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.
A stool culture can find out what bacteria, viruses, parasites, or fungi may be causing an infection. For a stool culture, you collect a stool sample in a clean container. Then you bring it to a lab where the bacteria or other organisms are allowed to grow.To find out what type of infection you have, the person doing the test will do chemical tests and look at the sample under a microscope. Depending on what your stool is being tested for, you may only need to collect one stool sample.Or you may need several stool samples over a period of days.o find out what type of infection you have, the person doing the test will do chemical tests and look at the sample under a microscope. Depending on what your stool is being tested for, you may only need to collect one stool sample.