After a fish becomes ill, the right medicine can only be cured. However, some fishes have similar illnesses. If they cannot be distinguished correctly, they will lose the opportunity for treatment. Several kinds of ambiguous fish disease differentiation methods are introduced as follows for reference by fish farmers.
1. Hemorrhagic disease and enteritis disease Both diseases mainly harm the first-year grass fingerlings of the year. The diseased fish has an anal swelling, and the bowel congestion is bright red, but the bleeding is caused by the reovirus, which is caused by bacteria. Inflammation of the intestines is inflamed and is severely purple. The intestinal tract is opened without food, with pus and blood. Observing the body surface, the rays of the fins are eroded, the abdomen is enlarged, and yellow mucus is squeezed out of the anus.
2. Both the mildew and gill grass carp suffer from these two diseases. The diseased fish has black head and pale silk. However, fish caught in the mold was swollen and inflamed, whereas in the case of gill disease, the sputum tissue rotted and collapsed, the crestal cartilage was exposed, and even the corrugated lid formed a "skylight", and the sputum often had sludge.
3, white spot disease and print disease is the same point is the sick fish body fins evenly covered with white spots, when the fish surface appears to cover a layer of white film, water temperature at 15 °C -25 °C when the popular season. Congestive spots were visible between the white spots of the printed fish. In severe cases, the white spots were contiguous and overlapped like a layer of rice flour. The disease easily occurred in the acidic waters.
4, whitehead white mouth disease and trichoderma, cleroditis larvae they mostly occurred in the fry of the summer flowers, the disease is the white side of the fish kiss, lips are always Zhang, mouth closed closed failure. The difference is: Whitehead and whiteheads are manifested as the fish's previous skin whitening, the rostral skin is rotted due to infection, the head of trichoderma is white, the iliac crest, rays, and red cysts are visible on the body surface. There are hooked larvae in the capsule.
5. Both pan-intoxication and poisoning are the deaths of fish in a short period of time. Pans usually occur after a thunderstorm or a long and rainy morning, and poisoning occurs at any time. Pantang is suffocated due to severe oxygen deprivation in the water. Before the death, besides squid and squid, they all ran wildly on the floating surface and hit the shore. They first showed a state of dying, and then they died one after another. Poisoning is the surface of all the fish in the whole pond or pond. The whole body is buoyant, squatting, and paroxysmal collisions. Then it loses its balance and rolls back. It slowly sinks to the bottom of the water, breathing weakly and dying.
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