Pathogens causing aquaculture animal diseases mainly include bacteria, viruses, fungi, parasites and some algae, among which the common symptoms of fish caused by bacteria are gills, white skin, red skin, vertical scales, bacterial sepsis, bacterial enteritis, furuncles, printing diseases, etc., common bacterial diseases of crustaceans are red legs, rotten gills, blindness, crustacean ulcers, fluorescent diseases, etc., common bacterial diseases of turtles are Edward's disease, perforation disease, red neck disease, gastric ulcer hemorrhage, frog common bacterial diseases such as Edward's disease, red leg disease, Streptococcal disease, etc.
The following is a brief overview of several common bacterial diseases in fish.
Rotten gills: the pathogen is columnar fibrous bacteria, mainly harmful to grass carp, blue fish, often and infectious enteritis, bleeding, red skin concurrent prevention: clear the pond thoroughly, choose excellent fish species, the disease can choose golden iodine, three yellow powder.
Red skin: the pathogen is Pseudomonas fluorescent, the main targets of infection are blue carp, grass carp, carp and tuantou bream. When preventing, pay attention to keeping the surface of the fish intact, so that bacteria cannot invade, especially in the process of pulling the net, transportation and other processes to avoid fish body injury, the onset of the disease can choose septic kang, golden iodine, three yellow powder and so on.
Vertical scales: The pathogen is initially considered to be water-based Pseudomonas punctate, which mainly endangers the fish body of hydrostatic ponds and high-density aquaculture ponds, and there is less occurrence in flow-through aquaculture ponds. Prevention: Fish body injury can be avoided during fishing and transportation, new water can be filled to stop spreading at the beginning of the disease, and the diseased fish can be treated by soaking the diseased fish in 3% salt water for 5 to 10 minutes.
Bacterial sepsis in freshwater fish: the pathogen is aeromonas hydrophilic, which has many types of harmful objects and a wide range of epidemics. An important measure for prevention is to remove too much silt at the bottom of the breeding pond, for the disease shark fin used tools need to be disinfected, sick and dead fish medicine in time and can not be thrown around, should be timely buried and treated, fish species to reduce handling, in situ breeding, before the pond can be 15mg / L potassium permanganate medicinal bath treatment, the epidemic season can be used sepsis Kang whole pool spilled.
Bacterial enteritis: the pathogen is aeromonas, aeromonas guinea pigs and intestinal punctate aeromonas, which occur all over the country, grass carp, bluefish are the most susceptible to disease, silver carp, bighead carp also occur, of which intestinal punctate gas monocles are conditional pathogenic bacteria, often exist in water bodies, when the conditions deteriorate, the fish body immunity declines can lead to disease outbreaks. Prevention is mainly based on keeping the water quality clean, strictly implementing the measures of four eliminations and four determinations, and the treatment can choose gold iodine, three yellow powder, Materia Medica, intestinal worry-free, etc.
Print: The pathogen is a subspecies of Aeromonas punctate, the main harm to breeding objects are silver carp, bighead carp, grass carp occasionally have diseases, of which the infection rate of silver carp and silver carp is as high as 80%, and the occurrence of symptoms is related to operational injury, especially for broodstock. Prevention is mainly to keep the pool water clean, regular use of disinfectants to disinfect the water body, optional use of gold iodine, septic blood kang, etc., use in strict accordance with the instructions, in the daily management of the operation of caution, try to avoid the injury of the fish body, while avoiding secondary infection of parasites.
Furuncles: the pathogen is furuncle-type punctate gas-producing monocapsular bacteria, the main harm objects are blue fish, grass carp, carp, tuantou bream, silver carp, bighead carp also occur, precautions should be paid to keeping the quality of aquaculture water clean, regular use of disinfectants to comprehensively disinfect the water body, when the disease occurs, you can choose to use gold iodine, thiosefloxacin and so on for the whole pool to sprinkle, in the daily management of prudent operation, to avoid fish injury.
Catfish intestinal sepsis: is caused by Eduardella catfish infection, spotted forktail catfish is one of the most susceptible to infection with the bacterium, prevention should be prepared at the source of the fry and before the release of seedlings, before the seedlings are turned over and then the pond is dried, tools, cage meshes, etc. are soaked in a solution diluted 300 times with strong iodine for 10 to 15 minutes, disinfecting the aquaculture water body, because the spotted forktail catfish is scaleless, so when selecting disinfectants, you should choose a disinfection agent with less irritation, strengthen management, improve water quality conditions, and reduce stress The stocking density should not be too large, and new water should be filled frequently, especially in the high temperature season to reduce the water temperature.
Vibrio disease: Vibrio common species are Vibrio eel, Vibrio parahaemolyticus, Vibrio algalolytica, Vibrio Harvey, etc., Vibrio is one of the most common bacterial groups in the ocean, can infect turbot flounder, salmon trout, catfish, eels and other fish species, Vibrio is also a typical condition pathogenic bacteria, the occurrence of its disease is often due to the deterioration of the external environment, so prevention is mainly to maintain excellent water quality, regularly remove too much silt at the bottom of the pond, and comprehensive disinfection, optional arc, daily strengthening of feeding management, the use of high-quality bait.