Question

Fin rot of fish is caused by
A. Aeroronans
B. Pseudomonas
C. Branchiomyces
D. Xenopsylla

Answer 1

Hint: In aquarium fish, fin rot is one of the most common diseases, but it is also one of the most preventable. Technically, fin rot can be caused by many different bacterial species, but the root cause is often environmental and mostly stress-related.

Complete Answer:
- They are more vulnerable to fin rot when fish are relocated, exposed to overcrowding, or combined with aggressive fish that chase them and nip at their fins. Fin rot is a condition typically caused by either the bacteria Aeromonas, Pseudomonas, or Vibrio. While relatively easy to avoid, once it is set in, fin rot can be hard to cure, particularly in the more advanced phases. Fin rot will inevitably kill the diseased fish if left untreated and can infect all other fish as well in the tank.
- The edges of the fins will discolour in the early stages of fin rot, becoming milky at the edges. This transition is always so gradual that it goes unnoticed before the fins or tail start to fray. Small parts of the fins die and start falling off as the infection spreads, leaving a ragged tip.
- Over time, as dead tissue begins to slough off the affected fins, the fins get shorter and shorter. The affected area may become red and inflamed, as more tissue is eaten away, with bloody patches appearing.
- Bad water quality and improperly-low water temperature are the most common causes of fin rot. Stress contributing to fin rot can also be caused by overcrowding the tank, feeding obsolete food, overfeeding the fish, and moving or handling.
- Several antibiotics are successful in treating fin rot, but the root cause must be treated to ensure that the disease does not return. A water adjustment and close review of the conditions of the aquarium should be included in the procedure. If food debris remains, vacuum the gravel and take precautions to prevent possible overfeeding.
- Start placing dates on your fish food, because after opening the food bag, it loses the vitamin content very quickly. It is much better than frequent, large feedings of stale foods to feed your fish fresh high-quality food in smaller amounts.

The correct Answer is option (B) Pseudomonas.

Note: Test the water's pH and temperature, and make sure it is suitable for your species of fish. Be sure that in the water there is no chlorine, ammonia, or nitrite and that the nitrate is below 40 ppm (mg/L).Until the root cause is corrected, the disease itself can normally be healed by antibiotics. It is recommended that a medication which is effective against gram-negative organisms be treated.