Communicable diseases are those able to be transmitted from one person to another; diseases that are contagious or infectious.
The local Health Department is responsible for investigating reportable communicable diseases. Results are submitted to the Indiana State Department of Health (ISDH), per Indiana code IC 16-41-2-1 and 410 IAC 1-2.3-47.
The site of the test needs to be observed and felt by a trained TB test administrator for an official "reading". Sometimes subtle changes have occurred that must be "felt". If the person does not come back for a reading in 48 to 72 hours, the test must be repeated at the person's expense.
A BCG vaccine is given in countries with a lot of TB. It is only good for about 5 years to help prevent active TB. Then it wears off. Anyone with a history of BCG who develops a positive TB test is considered to have been infected with TB and will need a baseline X-ray to rule out active TB.