In this ecological and physiological study of the common eider (Somateria mollissima) nesting on the coast of Eastern Murman, the species composition of the bird helminth fauna, as well as the infection quantitative parameters, were determined. The common eider small intestine proved to be infected with trematodes of the genus Microphallus; three species of cestodes, namely, Lateriporus teres (Cestoda: Dilepididae), Fimbriarioides intermedia (Cestoda: Hymenolepididae), and Microsomacanthus diorchis (Cestoda: Hymenolepididae); and one species of acanthocephalan, Polymorphus phippsi (Palaeacanthocephala: Polymorphidae). At the sites of F. intermedia and M. diorchis locations within the intestine, the protease activity was reduced while in the foci infected with acanthocephalan P. phippsi, it was, on the contrary, increased. Glycosidase activity in the intestinal mucosa was reduced as compared to the control in birds infected by the cestodes M. diorchis. Hematological indices of the infected individuals were higher than the control parameters.

中文翻译：

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来自东部摩尔曼的共同绒绒小肠（Somateria mollissima）中的蠕虫：对宿主消化活性和生理状态的影响。

在对东摩尔曼海岸的常见绒鸭（Somateria mollissima）筑巢的生态和生理研究中，确定了鸟类蠕虫动物的种类组成以及感染的定量参数。常见的绒毛小肠被证明被Microphallus属的吸虫感染。三种ces类，即Lateriporus teres（Cestoda：Dilepididae），Fimbriarioides intermedia（Cestoda：Hymenolepididae）和Microsomacanthus diorchis（Cestoda：Hymenolepididae）；还有一种棘头动物，Polymorphus phippsi（Palaeacanthocephala：Polymorphidae）。相反，在肠内中间鞭毛虫和腹泻支原体的部位，蛋白酶活性降低，而在感染棘头皮疟原虫的病灶中，蛋白酶活性升高。与对照组相比，肠粘膜粘虫中的糖苷酶活性降低了。感染者的血液学指标高于对照参数。