Ornamental Fish Q&A 12
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| Question | Answer | Article | |
| Describe the lesion. | The photograph shows the gross appearance of the typical ‘fin rot’ lesion. This is part of a syndrome referred to as ‘cold-water disease’ as it is seen most commonly at temperatures of 4–10°C (39–50°F). The lesion shows erosion and loss of the distal section of the fin with swelling and necrosis at the advancing edge of the infection. As the disease organism spreads, the base of the tail (caudal peduncle) may become affected. |
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| What is the most probable disease organism involved? | The most commonly isolated organism is Cytophaga psychrophila, although other flexibacteria as well as Aeromonas and Pseudomonas are sometimes involved. |
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