Nocardia is a pathogen that causes a large number of deaths in California perch, the incidence is getting higher and higher, and there is currently no good drug control, which makes breeding friends very headache.
Hazards of Nocardia bacteria
Nocardia, also known as sarcoidosis, can form a large number of white nodules visible to the naked eye in various organs of internal organs, especially the kidneys and spleen, and form abscesses in the subepidermal fat and muscle of the fish body. Nocardia is a conditional pathogenic bacterium that is ubiquitous, but is more susceptible to disease after fish are infected with parasites.
Judgment of Nocardia
The symptoms of infection with this disease are mainly the appearance of white nodules in the gills, liver, kidneys and other internal organs, but it is not the only criterion for judging, like some aerophilic bacteria, Vibrio Harveys, Pseudomonas malodorum, etc. may cause the appearance of white nodules in the internal organs. Clinically, according to the epidemic characteristics of this disease, by observing the symptoms of the body surface, gill filament, abdominal cavity and internal organs can make a simple judgment, strictly speaking, it is necessary to judge through the isolation and identification of bacteria, and the right medicine can achieve good treatment effect.
Prevention and control methods of Nocardia
At present, the sensitive drugs commonly used by Nocardia are florfenicol, doxycycline hydrochloride and erythromycin, which can be combined with bile acid, tri-yellow powder, astragalus polysaccharide, VC and other health care products during treatment to enhance the physique of fish and play an auxiliary therapeutic role.
It is necessary to start from the fish's own physique, the physique is good, and the disease resistance is also strong!
Enhance the physique of the fish body. Add bile acid + happiness 100 to the California perch feed, the liver is the immune organ of the fish body, and the liver is in good condition and its own immune function is improved.
The addition of bile acids can promote the secretion of bile by the liver, enhance the detoxification and detoxification function of the liver, so that the toxins in the body can be eliminated from the body with the bile, restore and enhance the function of the liver, and enhance the immunity of the fish body.
When california bass faces disease and stress, the body produces a large number of free radicals. If the California perch's own antioxidant system cannot remove free radicals in time, it will cause serious oxidative damage to the California perch; therefore, adding Happiness 100 to the feed can remove the oxidative damage of free radicals to the California perch, improve the anti-stress ability and anti-viral ability!
The article is transferred from the "California Perch Frontier" WeChat public platform.