Lepidortosis is an intractable infectious disease that affects all types of aquarium fish of various ages. The causative agents of lepidortosis can enter the indoor pond from natural reservoirs or from infected aquariums. The disease is slow and, if untreated, ends with the death of the fish. The disease occurs when the fish organism is affected by the bacteria Pseudomonas fluorescens and Aeromonas punctata. Lepidortosis is also called infectious erosion of scales. The bacteria causing lepidortosis are widespread in rivers and lakes. They can be brought into an aquarium with plants, water and soil. Also, the cause of an outbreak among aquarium fish can be sick freshwater fish from natural reservoirs or other aquariums that have not passed mandatory quarantine. To prevent the disease, you can not use soil, plants or water without prior treatment. New fish must be quarantined. Equipment from other aquariums must undergo mandatory sanitation to prevent the spread of infection.
Symptoms of the disease
The main symptoms of the disease are raising the scales. In the early stages, this occurs in small areas of the body of the fish, in advanced cases, the scales rises on the entire surface. The behavior of the fish does not change. Irrigation of scales is observed as a result of the formation in the skin of fish of small pustules filled with serous fluid. Changing the skin leads to a violation of the gas exchange of the body. This is especially dangerous for larvae and fry of fish, in which skin breathing is used along with breathing through the gill apparatus. Changes in the skin with lepidortosis lead to irreversible metabolic disturbances and fish death. Fish that are kept in good conditions and get proper nutrition are quite resistant to the disease. Usually sick fish with weak immunity contained in overpopulated aquariums in poor conditions.
For successful treatment, diagnosis is of great importance, since similar symptoms are observed even with some infectious diseases, for example, with ichthyosporidosis or mycobacteriosis. Therefore, the diagnosis is made on the basis of laboratory studies of the contents of pustules and adjacent tissues. It is possible to treat lepidortosis only in the initial stages, when the scales rise on small areas of the skin. Fishes with an extensive raising of scales are recommended to be destroyed. For treatment, antibiotic bicilin-5 and biomycin are used. The drug bicilin-5 is used at the rate of 500 thousand units per 100 liters. It is necessary to bring it into the general aquarium in the evenings. The course of treatment is up to 7 days. Biomycin treatment is carried out from 1 to 4 weeks. The drug is applied 1 time per week. For 100 liters of water you need 1.5 g of medicine. Aquarium soil should be disinfected by boiling, the inventory is washed with 5% hydrochloric acid solution. Aquarium plants are subject to disinfection with a solution of bicilin-5.