The human body is a host to thousands of species of bacteria. The bulk of these bacteria live in the human intestinal tract or the gut. These bacteria perform activities that are beneficial to the body.
Bacteria that are not harmful and are beneficial to the body are said to be part of the normal flora. Since "flora" pertains to plants, the term "biota" is also used although generally, flora is an accepted word to describe this microsystem.
Human gut flora, consists of an average of 500 different species. They serve various beneficial functions such as fermenting unused energy substrates, training the immune system, preventing growth of harmful, pathogenic bacteria, regulating the development of the gut, producing vitamins (such as biotin and vitamin K) for the host, and producing hormones to direct the host to store fats.
Although the relationship of gut flora and the human body is generally beneficial and mutual, there are certain situations and conditions that bacteria can cause infections, disease, and even cancer.
Gut bacteria could cause diabetes
The number of people suffering from type 2 diabetes world-wide has risen rapidly in recent years, and scientists estimate that just as many people could be suffering from the illness without realising it. New research now indicates that your gut bacteria can reveal whether you suffer from the disease.
"We have demonstrated that people with type 2 diabetes have a high level of pathogens in their intestines," says professor Jun Wang from the University of Copenhagen's Department of Biology and Novo Nordisk Foundation Center for Basic Metabolic Research.