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, 16:41, 6 September 2011
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<FlashCard questions="2">
|q1=What is the cause of these lesions, which resemble molten candlewax, on the dorsal fin of this koi?
|a1=
Carp pox, caused by infection with Herpesvirus cyprini, also called cyprinid herpesvirus 1 (CHV1).
These lesions are often classified as neoplasia but are basically an epidermal hyperplasia.
|l1=
|q2=How can this disease be controlled?
|a2=
The disease is often seasonal and usually affects only a few fish in the pond.
Lesions develop in low water temperatures (winter/spring) and regress when water temperatures increase.
Treatment is seldom required because the disease is rarely fatal and is usually self-limiting. Lesions may recur the following year.
|l2=
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