Olson P D, Littlewood D T J, Griffiths D, Kennedy C R, Arme C
Department of Zoology, The National History Museum, Cromwell Road, London, UK.
J Helminthol. 2002 Jun;76(2):171-4. doi: 10.1079/JOH2001101.
LIGULA (Cestoda: Pseudophyllidea) infections in gudgeon (Gobio gobio) and roach (Rutilus rutilus) differ markedly in the pathology that is observed in the host, particularly with respect to a tissue response and the extent of inhibition of gonadal development. The entire internal transcribed spacer (ITS) region (ITS-1, 5.8S and ITS-2) and the large subunit domains D1-D3 were sequenced and compared in parasites from these fish from Lough Neagh, Northern Ireland, together with a single specimen from minnow (Phoxinus phoxinus) from Wales. Sufficient differences were observed between parasites from R. rutilus and G. gobio to support the suggestion that they may represent different strains/species. In contrast, Ligula from P. phoxinus closely resembled those from R. rutilus. Ligula infections in G. gobio were recorded prior to the introduction of R. rutilus. The co-existence of separate strains or species of Ligula in Lough Neagh probably resulted from the introduction of R. rutilus to these waters, correlated with an increase in the number of great crested grebes (Podiceps cristatus).
麦穗鱼（鲤科：麦穗鱼属）和拟鲤（鲤科：拟鲤属）感染舌状绦虫（绦虫纲：假叶目）后，宿主所表现出的病理学特征差异显著，尤其是在组织反应和性腺发育受抑制程度方面。对来自北爱尔兰内伊湖的这些鱼类体内的寄生虫，以及来自威尔士的一条麦穗鱼（鲤科：麦穗鱼属）体内的单个寄生虫标本，进行了整个内部转录间隔区（ITS）区域（ITS - 1、5.8S和ITS - 2）和大亚基结构域D1 - D3的测序及比较。在拟鲤和麦穗鱼体内的寄生虫之间观察到了足够多的差异，以支持它们可能代表不同菌株/物种的推测。相比之下，麦穗鱼体内的舌状绦虫与拟鲤体内的非常相似。在拟鲤引入之前就已记录到麦穗鱼感染舌状绦虫。内伊湖存在不同菌株或物种的舌状绦虫，可能是由于拟鲤被引入这些水域，这与凤头鸊鷉（鸊鷉科：凤头鸊鷉属）数量增加有关。
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