What are parasitic intestinal diseases in fish? How to prevent and cure it?

The intestinal tract is the main digestive organ of aquatic animals, especially for stomachless fish. The intestinal tract is often the first barrier for the anti-nutritional factors and toxic and harmful substances in the bait to enter the fish body, and it is the "starting point" for the damage of the anti-nutritional factors in the diet to the related tissues and organs of fish. If fish suffer from intestinal diseases, poor treatment will affect their yield. What are the common parasitic intestinal diseases in fish? How to prevent and cure it?

1. Common parasitic intestinal diseases in fish

1. Coccidiosis

Pathogen: Eimeria.

Harm object: herring.

Symptoms: the Gill is pale, the inner wall of the intestine forms many gray-white "tumors", and the tissue around the focus fester, producing white pus.

2. Intestinal disease of paragonimus

Pathogen: paragonimus japonicus.

Harm object: herring, carp, crucian carp.

Symptoms: the diseased fish are blackened, swim slowly and float in flocks on the leeward water. Fish fry or summer flower fish can die in large numbers 3-5 days after the disease.

3. Myxosporidium enteropathy

Pathogen: Myxosporidium.

Harm object: carp, crucian carp.

Symptoms: White dot cysts are formed on the intestinal mucosa. Carp and crucian carp above two years old can also pass through the intestinal wall and appear a large number of cysts in the outer wall of the intestine.

4. Intestinal disease of Taenia sagitata

Pathogen: Taenia solium in Jiujiang.

Harm objects: grass carp, herring, silver carp and other fish species of the year.

Symptoms: sick fish increasingly thin, do not eat, the mouth is often open, the back of the foreintestine turn, there are many thin noodle-like white worms, can cause a large number of fish species death.

Second, how to prevent and cure parasitic intestinal diseases in fish?

1. Methods of coccidiosis control

Give the bait of iodine solution. Use 30 milliliters of 4% iodine for every 250 kg of herring for 4 days.

Feed the sulfur powder bait. Use 50 grams of herring for every 250 kilograms.

Use related deworming drugs.

2. Prevention and treatment of intestinal diseases of paragonimus.

Mixed culture of herring to eat the field snail in the pond (intermediate host) is the best control method.

Use related deworming drugs.

3. Prevention and treatment of myxosporidium intestinal disease.

80% dichlorvos 10ppm soaked rice bran or bran for 3 consecutive days.

Feed with 75 grams of sulphur powder for every 10, 000 fish species or every 100 kg of fish, once a day for 5-8 days.

Use related deworming drugs.

4. Prevention and treatment of intestinal disease of Taenia saginata

Feed trichlorfon bait. Mix 50 grams of 90% trichlorfon crystal with 500 grams of flour for 3-6 days. Stop eating for one day before giving the medicine.

20g of thio-dichlorophenol mixed with 5kg rice bran was used to feed 100kg fish once a day for 4 days.

Feed the pumpkin seed bait. Grind 250 grams of pumpkin seeds into powder, then mix well with 500 grams of flour and 500 grams of rice bran for 3 days.

Betel nut 200-400g powder, mixed human feed into particles, used for 100 kg fish once a day for 4 days.

Use related deworming drugs.