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  2. Pathogen - Wikipedia

    en.wikipedia.org/wiki/Pathogen

    Diseases in humans that are caused by infectious agents are known as pathogenic diseases. Not all diseases are caused by pathogens, such as black lung from exposure to the pollutant coal dust , genetic disorders like sickle cell disease , and autoimmune diseases like lupus .

  3. List of infectious diseases - Wikipedia

    en.wikipedia.org/wiki/List_of_infectious_diseases

    This is a list of infectious diseases arranged by name, along with the infectious agents that cause them, the vaccines that can prevent or cure them when they exist and their current status. Some on the list are vaccine-preventable diseases .

  4. Infection - Wikipedia

    en.wikipedia.org/wiki/Infection

    An infectious disease, also known as a transmissible disease or communicable disease, is an illness resulting from an infection. Infections can be caused by a wide range of pathogens , most prominently bacteria and viruses . [ 2 ]

  5. Germ theory of disease - Wikipedia

    en.wikipedia.org/wiki/Germ_theory_of_disease

    Diseases caused by pathogens are called infectious diseases. Even when a pathogen is the principal cause of a disease, environmental and hereditary factors often influence the severity of the disease, and whether a potential host individual becomes infected when exposed to the pathogen.

  6. Pathogenic bacteria - Wikipedia

    en.wikipedia.org/wiki/Pathogenic_bacteria

    Pathogenic bacteria are bacteria that can cause disease. [1] This article focuses on the bacteria that are pathogenic to humans. Most species of bacteria are harmless and many are beneficial but others can cause infectious diseases. The number of these pathogenic species in humans is estimated to be fewer than a hundred. [2]

  7. Infections associated with diseases - Wikipedia

    en.wikipedia.org/wiki/Infections_associated_with...

    Infections associated with diseases are those infections that are associated with possible infectious etiologies that meet the requirements of Koch's postulates. Other methods of causation are described by the Bradford Hill criteria and evidence-based medicine .

  8. Human pathogen - Wikipedia

    en.wikipedia.org/wiki/Human_pathogen

    A human pathogen is a pathogen (microbe or microorganism such as a virus, bacterium, prion, or fungus) that causes disease in humans.. The human physiological defense against common pathogens (such as Pneumocystis) is mainly the responsibility of the immune system with help by some of the body's normal microbiota.

  9. Epidemic - Wikipedia

    en.wikipedia.org/wiki/Epidemic

    A zoonosis is an infectious disease of humans caused by a pathogen that can jump from a non-human host to a human. [35] Major diseases such as Ebola virus disease and salmonellosis are zoonoses. HIV was a zoonotic disease transmitted to humans in the early part of the 20th century, though it has now evolved into a separate human-only disease. [36]