costiasis

9.9

A disease of freshwater fish that infects their skin and can kill them

noun
/kɒsˈtiːəsɪs/

Specialized

: costiasis

Fish infected with costiasis often show lesions and excessive mucus on their skin.

Examples

Prompt treatment is essential to prevent costiasis from spreading in an aquarium.
The outbreak of costiasis devastated the population of goldfish in the pond.
The fish died from costiasis.
Many species of fish are affected by costiasis.
Fish infected with costiasis often show lesions and excessive mucus on their skin.
The outbreak of costiasis devastated the population of goldfish in the pond.
Prompt treatment is essential to prevent costiasis from spreading in an aquarium.

Surface Forms

costiasis singular

costiases plural

Morphology

costiasis = Costia (opaque) = costia + iasis

The term is a technical disease name formed from the parasite name plus a medical suffix and is not derivable by an average B1 learner.

Etymology

Costiasis comes from the parasite name Costia and the medical ending -iasis, which means 'disease'. So costiasis is the disease caused by the tiny parasite Costia that attacks the skin of freshwater fish.