Germs

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Germs (/'dʒɜːrmz/)

Germs are microscopic organisms that can cause disease. They are found virtually everywhere - in air, soil, and water. There are four major types of germs: bacteria, viruses, fungi, and protozoa.

Etymology

The term "germ" comes from the Latin word "germen", which means "sprout" or "bud". It was first used in English in the mid-19th century to refer to a microorganism that causes disease.

Types of Germs

  • Bacteria (/'bækˈtɪəriə/): These are single-celled organisms that can live in a variety of environments, including extreme heat and cold. Some bacteria are beneficial to humans, while others can cause diseases such as strep throat or food poisoning.
  • Viruses (/'vaɪrəsɛz/): Viruses are even smaller than bacteria and require a living host to multiply and survive. They cause diseases ranging from the common cold to more serious illnesses like HIV/AIDS.
  • Fungi (/'fʌŋɡaɪ/): Fungi are multi-celled organisms that love warm, damp environments. They can cause skin conditions like athlete's foot or more serious infections, especially in people with weakened immune systems.
  • Protozoa (/'proʊtəˈzoʊə/): Protozoa are single-celled organisms that thrive in moist environments and can cause diseases like malaria.

Related Terms

  • Pathogen (/'pæθədʒən/): A pathogen is a bacterium, virus, or other microorganism that can cause disease.
  • Infection (/ɪnˈfɛkʃən/): An infection occurs when germs enter the body, multiply, and cause illness.
  • Disease (/dɪˈziːz/): A disease is a particular abnormal condition that negatively affects the structure or function of all or part of an organism.
  • Immune System (/ɪˈmjuːn ˈsɪstəm/): The immune system is a complex network of cells, tissues, and organs that work together to defend the body against attacks by "foreign" invaders.

External links

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