Changes

The parasite attacks the epidermis of the skin and fins, the gill filaments and the cornea and can kill fish by interfering with their gill function and osmoregulation.  

The parasite attacks the epidermis of the skin and fins, the gill filaments and the cornea and can kill fish by interfering with their gill function and osmoregulation.  

Outbreaks occur when conditions are favourable for '''rapid multiplication''' of the parasite. '''Temperature''' is a very important factor, and as it rises to 25°c parasite activity increases and the life cycle is completed in a shorter time than at lower temperatures.  

Outbreaks occur when conditions are favourable for '''rapid multiplication''' of the parasite. '''Temperature''' is a very important factor, and as it rises to 25°C parasite activity increases and the life cycle is completed in a shorter time than at lower temperatures.  

'''Stress''' can also bring about an outbreak in a fish population as it decreases the immune function of the host. This may include crowding, low dissolved oxygen, pollutants and moving.

'''Stress''' can also bring about an outbreak in a fish population as it decreases the immune function of the host. This may include crowding, low dissolved oxygen, pollutants and moving.

Smyth, J. (1994) '''Introduction to animal parasitology''' ''Cambridge University Press''

Smyth, J. (1994) '''Introduction to animal parasitology''' ''Cambridge University Press''

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[[Category:Miscellaneous Protozoa]]