I'm going to post some of the articles/information sheets that I found on the topic of positive ppd tests in kids who were adopted internationally.

The first is from Winthrop University Hospital's International Adoption Program:

Q: If my child has a positive skin test for tuberculosis (positive PPD) does that mean my child has tuberculosis?

A: A positive PPD means the child has been infected with Mycobacterium tuberculosis, the bacterium that causes tuberculosis. However, this does not mean the child is sick or has tuberculosis disease. Infection means the bacteria is present in the body; disease means the bacteria are now harming the body and causing symptoms. For tuberculosis, years might pass from the time of infection until the time disease develops in the lungs. We have found about 20% of our internationally adopted children have a positive PPD, meaning they have latent tuberculosis infection. All of these children have had negative chest x-rays, telling us they are free of disease. Tuberculosis at this stage is not dangerous, does not affect the child's health in any way and is completely curable with an antibiotic. The child is also not contagious to others at this time and no restrictions or special precautions are indicated.

Q: If my child received a tuberculosis vaccine (BCG vaccine) in the country of origin, won't that cause a false positive skin test for tuberculosis?

A: No. If the skin test reaction is equal to or greater than 10 mm in size, this indicates infection, regardless of a history of BCG vaccination, if the child comes from a country with a high incidence of tuberculosis. The World Health Organization reports 22 countries account for 80% of global tuberculosis in 2006, and the list includes the Russian Federation, China, Vietnam, Cambodia, the Philippines, India and Pakistan. Tuberculosis continues to be a global epidemic problem and many other countries not listed still have a high incidence of TB in their populations. To prevent future disease and complications, it is important to accurately identify those who have tuberculosis infection and treat them appropriately.