Flach Leonardo, Alonso Mariana B, Marinho Thaís, Van Waerebeek Koen, Van Bressem Marie-Françoise
Instituto Boto Cinza, Mangaratiba, Rio de Janeiro, CEP 23860-000, Brazil.
Dis Aquat Organ. 2019 Mar 14;133(3):175-180. doi: 10.3354/dao03343.
From November 2017 to March 2018, a cetacean morbillivirus (CeMV) outbreak caused an unprecedented mass mortality among Guiana dolphins Sotalia guianensis in Ilha Grande Bay and Sepetiba Bay, Rio de Janeiro, Brazil. Small boat surveys were conducted to document the behavior and clinical signs presented by diseased dolphins. We observed 5 abnormally behaving, disoriented Guiana dolphins on separate days, of which 1 died stranded and 2 sank. Signs of ataxia included difficulties with swimming and maintaining a course, balance and buoyancy. At least 40 other individuals were emaciated, and 10 photo-identified dolphins had miscellaneous skin lesions, some ulcerated. Labored breathing suggestive of airway obstruction was heard in several groups. These neurological, respiratory and cutaneous signs may comprise part of the clinical constellation of CeMV infection in dolphins. The combined threat of anthropogenic pressures and CeMV lethal disease is of concern for the survival of the Guiana dolphin population in Sepetiba Bay.
2017年11月至2018年3月，一种鲸类麻疹病毒（CeMV）爆发，在巴西里约热内卢的大伊瓜苏湾和塞佩蒂巴湾的圭亚那海豚（Sotalia guianensis）中造成了前所未有的大量死亡。开展了小船调查，以记录患病海豚的行为和临床症状。我们在不同日期观察到5只行为异常、迷失方向的圭亚那海豚，其中1只搁浅死亡，2只沉入水中。共济失调的症状包括游泳困难、难以保持航向、平衡和浮力。至少还有40只个体消瘦，10只经照片识别的海豚有各种皮肤损伤，有些出现溃疡。在几组海豚中都听到了提示气道阻塞的呼吸急促声。这些神经、呼吸和皮肤症状可能是海豚感染CeMV临床症状的一部分。人为压力和CeMV致命疾病的双重威胁令人担忧塞佩蒂巴湾圭亚那海豚种群的生存。
