A stool culture is done to: 1  Find the cause of symptoms. 2  Find and identify certain types of organisms that are causing infections or diseases. 3  Identify a person who may not have any symptoms of disease but who carries bacteria that can spread infection to others. 4  Find out if treatment for an infection has worked as it should.
Meat may stay in the intestines for 24-72 hours and still depend on its type. Likewise, red meat in particular takes 1-3 days to complete the digestion process because of fat content and high protein, according to Lisa Cicciarello Andrews of University of Cincinnati.
There is no exact science to find out how long it will take for your body to digest food. Hydration and digestive health affect how long it takes your body to digest food. Food moves faster through the digestive track when the body is hydrated. You can estimate how long it will take based on the makeup of the food you eat. For most healthy adults, digestion takes between 24 and 72 hours. Carbohydrates digest faster than proteins, and proteins faster than fats.