Many people think that a yellow or green nasal discharge means a bacterial infection, which requires antibiotics but it is not true. It can be a sign that your body is being attacked by either a bacteria or a virus. That said, a yellow discharge does not necessarily indicate a sinus infection.
After the stool is placed in the culture, it may take two to three days for any bacteria that is in the stool to grow. These bacteria can then be isolated and examined under a microscope so that they may be identified. The stool may also be tested for parasites or eggs.
Results. A stool analysis is a series of tests done on a stool (feces) sample to help diagnose certain conditions affecting the digestive tract. The normal values listed hereâcalled a reference rangeâare just a guide. These ranges vary from lab to lab, and your lab may have a different range for what's normal. A stool culture is done to find the cause of an infection, such as bacteria, a virus, a fungus, or a parasite. 2  To learn more, see the topic Stool Culture. 3  A bowel transit time test is done to help find the cause of abnormal movement of food through the digestive tract. 4  To learn more, see the topic Bowel Transit Time.