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Incubation Period

INCUBATION PERIOD

The time that elapses between the invasion of a susceptible host by an infectious agent and the onset of symptoms of the disease caused by that agent is called the incubation period. The term is also used to describe the comparable period in the life cycle of parasitic pathogens that have an intermediate host. In such cases the phase is sometimes referred to as an extrinsic incubation period; while this time period in a human host is called an intrinsic incubation period. The length of the incubation period varies greatly; it could be a few hours in the case of staphylococcal food poisoning, many months for a disease such as rabies, or even years for leprosy. The latent period in the mosquito intermediate host of the malaria parasite is temperature-dependent; some pathologens (including malaria parasites) can survive during the prolonged hibernation of the insect vector during the cool dry season.

John M. Last

(see also: Latent Period )

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incubate

in·cu·bate / ˈinkyəˌbāt; ˈing-/ • v. [tr.] (of a bird) sit on (eggs) in order to keep them warm and bring them to hatching. ∎  (esp. in a laboratory) keep (eggs, cells, bacteria, embryos, etc.) at a suitable temperature so that they develop: the samples were incubated at 80°C for three minutes. ∎  (be incubating something) have an infectious disease developing inside one before symptoms appear: the possibility that she was incubating early syphilis. ∎  [intr.] develop slowly without outward or perceptible signs: unfortunately the BSE bug incubates for around three years.

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incubation

incubation
1. The process of maintaining the fertilized eggs of birds and of some reptiles and egg-laying mammals at the optimum temperature for the successful development of the embryos. A period of incubation follows the laying of the eggs and precedes their hatching.

2. The process of maintaining a culture of bacteria or other microorganisms at the optimum temperature for growth of the culture.

3. The phase in the development of an infectious disease between initial infection and the appearance of the first symptoms.

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incubation

incubation In biology, process of maintaining stable, warm conditions to ensure that eggs develop and hatch. Incubation is carried out naturally by birds, and by some reptiles. It is accomplished by sitting on the eggs, by making use of volcanic or solar heat or the warmth of decaying vegetation, or by covering the eggs with an insulating layer of soil or sand. Examples of average incubation times in days include 18 for pigeons, 21 for chickens and 30 for ducks and geese.

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incubation

in·cu·ba·tion / ˌinkyəˈbāshən; ˌing-/ • n. the process of incubating eggs, cells, bacteria, a disease, etc.: the chick hatches after a month's incubation. DERIVATIVES: in·cu·ba·tive / ˈinkyəˌbātiv; ˈing-/ adj. in·cu·ba·to·ry / inˈkyoōbəˌtôrē; ing-/ adj.

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incubation period

incubation period In medicine, time-lag between becoming infected with a disease and the appearance of the first symptoms. In many infectious diseases, the incubation period is quite short – anything from a few hours to a few days – although it may also be very variable. The human immunodeficiency virus (HIV) can remain in infected cells for up to 10 years before causing Acquired Immune Deficiency Syndrome (AIDS).

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incubation

incubation (in-kew-bay-shŏn) n.
1. the process of development of an egg or a culture of bacteria.

2. the care of a premature baby in an incubator.

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incubate

incubate XVIII. f. pp. stem of L. incubāre, f. IN-1 + cubāre lie; see CUBICLE, -ATE3.
So incubation XVII. — L. incubator XIX.

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incubation period

incubation period (latent period) n. the interval between exposure to an infection and the appearance of the first symptoms.

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incubate

incubate •jailbait • rebate • whitebait • probate •stereobate • approbate • incubate •stylobate • exacerbate • masturbate •mandate • candidate • validate •consolidate • intimidate • dilapidate •cuspidate • fluoridate • elucidate •antedate • liquidate • chordate •update • inundate • fecundate •accommodate • caliphate • phosphate •Margate • Irangate • tailgate •lychgate • Lydgate •delegate, relegate •Billingsgate • obligate • fumigate •abnegate • aggregate • segregate •irrigate • congregate • castigate •investigate •litigate, mitigate •instigate •circumnavigate, navigate •promulgate • elongate • toll gate •Newgate • sluice gate • conjugate •subjugate • floodgate • vulgate •objurgate • expurgate • propagate •arrogate • abrogate •derogate, interrogate •corrugate • subrogate • watergate

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