Both Vibrio viridis and Vibrio flavus are harmful, but Vibrio viridis is more harmful. The main route of infection of Vibrio is oral transmission, followed by body surface trauma and gills entering aquatic animals. In fact, many aquatic animals eat food with Vibrio, such as Nereis. In the maternal stage of shrimp, if it is fed with nereis, it is easy to be infected with Vibrio. There are vibrios in ascaris, so when feeding ascaris to aquatic animals, we must control vibrios.

1. Which is harmful, Vibrio viridis or Vibrio flavus?

1, vibrio viridis and vibrio flavus are all harmful, but vibrio viridis is more harmful. The main route of infection of Vibrio is oral transmission, followed by body surface trauma and gills entering aquatic animals. To prevent green vibrio and yellow vibrio, you can sprinkle limewater all over the pond, which is a good way to deal with excessive vibrio. When the number of vibrios in the water environment exceeds the theoretical threshold, but the total number of heterotrophic bacteria in the water is more than 30 times of the number of vibrios, it is still safe for aquatic animals, but it is also necessary to sprinkle a variety of beneficial bacteria such as bdellovibrio and Clostridium butyricum regularly.

2. Many aquatic animals may carry Vibrio viridis and Vibrio flavus in their food. Take shrimp as an example. In the maternal stage of shrimp, if it is fed with nereis, it is easy to be infected with Vibrio. Therefore, it is suggested that microbial agents should be used to control the number of vibrios in the mother shrimp pond and wash the eggs at the same time, which can improve the survival rate of the later hatched larvae.

3. If a large number of worms are used to feed shrimp larvae, vibrio must be controlled at this time. At this stage, we must use the correct chemical methods to control it, otherwise it may affect the development of intestinal cells of shrimp larvae, resulting in a large area of shrimp? Jejunum empty stomach? Symptoms of.

2. What effect does Vibrio viridis have on fish?

1. Vibrio viridis can cause vibriosis in fish, which is the most common bacterial disease in marine fish. The common symptom of vibriosis is skin ulcer on fish. At the initial stage of infection, the body color will fade in pieces, and the fish will lose appetite and swim slowly on the water. When the infection is moderate, punctate bleeding will appear on the fin root and trunk.

2. During the first 30-40 days, special attention should be paid to the development and transformation of fish liver and pancreas. If the liver is successfully transformed and the liver function is complete, the fish's immunity will be good and it is not easy to be infected with Vibrio. Even if there is a small amount of Vibrio in the pool water, the fish will not necessarily get sick.

3. When the fish is found to have the initial symptoms of Vibrio infection, such as deep spots on the body, it indicates that the drugs of the disease will begin to deteriorate. At this time, it is necessary to spread em bacteria in time to protect the liver and intestines, kill Vibrio in hepatopancreas and intestines, and avoid further infection.