It means that bacteria that cause tb (mycobacterium tuberculosis) were not detected in his chest fluid. In other words, he does not have tb
however, any chest infection potentially affects children more easily and in a worse manner. It might be good to keep grandparent and child separate for some time. Having said that, 1. Children less than 5 years are at increased risk
2. After antibiotics are given once, spread of infection decreases.
A minor pleural effusion often goes away on its own without treatment. In other cases, doctors may need to treat the condition that is causing the pleural effusion. ... Pleural effusion can also be treated by removing fluid from the pleural space. This may help relieve symptoms, such as shortness of breath and chest pain.