Araújo-Silva Sérgio Leandro, de Castro Maria Alcina Martins, Mendes Ricardo Evandro, Pelisser Giovana, da Rocha Vanessa Martins, Ferrarezi José Victor Safadi, Ozório Renata Ávila, Tsuzuki Mônica Yumi
Biologist, DSc., Laboratório de Peixes e Ornamentais Marinhos (LAPOM), Departamento de Aquicultura, Centro de Ciências Agrárias, Universidade Federal de Santa Catarina (UFSC), Florianópolis, SC, Brazil.
Veterinarian, DSc., Departamento de Aquicultura, UFSC, Florianópolis, SC, Brazil.
Braz J Vet Med. 2024 Aug 15;46:e003624. doi: 10.29374/2527-2179.bjvm003624. eCollection 2024.
Enlargement of the thyroid gland is referred to as goiter. In captive fish, goiter may be associated with iodine deficiency in water or diet, exposure to goitrogenic factors such as a high environmental nitrate concentration or water treatment with ozone. This report describes the occurrence of goiter in a marine ornamental fish raised in a research laboratory, the Brazilian basslet From 2016 to 2023, we observed progressively growing tumour-like masses in the pharyngeal cavity and along the gill arches of approximately 20 adult individuals. This abnormal growth impaired the ingestion of food and caused dyspnoea, leading the animals to death within a few months after the first appearance of the mass. The samples were submitted to histological analyses, which revealed moderate to severe, diffuse, hypertrophy and hyperplasia of thyroid follicular cells with most lacking colloids. This is the first report of goiter in the Brazilian basslet. Although it is not clear why this condition develops in this species, we recommend keeping nitrate levels to a minimum and monitoring water iodine concentrations regularly until future studies investigate the possible causes and adequate treatment for this species.
甲状腺肿大被称为甲状腺肿。在圈养鱼类中，甲状腺肿可能与水中或饮食中的碘缺乏、接触致甲状腺肿因素（如高环境硝酸盐浓度或用臭氧进行水处理）有关。本报告描述了在一个研究实验室饲养的一种海洋观赏鱼——巴西小鲈中甲状腺肿的发生情况。从2016年到2023年，我们在大约20只成年个体的咽腔和沿鳃弓观察到逐渐生长的肿瘤样肿块。这种异常生长损害了食物摄取并导致呼吸困难，使动物在肿块首次出现后的几个月内死亡。样本进行了组织学分析，结果显示甲状腺滤泡细胞中度至重度、弥漫性肥大和增生，大多数缺乏胶体。这是关于巴西小鲈甲状腺肿的首次报告。虽然尚不清楚该物种为何会出现这种情况，但我们建议将硝酸盐水平保持在最低限度，并定期监测水中碘浓度，直到未来的研究调查该物种可能的病因和适当的治疗方法。
