Using tissue samples or various body fluids like blood, urine, wound pus, saliva, breast milk, etc., a culture and sensitivity test is used to assess the growth of germs and bacteria. The culture and sensitivity test, which is applied to tissue, is also known as the culture sensitivity aerobic test or C/S Aerobic tissue. A tissue sample from any part of the body is subjected to a culture sensitivity test to look for the growth of the germs and bacteria that are the source of the infection. This test is done both before and after the sickness you have is treated to see how the treatment is working and to see if the disease-causing microorganisms still have a strong hold on your body.