If someone has a positive PPD test and is awaiting to? Do the? X-ray? Should they be? Be isolated?

Difficult to spread. Tb is a very slow growing germ that is unlikely to spread unless the person has a persistent cough, bloody sputum or other signs of active disease. Those with asymptomatic conversion of a PPD are unlikely to spread it casually. Intimate contact for extended periods may spread it so households of a positive case are often screened in the process.