What are the treatment methods for fish hemorrhagic disease?

[Causes] The factors causing goldfish to suffer from hemorrhagic disease are relatively complex, generally triggered by viral, bacterial and environmental factors:

1. Viruses, bacteria (generally considered to be Bacillus monas) and parasites invade the fish body, causing damage to the whole body or part of the fish.

2. Water quality. Whether using tap water @#@233@#@, or lake water or well water to raise fish, it must be left to stand or exposed to the sun for 2-3 days before use. If used directly without treatment, at best it will cause congestion of the fins and scales, and at worst it will kill the goldfish.

[Symptoms] Congestion, bleeding, ulceration and shedding of scales on the fins all over the body (more severe at the base) and between the scales or locally; in severe cases there is bleeding in the mouth, eyes and internal organs, and the sick fish floats listlessly or sinks to the bottom and swims lazily; in mild cases appetite decreases, and in severe cases it refuses to eat, the body color becomes dull, it becomes emaciated, secretions increase, and it dies from concurrent bacterial water mold and septicemia.

[Season of onset] It can occur year-round, and is especially common from June to October.

[Prevention and treatment methods]

(1) In addition to paying attention to the prevention of the above causative factors, check whether there are parasites at the bleeding sites, and remove them if present. At the same time, apply red mercurochrome to the affected areas, then place the fish in a small basin to rinse briefly before returning it to the original pond (tank) to rest, once a day until cured.

(2) Place the sick fish in a 10-20 mg/L solution of furacilin or furazolidone, or in 2%-3% salt water, and soak for 10-15 minutes, then rinse and put it into the pond (tank), once every other day.

(3) In severe cases, add 1 million units of kanamycin or 80,000-160,000 units of gentamicin to 10 kg of water, and give the sick fish a water bath to rest for 2-3 hours, or at most half a day, then transfer it to new water for rearing. Once a day, generally 2-3 times will cure it.