Rose C H, Jacobs D E
Department of Veterinary Pathology, Royal Veterinary College, University of London, United Kingdom.
Acta Vet Scand. 1990;31(3):339-45. doi: 10.1186/BF03547546.
Sources of nematode infection on the rangelands of a southern Greenlandic sheep farm were investigated as a part of a study of the epidemiology of Ostertagia and Nematodirus infections in a sub-arctic climate. Herbage larval counts were performed on samples collected from selected localities on the rangeland and post mortem worm-counts made on tracer lambs that had grazed these areas for the latter part of the summer season. Relatively high concentrations of larvae were found in good quality native grasses at sea-level and in grasses growing beneath canopies of willow-shrub at higher altitudes. In general, however, the infectivity of the vegetation was very low and the pick-up of infection by the tracer lambs was correspondingly small.
作为亚北极气候下奥斯特他线虫和细颈线虫感染流行病学研究的一部分，对格陵兰岛南部一个绵羊农场牧场的线虫感染源进行了调查。对从牧场选定地点采集的样本进行了牧草幼虫计数，并对在夏季后期放牧过这些区域的示踪羔羊进行了死后蠕虫计数。在海平面优质原生草以及高海拔柳树灌木丛冠层下生长的草中发现了相对较高浓度的幼虫。然而，总体而言，植被的感染性非常低，示踪羔羊感染的情况相应较少。
