1 Charge costs to cost objects. 2  Use an activity driver to allocate the contents of each primary cost pool to cost objects. 3  There will be a separate activity driver for each cost pool.
1 People who have a positive TB skin test with a normal chest X-ray are NOT contagious, but may need medicine to prevent them from ever getting active TB. 2  Children under the age of 12 with active TB are rarely contagious, and do not need to be kept out of school.ow often does a TB test have to be repeated? If you have a negative skin test, you need a repeat test at least every four years. If you have a documented positive skin test, you must have an initial chest X-ray. After that, you still need to be screened every four years.
TB diagnostic tests. These are TB tests which can be used to determine if someone has latent TB, which means that they are infected with TB bacteria. There are also TB tests, which when considered alongside other factors, such as whether someone has TB symptoms, can confirm a diagnosis of active TB or TB disease.Even if a person has symptoms, TB is often difficult to diagnose, and is particularly difficult to diagnose rapidly.alse positive results happen with the TB skin test because the person has been infected with a different type of bacteria, rather than the one that causes TB. It can also happen because the person has been vaccinated with the BCG vaccine. This vaccine is widely used in countries with high rates of TB infection.