Hayatbakhsh Mohammad Reza, Khara Hossein, Movahed Rashideh, Sayadborani Mohammad, Rohi Javad Daghigh, Ahmadnezhad Mohadesseh, Rahbar Mina, Rad Amir Sajedi
Young Researcher Club, Islamic Azad University, Lahijan Branch, P.O. Box: 1616, Tehran, Iran.
Department of Fishery and Aquaculture, Islamic Azad University-Lahijan Branch, Faculty of Natural Resource, P.O. Box: 1616, Lahijan, Iran.
J Parasit Dis. 2014 Dec;38(4):383-8. doi: 10.1007/s12639-013-0256-y. Epub 2013 Feb 15.
A parasitological investigation was done on 175 specimens. Infections of A. brama orientalis were analyzed according to the age and sex. The fish also were examined for evaluation changes of haematological parameters in relation to parasitic infection. Four parasites were found, including-Caryophyllaeus laticeps and Ligula intestinalis (Cestoda), Diplostomum spathaceum (Platyhelminthes) and Trichodina sp. (Ciliophora). Among identified parasites maximum prevalence and mean intensity were related to Ligula intestinalis and Caryophyllaeus laticeps respectively. The values of prevalence and mean intensity showed significant differences among ages. Our results revealed prevalence, mean intensity and abundance had not significant difference between males and females. Parasite infection provoked reduction (P < 0.05) in haematocrit, mean cell volume and lymphocyte. On the other hand, significant increase (P < 0.05) in white blood cell (WBC), mean cell haemoglobin concentration and neutrophil in blood of infected fish was observed. Significant differences were detected for the WBC, lymphocyte and neutrophil (infected versus uninfected by Trichodina sp., Diplostomum spathaceum and Caryophyllaeus laticeps). In addition to WBC and lymphocytes, significant change was observed for the haemoglobin (Hb) (infected versus uninfected by Ligula intestinalis).
对175个样本进行了寄生虫学调查。根据年龄和性别分析了东方真鲈的感染情况。还对这些鱼进行了检查，以评估与寄生虫感染相关的血液学参数变化。发现了四种寄生虫，包括宽叶腹槽绦虫和舌状绦虫（绦虫纲）、匙形双腔吸虫（扁形动物门）和车轮虫属（纤毛虫纲）。在已鉴定的寄生虫中，最高感染率和平均感染强度分别与舌状绦虫和宽叶腹槽绦虫有关。感染率和平均感染强度的值在不同年龄之间存在显著差异。我们的结果显示，雄性和雌性在感染率、平均感染强度和丰度方面没有显著差异。寄生虫感染导致红细胞压积、平均细胞体积和淋巴细胞减少（P<0.05）。另一方面，观察到感染鱼血液中的白细胞（WBC）、平均细胞血红蛋白浓度和中性粒细胞显著增加（P<0.05）。在白细胞、淋巴细胞和中性粒细胞方面检测到显著差异（感染车轮虫属、匙形双腔吸虫和宽叶腹槽绦虫与未感染相比）。除了白细胞和淋巴细胞外，在血红蛋白（Hb）方面也观察到显著变化（感染舌状绦虫与未感染相比）。
