Culture and Sensitivity Aerobic test is one that is conducted on pericardial fluid. This helps to measure the level of culture of a microorganism in the pericardial fluid. This test helps to confirm the presence of pericardial infection and it also helps during the treatment phase and post-treatment phase. This kind of test gives a clear picture of how much the culture of microorganism has spread inside the pericardial fluid and that gives an idea to doctors about the magnitude of the infection. Having appropriate knowledge about the entire condition of pericardial fluid helps in proper diagnosis and timely treatment.