Tuberculosis is caused by bacteria and was once a feared disease. A rare disease in Sweden today, it has begun to increase recently as we travel more. The infection is airborne and highly contagious. If you are believed to be at particular risk of the disease at your first prenatal visit, a decision will be made whether you should have a chest x-ray and, in some cases a tuberculin test to see if you are infected. This is done if you have, for instance, a persistent cough, if you have been in contact with someone who has TBC, or if you have been in a country where TBC is more common. If you know that you had TBC before you got pregnant, you need to have an exam to assess your lung function.
If you are infected while you are pregnant, there is a risk that the infection will pass to the baby in your womb and at childbirth. The infection will be treated with antibiotics. Treatment usually involves taking several different drugs for several months.
Source: - https://www.cdc.gov/tb/