How does bacterial hurt humans?



  1. 0 Votes

    some are harmful, some are beneficial. See answers in link.

  2. 0 Votes

    Some ways bacteria can be harmful to humans:

    • Certain bacteria act as pathogens and cause tetanus, typhoid fever, pneumonia, syphilis, cholera, food-borne illness and tuberculosis.
    • Streptococcus bacteria may cause small infections like strep throat and some serious diseases like pneumonia. Certain streptococci may be fatal.
    • Bacteria that usually live harmlessly in the body may cause infections when a person’s resistance to disease is reduced in conditions such as AIDS (Acquired Immune Deficiency Syndrome).
    • Not all stomach bacteria are beneficial, some of the stomach bacteria enter the body through the mouth, and they can survive in the acidic conditions in the stomach and can cause serious diseases and can be fatal.
    • Campylobacter is a group of bacteria that can create illnesses in humans and is a common cause of food poisoning.Harmful bacteria in food cause botulism, which can cause paralysis or even death if even one millionth of the bacterium is ingested.
    • Yersinia pestis or bubonic plague, is a rod-shaped type of bacterium which is well known for its harmful nature. Bacteria-carrying fleas found on animals such as rats and mice transmit the bacteria that are believed to have caused the deaths of millions of people in human history.
  3. 0 Votes

    Bacteria are tiny, one-celled organisms that can be found almost everywhere, in the deepest oceans, in the thickest soil, and up to 90,000 feet in the atmosphere. There are many kinds of bacteria, some which cause deadly diseases and some which are helpful to man.


    Those which are harmful cause diseases in man, animals, and plants. They can cause food to spoil, even poisoning people who eat them.


    But there are a great many bacteria that man and nature use in helpful ways. For example, bacteria play an important role in making buttermilk, sauerkraut, cheese, and vinegar by causing a chemical change called fermentation. Bacteria also attack dead plants and animals, and break them down into nourishment for the soil.

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