Drózdz J, Demiaszkiewicz A W, Lachowicz J
Instytut Parazytologii im. W. Stefańskiego.
Wiad Parazytol. 1990;36(1-3):35-8.
In the Białowieza Forest the parasitological autopsy of large intestine of 6 bisons was made at the beginning of winter of 1987-1988, and 9 dissections were made in the latter part of both seasons. Four species of nematodes were found to occur together: Chabertia ovina, Oesophagostomum radiatum, Oe. venulosum and Trichocephalus ovis. At the end of wintering in bisons the invasion of Ch. ovina appeared in high percent of animals, but the intensity of it was low. However, the extensity and intensity of invasion of three remaining species of nematodes distinctly arose. In comparison with bisons in closed reserves, free living bisons assimilated Oe. venulosum and Ch. ovina. It is likely that the winter quarters are the source of invasion. It can be explained by the permanent accumulation of feaces with invasive forms of nematodes, and by feeding bisons on the great amount of hay, in which the invasive forms of nematodes may also occur.
1987 - 1988年冬初，在比亚沃维耶扎森林对6头野牛的大肠进行了寄生虫学解剖，在两个季节的后期又进行了9次解剖。发现有4种线虫同时存在：绵羊夏伯特线虫、辐射食道口线虫、微小食道口线虫和绵羊毛首线虫。在野牛越冬结束时，绵羊夏伯特线虫的感染在高比例动物中出现，但感染强度较低。然而，其余3种线虫的感染范围和强度明显增加。与封闭保护区内的野牛相比，自由放养的野牛感染了微小食道口线虫和绵羊夏伯特线虫。冬季栖息地很可能是感染源。这可以通过含有线虫感染性形态的粪便长期积累，以及野牛食用大量可能也有线虫感染性形态的干草来解释。
