By Dr Ananya Mandal, MD. Life expectancy refers to the number of years a person is expected to live based on the statistical average. Life expectancy varies by geographical area and by era. In the Bronze age, for example, life expectancy was 26 years, while in 2010, it was 67 years.In mathematical terms, life expectancy refers to the expected number of years remaining for an individual at any given age.ife expectancy varies by geographical area and by era. In the Bronze age, for example, life expectancy was 26 years, while in 2010, it was 67 years. In mathematical terms, life expectancy refers to the expected number of years remaining for an individual at any given age.
What It Is. A stool (feces) sample can provide doctors with valuable information about what's going on when a child has a problem in the stomach, intestines, or other part of the gastrointestinal (GI) system. A stool culture helps the doctor determine if there's a bacterial infection in the intestines.A technician places small stool samples in sterile plastic dishes containing nutrients that encourage the growth of certain bacteria.hat It Is. A stool (feces) sample can provide doctors with valuable information about what's going on when a child has a problem in the stomach, intestines, or other part of the gastrointestinal (GI) system. A stool culture helps the doctor determine if there's a bacterial infection in the intestines.
The Test Sample. What is being tested? The stool culture is a test that detects and identifies bacteria that cause infections of the lower digestive tract. The test distinguishes between the types of bacteria that cause disease (pathogenic) and the types that are normally found in the digestive tract (normal flora).