Corrêa Lincoln Lima, Ceccarelli Paulo Sérgio, Tavares-Dias Marcos
Universidade Federal do Oeste do Pará – UFOPA., Av. Mendonça Furtado, Nº 2946, Fátima, CEP 68040-470, Santarém, Pará, Brasil
PS Ceccarelli and Cia Lta. Rua Gregorio Pedroso de Lima, Nº 73, Jardim Limoeiro, CEP 13641-051, Pirassununga, estado de São Paulo, Brasil
Ann Parasitol. 2019;65(4):417–421. doi: 10.17420/ap6504.229.
The ciliate Ichthyophthirius multifiliis is an important pathogen of freshwater fish that occurs in both temperate and tropical regions around the world. The purpose of present study was to report an outbreak of I. multifiliis in Steindachneridium parahybae from the Paraiba do Sul River in state of São Paulo (Brazil). The fins, tegument and gills of S. parahybae were examined for the presence of I. multifiliis, and blood parameters (Red Blood Cell, thrombocytes and leukocytes) were evaluated. All the examined fish (100%) were parasitized with I. multifiliis and the mean infection intensity was 15.5 parasites per fish. All the fish died 72 hours as a consequence of ichthyophthiriasis with alterations to the tegument coloration and open opercula. Red Blood Cell counts and hemoglobin concentration were low, indicating an anemic process.
纤毛虫多子小瓜虫是淡水鱼的一种重要病原体，在世界各地的温带和热带地区均有发生。本研究的目的是报告在巴西圣保罗州帕拉伊巴杜苏尔河的帕拉伊巴斯坦达氏脂鲤身上爆发的多子小瓜虫疫情。对帕拉伊巴斯坦达氏脂鲤的鳍、体表和鳃进行了检查，以确定是否存在多子小瓜虫，并评估了血液参数（红细胞、血小板和白细胞）。所有检查的鱼（100%）都被多子小瓜虫寄生，平均感染强度为每条鱼15.5个寄生虫。由于小瓜虫病，所有的鱼在72小时内死亡，体表颜色发生变化，鳃盖张开。红细胞计数和血红蛋白浓度较低，表明存在贫血过程。
