Pinto Hudson A, Mati Vitor L T, Melo Alan L
Laboratório de Taxonomia e Biologia de Invertebrados, Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, P.O. Box 486, 30123970 Belo Horizonte, MG, Brazil.
ScientificWorldJournal. 2014;2014:807492. doi: 10.1155/2014/807492. Epub 2014 Nov 19.
Fingerlings of Oreochromis niloticus collected in an artificial urban lake from Belo Horizonte, Minas Gerais, Brazil, were evaluated for natural infection with trematodes. Morphological taxonomic identification of four fluke species was performed in O. niloticus examined, and the total prevalence of metacercariae was 60.7% (37/61). Centrocestus formosanus, a heterophyid found in the gills, was the species with the highest prevalence and mean intensity of infection (31.1% and 3.42 (1-42), resp.), followed by the diplostomid Austrodiplostomum compactum (29.5% and 1.27 (1-2)) recovered from the eyes. Metacercariae of Drepanocephalus sp. and Ribeiroia sp., both found in the oral cavity of the fish, were verified at low prevalences (8.2% and 1.6%, resp.) and intensities of infection (only one metacercaria of each of these species per fish). These species of trematodes are reported for the first time in O. niloticus from South America. The potential of occurrence of these parasites in tilapia farming and the control strategies are briefly discussed.
对从巴西米纳斯吉拉斯州贝洛奥里藏特市一个人工城市湖泊采集的尼罗罗非鱼幼鱼进行了吸虫自然感染评估。在所检查的尼罗罗非鱼中对四种吸虫进行了形态分类鉴定，囊蚴的总感染率为60.7%（37/61）。在鳃中发现的异形吸虫福尔摩沙棘口吸虫是感染率和平均感染强度最高的物种（分别为31.1%和3.42（1 - 42）），其次是从眼睛中检出的双口吸虫紧凑澳双口吸虫（29.5%和1.27（1 - 2））。在鱼口腔中发现的Drepanocephalus sp.和Ribeiroia sp.的囊蚴感染率较低（分别为8.2%和1.6%），且感染强度也低（每条鱼每种囊蚴仅一个）。这些吸虫种类首次在南美洲的尼罗罗非鱼中被报道。简要讨论了这些寄生虫在罗非鱼养殖中出现的可能性及控制策略。
