Although Koi fish often suffer from enteritis, it can be cured if they can be detected and treated in time. Koi fish are an ornamental fish. When they get sick, it will affect their appearance. Koi fish with enteritis disease often fall out of the group, darken their body color, skip meals, etc. In severe cases, they can cause other diseases and cause death. Therefore, when Koi fish have enteritis, you must pay more attention to them. 
 
When squeezing the abdomen of a koi fish, yellow-red ascites will flow out of its abdomen. There will be congestion and inflammation in some places in the intestinal wall. In the later stage of the disease of the koi fish, the entire intestine will turn red or purple, and the intestinal wall will become inelastic and full of pale yellow mucus. This enteritis disease usually occurs at a water temperature of 18 degrees Celsius and above. When the water temperature is 25 to 30 degrees Celsius, it is the highest peak area for enteritis. When the koi fish is seriously ill, the mortality rate of the koi fish It may be as high as 90% or more.
 
Usually enteritis is caused by four conditions. The first is because of indigestion. This type of enteritis usually shows a lack of interest in food, and the surface of the water will float. In severe cases, the koi fish will have no focus on the eyes, and redness and congestion will appear in the anus. The second is caused by bacteria. The cause of bacteria is that the water is not clean. Therefore, there are many bacteria in the water, so we need to change the water for the koi fish frequently. The third type is gastroenteritis caused by parasites. These parasites are small insects, which can be seen in the feces of the koi fish. At this time, the feces of the koi fish will be solid white.
 
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