作者在西班牙塞拉曼加省的市区和农村进行了犬弓蛔虫病流行病学调查,以确定当地影响弓蛔虫病流行的因素。共收集508份犬粪,用40％硫酸锌漂浮法检查虫卵。采集泥土样本698份,其中202份取自城市的街道、公园和游乐场所;另496份取自不同的小镇和农村,用饱和硫酸锌加5％碘化钾溶液漂浮法检查虫卵,并记录在每份样本中检获的虫卵数及其发育期。于冬季 The authors conducted an epidemiological investigation of canis ascariasis in the urban and rural areas of the province of Salamanca in Spain to determine the local factors affecting the prevalence of ascariasis. A total of 508 canine colostrums were collected and the eggs were checked by a 40% zinc sulfate floatation method. 698 soil samples were collected, of which 202 were taken from urban streets, parks and playgrounds; the other 496 were taken from different towns and villages. The eggs were examined by floatation with saturated zinc sulphate plus 5% potassium iodide solution and recorded in Number of eggs seized in each sample and their developmental period. In winter