Van Aken D, De Bont J, Vercruysse J, Dorny P
Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Sri Lanka.
Trop Anim Health Prod. 1990 Nov;22(4):231-8. doi: 10.1007/BF02240405.
Faecal egg counts were used to study patterns of nematode infestation of adult female goats and their offspring according to season, pregnancy and lactation or age on a goat farm (n = 2000) in north-western Sri Lanka. Average rainfall in the area is 825 mm and temperature is between 23 and 33 degrees C throughout the year. The only nematode species present on the farm were Haemonchus contortus and Oesophagostomum columbianum. In adult females the faecal egg output was not influenced by season and no significant periparturient rise was observed. In kids the egg counts rose from the third month of age onwards and reached the same levels as the adults by the fourth month. Post-mortem studies on a neighbouring farm indicated that hypobiosis was not present.
在斯里兰卡西北部的一个山羊养殖场（n = 2000），采用粪便虫卵计数法，根据季节、怀孕和泌乳情况或年龄，研究成年母山羊及其后代的线虫感染模式。该地区年平均降雨量为825毫米，全年气温在23至33摄氏度之间。养殖场中仅存在捻转血矛线虫和哥伦比亚食道口线虫。成年母羊的粪便虫卵排出量不受季节影响，未观察到明显的围产期上升。幼羊的虫卵计数从第三个月龄开始上升，到第四个月龄时达到与成年羊相同的水平。对邻近养殖场的尸检研究表明不存在休眠状态。
