Results for “pathogen”

pathogen

Any agent causing disease or infection, especially a bacterium, virus, or other microorganism.

secondary pathogen

Pathogenic infection developing as the result of initial infection by some other pathogen.

Aeromonas

A genus of rod-shaped, gram-negative bacteria found in fresh and salt water, soil, and sewage. Various species affect fishes while others are pathogenic to amphibians, reptiles, and higher animals including humans.

Bacillus

Genus of Gram-positive, mostly rod-shaped, bacteria including both free-living and pathogenic species.

bacteria

Large group of prokaryotic microorganisms representing one of the three domains of living organisms. Present in the majority of Earth's habitats as well as organic matter and the bodies of live animals. Most are harmless, some beneficial and others pathogenic.

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quarantine

Period of isolation, often enforced post-import or purchase of new fish(es) in aquaria, in order to prevent transmission of pathogens or parasites.

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saprolegnia

Genus of aquatic fungi, some species of which attack fishes. Normally a secondary pathogen attacking previously damaged tissue and causing cellular necrosis alongside other epidermal damage. Generally visible as a whitish or greyish filamentous fungus and thus commonly referred to as cotton-wool disease.