Moore J, Bell D H
J Parasitol. 1983 Apr;69(2):387-90.
Our field study did not support anecdotal claims alleging pathogenicity on the part of P. cylindraceus in starlings. Within-clutch analysis of nestling starling weights (n = 25) over time showed that P. cylindraceus had no effect on position in clutch relative to siblings. Parasitized nestlings tended to weigh more than control siblings. Within-sex analysis of wild adult starling weight (n = 103) showed no difference between animals with acanthocephalans and uninfected animals and weight was not related to intensity of infection. Host response to the proboscis was limited to immediately-surrounding tissue (90 microns). Other observations made in this study included the following: (1) no evidence for deleterious intraspecific interaction among adult P. cylindraceus in starlings; (2) no apparent interspecific interactions between P. cylindraceus and (unidentified) cestode species in starlings; and (3) copulatory caps on male P. cylindraceus may be a response to environmental deterioration in dead hosts.
我们的实地研究并不支持那些声称圆柱状绦虫对椋鸟具有致病性的传闻说法。对25只雏鸟随着时间推移进行的窝内分析表明，圆柱状绦虫对雏鸟在窝内相对于兄弟姐妹的位置没有影响。被寄生的雏鸟往往比作为对照的兄弟姐妹体重更重。对103只野生成年椋鸟体重进行的性别内分析表明，感染棘头虫的动物与未感染的动物之间没有差异，且体重与感染强度无关。宿主对吻突的反应仅限于紧邻的组织（90微米）。本研究中的其他观察结果包括：（1）没有证据表明椋鸟体内成年圆柱状绦虫之间存在有害的种内相互作用；（2）圆柱状绦虫与椋鸟体内（未鉴定的）绦虫物种之间没有明显的种间相互作用；（3）雄性圆柱状绦虫上的交配帽可能是对死宿主体内环境恶化的一种反应。
