he explains.
About 30 percent of people who are exposed to Mycobacterium tuberculosis will develop latent TB, and if that’s left untreated, around 5 to 10 percent of those people could end up getting active tuberculosis disease at some point in their lifetime.
(2)
Since tuberculosis bacteria grow slowly and symptom
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