Ollerenshaw C B, Graham E G, Smith L P
Vet Rec. 1978 Nov 18;103(21):461-5. doi: 10.1136/vr.103.21.461.
An empirical method for forecasting the incidence of parasitic gastroenteritis in sheep in England and Wales is described. The level of disease in lambs in late summer depends on the date soil moisture returns to field capacity (the autumn return date) in the previous year together with rainfall from May to July in the current year. The importance of a late autumn return date and winter weather in relation to disease in stock at other times of the year is also discussed.
本文描述了一种预测英格兰和威尔士绵羊寄生性肠胃炎发病率的经验方法。夏末羔羊的发病水平取决于前一年土壤湿度恢复到田间持水量的日期（秋季恢复日期）以及当年5月至7月的降雨量。文中还讨论了秋季恢复日期较晚以及冬季天气对一年中其他时间牲畜疾病的影响。
