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An opportunistic infection is a serious infection caused by pathogens (bacteria, fungi, parasites or viruses) that under normal conditions, such as in humans with uncompromised immune systems, would cause a mild infection or no infection at all.
It has been identified as an opportunistic pathogen of both humans and plants. [81] P. aeruginosa is the type species of the genus Pseudomonas. [82] Identification of P. aeruginosa can be complicated by the fact individual isolates often lack motility. The colony morphology itself also displays several varieties.
Opportunistic infection – infection caused by pathogens that take advantage of a weakened or compromised immune system. Risk of infection – Likelihood of contracting an infection, which is influenced by a host's inherent susceptibility (age, immune status, genetics) or external exposures (behavior, environment).
A comprehensive comparison of distribution of opportunistic pathogens and stress-tolerant fungi in the fungal tree of life showed that polyextremotolerance and opportunistic pathogenicity consistently appear in the same fungal orders and that the co-occurrence of opportunism and extremotolerance (e.g. osmotolerance and psychrotolerance) is ...
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 .
It is primarily a pathogen for domestic animals, [3] [4] but has been known to affect humans as well. [5] S. pseudintermedius is an opportunistic pathogen that secretes immune-modulating virulence factors, has many adhesion factors, and the potential to create biofilms, all of which help to determine the pathogenicity of the bacterium.
L. ivanovii is a pathogen of mammals, specifically ruminants, and rarely causes listeriosis in humans. [7] ... Some Listeria species are opportunistic pathogens: ...
Primary pathogens often cause primary infection and often cause secondary infection. Usually, opportunistic infections are viewed as secondary infections (because immunodeficiency or injury was the predisposing factor). [60]