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What harm do bacteria do to humans?

  • Microorganisms, they are also microbes, are such tiny living beings that it is impossible to see them with the naked eye without using a magnifying technique.

    They are everywhere where you can find water: high in the mountains, at a depth of tens of thousands of kilometers in water bodies, in the earth's crust, and so on. Microbes are very tenacious, they adapt to such living conditions that are fatal to other organisms, for example, they survive at extremely low temperatures (below –100 ° C).

    Bacterial infections are considered one of the most dangerous - humanity has been fighting against pathogenic microorganisms for more than one century. However, not all bacteria are unambiguous enemies for humans. Many species are vital - they ensure proper digestion and even help the immune system defend itself against other microorganisms.

    Microbes include globular, rod-shaped, and coiled bacteria, but viruses and prions usually stand out.

    Different microorganisms perform different functions: some help to decompose organic waste, protect human skin, produce vitamins, regulate hormones, suppress the reproduction of pathogenic microorganisms and are also responsible for a huge number of important processes. Other microbes, on the other hand, pollute water, affect the concentration of toxins in food, and are carriers of diseases.

    Microbes dangerous to humans

    Harmful microorganisms can infect people with deadly infections. A hundred years ago, when antibiotics were discovered, mankind seriously believed that all infectious diseases would soon be completely defeated. However, the bacteria mutated and adapted to the effects of the drugs.

    Thanks to the ability to exchange genetic information, there are already a number of microorganisms that are completely resistant to antibiotic therapy. The widespread use of antibiotics also adds fuel to the fire: not only are they prescribed even in the most innocuous cases, drugs are still being fed uncontrollably to livestock that are slaughtered, and therefore to human food.

    The most dangerous germs

    Diseases caused by the most dangerous bacteria can most often be cured if detected early. But in advanced cases, everything usually ends in death.

    The list of deadly microorganisms looks like this:

    And although a vaccine against it has long been invented, damage to the nervous system of those who are late with treatment can be fatal. Despite modern therapeutic methods, on average one in four patients dies.

    The work of the human immune system has not yet been 100% studied, so it is not clear why some people may not even know that they are carriers of typhoid fever (one of the most dangerous forms of Salmonella), and the lives of others who have become infected through feces or urine almost immediately breaks off.

    The microbe causes bacterial meningitis, a serious disease that affects the lining of the spinal cord and brain. It can cause complications such as: heart attack, thrombosis of arteries and veins, cerebral edema, deafness, septic shock, cerebral hernia, and so on. If treatment is not started on time, the probability of death will be 50%.

    What's the most dangerous microbe in the world?

    It is difficult to pinpoint which microorganism is the most harmful in the world. However, it is imperative to mention group A streptococcus.

    Group A includes very dangerous bacteria that, when entering the body, destroy red blood cells, therefore, cause serious complications.

    With good immunity, microorganisms die on their own, without external influences. But if the immune system is weakened, streptococcus causes various infectious disorders: from sore throat to necrotizing fasciitis (a third of all those infected with the "disease that eats the flesh" die, regardless of treatment). It is especially scary when this bacterium enters an open wound.

    Dangerous germs

    The parasite, called Plasmodium malaria, causes malaria in humans, which kills about two million lives each year. Residents of third world countries are most susceptible to infection with this bacterium.

    The carriers of the infection are female mosquitoes of the genus Anopheles (malaria mosquitoes). Once in the human body, plasmodium infects the liver, then enters the bloodstream, infecting red blood cells, which leads to anemia and malfunction of many organs. Coma and death occur without proper treatment.