And because the oceans cover 70% of our planet ...

Bacteria suffer from the negative public relations. You probably associate bacteria with the three Ds: dirt, disease and death. Indeed, for centuries had bacterial infections, the main cause of worldwide infant and child mortality. Infant mortality began to decline once people were aware of better hygiene. The fall continued with the introduction of antibiotics for better treatment and vaccines for the prevention of common fatal disease. Bacteria, of course, is involved in dirt, disease and death to which we must add the collapse. Destruction of food debris, decomposition of garden cuttings, the collapse of the slain, or smelly water in the vase forget all the result of bacteria. As the body odor, tooth decay, sore throat, or bubonic plague, and many other diseases at both ends of the spectrum. Not surprisingly, the bacteria were negative reviews in the press. Advertise want us to believe that the only good bacteria are dead bacteria. Antiinfectives added to toothpaste, soap, detergents, and plastics. There is no Society for the Protection of bacteria, although there are satirical initiative for the Ethical Treatment of bacteria. Some bacteria can even hover on the brink of extinction, and it is no coincidence that these pathogens (disease-causing) bacteria such as Salmonella

typhoid fever (cause typhoid fever) and Yersinia plague (cause fever). Fortunately for the little creatures, populations survive in remote areas where they will not hunt effectively through vaccines and antimicrobial drugs, and people are more at risk for diseases that they cause in these places. It is about time we carefully look at the bacterial Kingdom, with their capitals. For the Kingdom is biologically speaking, and of ancient origin, diversity and evolutionary force its citizens deserve the royal treatment, but not immediately. Before fueling charm the world of bacteria, a common misconception must be cleared:

bacteria not viruses. While most bacteria live as independent cells with a membrane to separate them from the outside world, viruses can multiply only inside and on the damage they infect cells. Interestingly, some viruses, called bacteriophages, specializing in infection by bacteria. 2.3

Viruses consist only of genetic material (DNA or RNA) surrounded by protein coat. They can not assimilate and got into a host cell, their genetic material of cells takes equipment to produce copies of the virus. Bacteria are much more like you and me. They have the basic characteristics of all living creatures they are breathing, metabolism, produce waste, and maintaining membrane potential. However, they have no nucleus, where their DNA is separated from other cells, like plants and animals and is a major difference between prokaryotes (cell type that most organisms are made, including all bacteria) and eukaryotes (different types of cells that make up the nuclear micro-organisms such as yeast or cells in the body, such as man). And viruses and bacteria can cause disease. However, not all types of viruses cause disease in humans, and not all bacteria cause disease. Another common misconception is that all bacteria are bad for you. Some bacteria youd better not meet, but most are completely harmless and some are very useful for us. Surprisingly, some bacteria may be useful for some animals, and other pathogens. Most pathogenic bacteria are harmful only to a limited number of hosts, or even only one, while they live happily in other hosts, without causing problems. If you suffer from the owner will be someone responsible for pathogenic bacteria known to man, but from the bacterial point of view, people are just wrong host is in. So who is to blame for the disease? Although the tree can kill a man when he falls, we usually think of trees DONT harmful. The same is true for most bacteria, although they can cause problems under certain conditions, they usually live their life without interfering in ours. An example is

Pseudomonas aeruginosa, which normally lives in the soil without causing damage. However, if he breathes a person with cystic fibrosis, it can colonize their lungs and cause fatal infections. For many bacteria, the human body is not the right place for life in general. They could not cope with the lack of oxygen (in our cells of oxygen concentration is lower than in the air) or in the presence of oxygen (for bacteria that live in oxygen deprived environments, oxygen is toxic). They could not sustain our defense mechanisms, such as salt on our skin and our tears, lack of iron (intelligent device stores of iron, a vital element for all living organisms that are not available for most microorganisms in our body), or toxic radicals that cells isolated in case of attack bacteria. It may be too warm for them, or too cold, as some bacteria have specific requirements for temperature rise. Or they may be deprived of food, and members of the Bacterial Kingdom specializing in the life of almost nothing, but each species has specific needs for nutrients. In conclusion, we have little to fear most bacteria that we face. This is not surprising that we are on inert against bacteria. Finally, mammals have evolved in the presence of bacteria, and have developed specialized strategies to keep bacteria under control. Contrary to what your mother taught you, soap is not necessary to survive. Our body can resist the bombardment of bacteria every day it gets pretty effectively. Well, we can not see them (the idea unpleasant), but with every breath of air to each piece, little mistakes, not knowing enter our body. And this should not worry you at last. As long as strattera 25mg you keep offenders from real agents. We house millions of bacteria on the skin and in the nose, mouth and intestines:

Strictly speaking, in our mouth, stomach and intestines are part of our foreign surface. Despite the fact that they are inside our body, its surface are in direct contact with the outside world and how food particles are internal mucous lining our intestines, hitchhiking bacteria can stay there and multiply. We are born, sterile (no bacteria), but within hours we colonized our little friends, not to stay alone. No bacteria will not survive. They help us digest food, produce vitamins and occupy a niche that could be available to competing pathogens. This competitive effect is obvious when we destroy most of our intestinal flora, for example, with antibiotics used to treat bacterial infections. Diarrhea is often a desirable result, as foreign bacteria are a chance to take the empty niche. Healthy bacteria take time, so in most cases, side effects of antibiotics soon followed. Bacterial growth in population in equilibrium until some external factor interferes with it again. For centuries, people eat a certain food for bacteria known to it and use the bacteria in cooking. The best known example is the consumption of yogurt and other dairy products which have a total lack of effect of reduction and increase tolerance of partial lactose intolerance people. The main industry has developed for the production of bacterial preparations in the form of powders, drinks and dairy products, and is sold as a healthy and useful (and sometimes deliciously) supplements. While some of his promises are unrealistic (some products do not contain viable bacteria) are usually accepted that some bacteria are beneficial, especially in unbalanced intestinal flora (such as antibiotic-associated diarrhea). The most commonly used types of bacteria as a so-called probiotics lactobacilli and bifidobacteria

. The number of bacteria needed for cooking, and may or may not come alive on the plate. Notably, many varieties of cheese depends on the specific bacterial fermentation. Maturation of bacteria needed for the production of sausages and sauerkraut, they even help the cocoa and coffee beans to achieve the desired taste. In gram of soil, approximately 10

and it is estimated to represent more than 10,000 species. Interestingly, over 10

bacteria on Earth, compared with less than 10 people

. Bacteria were the first living organisms on Earth. They live in deserts, polar caps, oceans and hot springs. The number of species of bacteria worldwide is estimated at more than a thousand million. Their individual sizes may be small, but their number and variety of incredibly large. Bacteria make a significant contribution to the total biomass in the marine environment. And because the oceans cover 70% of the surface of our planet, bacteria represent a significant portion of the total biomass on Earth. These facts really impressive to organisms so small that they are invisible to the eye. It is in our interest to look at not only bacteria pathogens. 2002 American Institute of Biological Sciences. Educators have permission to reprint articles for use in the classroom, other users, please contact

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