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  2. Microorganism - Wikipedia

    en.wikipedia.org/wiki/Microorganism

    Koch found that he could transmit anthrax from one animal to another by taking a small sample of blood from the infected animal and injecting it into a healthy one, and this caused the healthy animal to become sick. He also found that he could grow the bacteria in a nutrient broth, then inject it into a healthy animal, and cause illness.

  3. Pathogen - Wikipedia

    en.wikipedia.org/wiki/Pathogen

    Plants can play host to a wide range of pathogen types, including viruses, bacteria, fungi, nematodes, and even other plants. [35] Notable plant viruses include the papaya ringspot virus , which has caused millions of dollars of damage to farmers in Hawaii and Southeast Asia, [ 36 ] and the tobacco mosaic virus which caused scientist Martinus ...

  4. Bacterial taxonomy - Wikipedia

    en.wikipedia.org/wiki/Bacterial_taxonomy

    Many species (the specific epithet) are named after the place they are present or found (e.g. Thiospirillum jenense). Their names are created by forming an adjective by joining the locality's name with the ending -ensis (m. or f.) or ense (n.) in agreement with the gender of the genus name, unless a classical Latin adjective exists for the place.

  5. Bacteria - Wikipedia

    en.wikipedia.org/wiki/Bacteria

    Bacteria also live in mutualistic, commensal and parasitic relationships with plants and animals. Most bacteria have not been characterised and there are many species that cannot be grown in the laboratory. The study of bacteria is known as bacteriology, a branch of microbiology.

  6. Microbial ecology - Wikipedia

    en.wikipedia.org/wiki/Microbial_ecology

    A 2006 study of pathogenic bacteria in hospitals found that their ability to survive varied by the type, with some surviving for only a few days while others survived for months. [70] The lifespan of microbes in the home varies similarly. Generally bacteria and viruses require a wet environment with a humidity of over 10 percent. [71]

  7. Germ theory of disease - Wikipedia

    en.wikipedia.org/wiki/Germ_theory_of_disease

    A representation by Robert Seymour of the cholera epidemic depicts the spread of the disease in the form of poisonous air.. The miasma theory was the predominant theory of disease transmission before the germ theory took hold towards the end of the 19th century; it is no longer accepted as a correct explanation for disease by the scientific community.

  8. Discovery of disease-causing pathogens - Wikipedia

    en.wikipedia.org/wiki/Discovery_of_disease...

    Factors which have been identified as impeding the identification of pathogens include the following: 1. Lack of animal models: Experimental infection in animals has been used as a criterion to demonstrate a disease-causing ability, but for some pathogens (such as Vibrio cholerae, which causes disease only in humans), animal models do not exist.

  9. Protozoa - Wikipedia

    en.wikipedia.org/wiki/Protozoa

    When first introduced by Georg Goldfuss, in 1818, the taxon Protozoa was erected as a class within the Animalia, [3] with the word 'protozoa' meaning "first animals", because they often possess animal-like behaviours, such as motility and predation, and lack a cell wall, as found in plants and many algae. [4] [5] [6]