News tagged with intestinal bacteria

Related topics: bacteria

Researchers uncover new knowledge about our intestines

Researchers from Technical University of Denmark Systems Biology have mapped 500 previously unknown microorganisms in human intestinal flora as well as 800 also unknown bacterial viruses (also called bacteriophages) ...

Jul 06, 2014
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One in four has alarmingly few intestinal bacteria

All people have trillions of bacteria living in their intestines. If you place them on a scale, they weigh around 1.5 kg. Previously, a major part of these 'blind passengers' were unknown, as they are difficult or impossible ...

Aug 28, 2013
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New study shows gut bacteria could cause type 2 diabetes

Studying gut bacteria can reveal a range of human illness. Now, new research shows that the composition of a person's intestinal bacteria could play an important role in the development of type 2 diabetes. These results, ...

Sep 26, 2012
popularity 5 / 5 (10) | comments 6 | with audio podcast

How to achieve a well-balanced gut

Creating an environment that nurtures the trillions of beneficial microbes in our gut and, at the same time, protects us against invasion by food-borne pathogens is a challenge. A study published on August ...

Aug 08, 2013
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Gut flora

The gut flora consists of the microorganisms that normally live in the digestive tract of animals. The gut flora includes much of the human flora. The term "gut flora" is interchangeable with intestinal microflora and intestinal microbiota.

The average human body, consisting of about 1013 (10,000,000,000,000 or about ten trillion) cells, has about ten times that number of microorganisms in the intestines. The metabolic activity performed by these bacteria is equal to that of a virtual organ causing some to describe the gut bacteria as a "forgotten" organ.

Bacteria make up most of the flora in the colon and 60% of the dry mass of feces. Somewhere between 300 and 1000 different species live in the gut, with most estimates at about 500. However, it is probable that 99% of the bacteria come from about 30 or 40 species. Fungi and protozoa also make up a part of the gut flora, but little is known about their activities.

Research suggests that the relationship between gut flora and humans is not merely commensal (a non-harmful coexistence), but rather is a mutualistic, symbiotic relationship. Though people can survive with no gut flora, the microorganisms perform a host of useful functions, such as fermenting unused energy substrates, training the immune system, preventing growth of harmful species, regulating the development of the gut, producing vitamins for the host (such as biotin and vitamin K), and producing hormones to direct the host to store fats. However, in certain conditions, some species are thought to be capable of causing disease by producing infection or increasing cancer risk for the host.

This text uses material from Wikipedia licensed under CC BY-SA