Concept in Definition ABC

Bacteria are microorganisms unicellular, with their own mobility and showing a very small size and diversity in its shape: spheres, rods, propellers, among others.

The bacteria are the organisms that are most abundant on planet earth and which we can find in the most diverse habitats, even in those that suppose the most unfavorable conditions for the subsistence of any organism alive.

From the ground, hot and acidic springs, following by waste radioactive, even in the depths of the seas, of the Earth crust and in the most inhospitable places of outer space, they are some of the places where we can very easily find tiny bacteria.
Approximately and to give you an idea of ​​the proliferation of these and that it is not a pure story, it has been calculated that there are 40 million bacterial cells in one gram of soil and one million in one milliliter of water candy.

On the other hand, in the human body itself we find that there are ten times as many bacterial cells as human cells, many of them domiciled in the tract. digestive system and the skin, however, the immune system that humans have, makes their action practically harmless and even in some cases even beneficial.

Meanwhile, there are some pathogenic bacteria that are the vehicle of dangerous bacterial infections such as cholera, syphilis, leprosy, typhus, diphtheria and scarlet fever, but respiratory bacterial infections will be those that can cause death in humans, such as tuberculosis.

To counteract the effect harmful of some bacteria antibiotics will normally be used since these are the only ones that inhibit the formation of their cell walls and even stop some of their life cycles.

But, paradoxically, bacteria turn out to be essential in some tasks such as recycling certain elements, for some industrial processes, such as wastewater treatment and in the food industry for the production of cheeses, yogurts, butters, vinegars, among others. Also, the manufacturing of some drugs and other chemicals depend on the presence of these for their realization.

Bacteriology, a branch of the microbiology deals with the study of bacteria.