Med. Weter. 81 (1), 48-50, 2025
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| LESZEK GUZ, KRZYSZTOF PUK, WOJCIECH ŁOPUSZYŃSKI, ELŻBIETA OLSZEWSKA, ANNA PASTUSZKA |
| Cutaneous iridophoroma and bacterial infection in a male Siamese fighting fish (Betta splendens Regan, 1910) |
| A Siamese fighting fish (Betta splendens) showed a whitish, well-demarcated mass on various sites on the body and on the head. Based on histopathological examination, a multifocal iridophoroma was diagnosed in the fish. On H&E-stained slides the iridophores contained fine to coarse golden-brown intracytoplasmic pigment granules, which exhibited white-blue birefringence with polarized light. Additionally, Gram-negative bacteria (Aeromonas hydrophila and Aeromonas veronii) were found in the diseased fish. The present report adds to the sparse literature describing iridophoromas in fish with bacterial infection, spontaneously. |
| Key words: iridophoroma, fish, bacteria, infection |