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Related to chronic infection: Latent infection
chron·ic in·fec·tion(kron'ik in-fek'shŭn)
Any prolonged or persistent invasion of the body by pathogens.
An infection having a protracted course.
See also: infection
1. invasion and multiplication of microorganisms in body tissues, especially that causing local cellular injury due to competitive metabolism, toxins, intracellular replication or antigen-antibody response.
2. an infectious disease.
short duration, of the order of several days.
infection by inhalation of organisms suspended in air on water droplets or dust particles.
restrained in its development by a capsule or adhesion but still containing infective material.
long duration, of the order of weeks or months.
the utilization of procedures and techniques in the surveillance, investigation and compilation of statistical data in order to reduce the spread of infection, particularly nosocomial infections.
infection transmitted between patients infected with different pathogenic microorganisms.
infection due to inhalation of respiratory pathogens suspended on liquid particles exhaled by an animal that is already infected.
infection by inhalation of pathogens that have become affixed to particles of dust.
that due to reactivation of organisms present in a dormant focus, as occurs in tuberculosis, etc.
that caused by organisms not normally present in the body but which have gained entrance from the environment.
see systemic infection (below).
the animal is infected but there are no clinical signs nor infectious agent detectable in discharges.
has a common syndrome of varying degree, depending on the site and acuteness of the lesion and the type of microorganisms present, including fever, toxemia and leukocytosis with a left shift. The specific individual signs relate to the location of the lesion and the pressure it exerts on nearby organs. See also abscess, cellulitis, phlegmon, osteomyelitis, omphalophlebitis, empyema, adenitis, metritis, mastitis, periphlebitis.
an infection is known to occur but the infectious agent cannot be demonstrated, e.g. the sheep-associated malignant catarrhal fever virus.
infection with more than one kind of organism at the same time.
pertaining to or acquired in hospital.
infection with organisms which are normally harmless but become pathogenic when the body's defense mechanisms are compromised.
one in which the infectious agent can be demonstrated in discharges of the patient.
a characteristic of some viruses, particularly herpesviruses and lentiviruses, in which there may be long-lasting or life-long latent infections, with asymptomatic periods and recurring acute episodes of clinical disease (herpesviruses) or onset of severe clinical disease (lentiviruses).
infection by pus-producing organisms.
infection by a pathogen following an infection by a pathogen of another kind.
see struvite urolith.
infection associated with no detectable signs but caused by microorganisms capable of producing easily recognizable diseases, such as mastitis or brucellosis; often detected by the production of antibody, or by delayed hypersensitivity exhibited in a skin test reaction to such antigens as tuberculoprotein.
a second infection occurs in an animal which is already experiencing an infection with another agent.
the infection is widespread throughout the body and must be assumed to be in all organs.
an acute infection occurring near the end of a disease and often causing death.
an infection capable of being transmitted from one animal to another. Called also contagious.
infection by microorganisms transmitted in water.