Bacterial Fin / Tail Rot / Pseudomoniasis
A. Cause: Pseudomonas spp.
B. Characteristics of pathogens:
- Bacteria belong to gram negative and non-spore bacteria. The bacteria are aerobic, with a size of 3 µm x 0.5 µm, motile, producing fluorescent pigments, and bacteria breeding in soil and water;
- Pseudomoniasis is a bacterial disease that often occurs in all ages and types of fish, both freshwater and seawater;
- Pseudomonas is a dangerous disease agent, especially in freshwater fish and can result in high mortality because the disease is contagious quickly if the water conditions permit;
- The spread of pseudomoniasis is through direct contact with fish affected by the disease or with a polluted environment;
- Attack of this disease can occur if the fish is stressed or weak due to hunger, food is not suitable, cold, or water conditions are not good.
C. Clinical Symptoms:
- Fish become weak, movements become slow, fish breathe gasping on the surface of the water;
- Fish gills are pale and the color of the body turns dark black;
- there are red spots on the outside of the fish's body and damage to the fins, gills and skin;
- Excessive mucus on the surface of the fish's body, then bleeding;
- On the fin and tail fall (rot);
- bleeding occurs, the fish's stomach becomes bloated or known as dropsy.
- Isolation and identification of bacteria through bio-chemical tests.
- Cultivation facilities are disinfected before and during fish rearing;
- Carrying out immunostimulants (for example adding vitamin C to feed) routinely during maintenance;
- The occurrence of stress in fish needs to be avoided (physical, chemical, biological);
- Water quality needs to be repaired as a whole, especially reducing the levels of dissolved organic matter and / or increasing the frequency of replacing old water replaced with new water;
- Fish health and the environment need to be managed in an integrated manner (fish, environment and pathogens);
- Reduce feeding and the amount of fish in the pond;
- Fish soaked in a solution of PK (Potassium Permanganate) 20 mg / liter for 30 minutes.