One of the main realities of microorganisms and the life that surrounds us is that they are everywhere. Yes, you read that right, absolutely everything we touch, look at, eat and even breathe is full of bacteria, moreover, millions of them. But how do our bodies live with this?
Since the beginning of Western medicine, due to the various advances in the life of microorganisms and pathogens, bacteria have had a bad reputation. What few really know is that bacteria are absolutely necessary for many of our biological processes and essential for the development of life on earth as we know it.
Bacteria necessary for our biological functioning
Currently, microbiologists are dedicated to investigating a specific group of bacteria that play a very important role in human health. It is nothing more and nothing less than approximately 100 billion «good» bacteria that inhabit our body. Although their work is not well known, many of them are necessary for the digestion of food, the synthesis of proteins and even the production of energy.
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Most bacteria are excellent allies for other organisms, such as humans, for example. It would be hard to believe, but more than billions of bacteria live and multiply constantly inside our bodies, outnumbering our cells roughly 10 to 1. Only about 100 species of bacteria are pathogenic and can get sick.
On a large scale, these pathogens can cause various health problems, and while there are some mild ones, there are potentially quite serious infectious bacteria. infectious diseases They are the second cause of death in the world and both bacteria and viruses are listed as the main killers. For example, The tuberculosis It causes about two million lives every year. On the other hand, the bacterium Yersinia pestisknown to cause the deadly bubonic plague in the middle ages, it killed about a third of the population of Europe in the 14th century.
Researchers have made considerable progress in recent 100 years in domestication of some species with antibiotics, but harmful bacteria have also found ways to resist many of these drugs. This is an arms race that human beings have been losing in recent times, in part because we have not understood our enemy very well.
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