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How to raise koi, oral filariasis-parasite-koi disease and control-brocade carp-view

Published: 2024-11-22 Author: mysheen
Last Updated: 2024/11/22, Oral filariasis is one of the common parasitic diseases of koi, which easily occurs in small fish tanks or small fish ponds with dirty water. After suffering from this disease, koi often sleeps at the bottom of the tank, and the serious body will attach a layer of white or grayish blue mucus, so it is also called white.

Oral filariasis is one of the common parasitic diseases of koi, which is easy to occur in small fish tanks or small fish ponds with dirty water. After suffering from this disease, koi often fall asleep at the bottom of the tank, and the serious body will attach a layer of white or grayish blue mucus, so it is also known as Baiyun disease. The occurrence of this disease should be treated with caution, which may cause a large number of deaths of fish. How to raise brocade carp, oral filariasis is one of the problems that need to be overcome.

Oral filariasis belongs to the phylum of fleshfoot flagellates of protozoa, of which the most common is floating filariasis. The body is oval, the centrosome is about 0.006 mm long and 0.004 mm wide, has 2 or 4 flagella, can rotate and swim, and there is a round nucleus in the body.

When the oral filariasis is fixed in the tissue, the body of the worm is pear-shaped, and the flagellum disappears to form a flat fixed disk attached to the tissue, which can wobble up and down, left and right, struggling and trembling.

The oral filariasis mainly lives in the water temperature of 20 ℃. Once it reaches 12 ℃, it can reproduce in large numbers, and it is the easiest to reproduce when the PH value is 5-6 and the temperature is 24 ℃. The oral filariasis mainly depends on the cell debris of the host for survival, and can be divided directly during reproduction. By the method of longitudinal dichotomy, it can directly infect and transfer the host without the need for an intermediate host. The water temperature is most active at 24 ℃, and when the water is slightly acidic, it is easy to reproduce in large numbers. It can produce a generation in a few hours. When the environment does not adapt, it can form resistant cysts and attach to the fish or the bottom of the pond to wait for the opportunity. In koi culture, oral filariasis mainly occurs from late autumn to spring. If the conditions are suitable, the disease of oral filariasis develops very rapidly, and a large number of young fish will die in 3-5 days. Big fish after overwintering. Due to lack of feed, it is also easy to cause oral filariasis and cause the death of koi.

For more questions about koi, please consult the Koi Forum.

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