Infection

Infection is the invasion of a host organism's bodily tissues by disease-causing organisms, their multiplication, and the reaction of host tissues to these organisms and the toxins they produce. Infections are caused by microorganisms such as viruses, prions, bacteria, and viroids, and larger organisms like macroparasites and fungi.

Hosts can fight infections using their immune system. Mammalian hosts react to infections with an innate response, often involving inflammation, followed by an adaptive response. Pharmaceuticals can also help fight infections.

The branch of medicine that focuses on infections and pathogens is infectious disease medicine.

Read more about Infection:  Classification, Diagnostic Approach, Signs and Symptoms, Pathophysiology, Treatment and Prevention, Fossil Record

Famous quotes containing the word infection:

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    William Shakespeare (1564–1616)

    What, then, was war? No mere discord of flags
    But an infection of the common sky
    That sagged ominously upon the earth
    Robert Graves (1895–1985)

    No science is immune to the infection of politics and the corruption of power.
    Jacob Bronowski (1908–1974)