Myxobacterial rotten carp disease

First, the symptoms: the gills of the diseased fish rot, with some sludge. Sometimes the tip tissue of the Gill decays, resulting in incomplete edge of the Gill, and sometimes one or more parts of the Gill rot, not at the edge. The lining of the operculum is congested, sometimes broken and corroded into a slightly round transparent area, commonly known as "open skylight". Due to the destruction of Gill tissue, the diseased fish have difficulty in breathing and often swim near the water surface in the shape of a floating head. Seriously ill fish still have the phenomenon of floating head after changing clean water.

Pathogen: columnar fibromyxobacteria (Cytophagacolumnaris), synonym: fish damage myxococcus (Myxococcuspiscioco1a).

Third, harm and epidemic situation: the disease begins to spread when the water temperature of goldfish, koi and red carp is above 20 ℃. In the Yangtze River basin, the epidemic is in its peak period from spring to autumn. When the water temperature is below 15 ℃, the diseased fish decreases gradually. This disease can cause a large number of fish to die in that year, and big goldfish more than one year old often get sick, but red carp and brocade carp are less sick. This disease is a common and frequently-occurring disease of goldfish, and it is prevalent all over the country.

Fourth, prevention and control methods:

1. Small goldfish were raised sparsely in that year. Regular feeding of live food such as water fleas and Chironomus larvae plays a significant role in preventing the occurrence of the disease.

2. Wash with aqueous solution with 2% concentration of salt. Water temperature below 32 ℃, soaking for 5 minutes for 10 minutes, effective prevention and early treatment, especially Gill and body surface parasite infection.

3. Wash with furacilin or furazolidone 20ppm concentration. It is the same as the prevention and treatment of skin inflammation and congestive disease.

4. Sprinkle furacilin or furazolidone all over the pool. It is the same as the prevention and treatment of skin hair point hyperemia.

5. Sprinkle the whole pond with the concentration of bleach 1ppm, this method is suitable for outdoor large fish ponds.

6. Use rhubarb 2.5ppm~3.75ppm concentration of traditional Chinese medicine, every 0.5kg rhubarb (dry product) soak with 10kg light ammonia water (0.3%) for 12 hours, rhubarb dissolve, and the liquid and residue are sprinkled all over the pool (regardless of the ammonia content of the ammonia water, it will be regarded as 100% pure ammonia concentration). This medicine is suitable for outdoor ponds, especially for many years of use of furans, has produced drug-resistant goldfish, koi farms, rhubarb has a significant effect.