Richards D T, Lewis J W
School of Biological Sciences, Royal Holloway, University of London, Egham, Surrey, TW20 OEX, UK.
J Helminthol. 2001 Jun;75(2):157-64.
The role of the red fox Vulpes vulpes in the dissemination of eggs of Toxocara canis into the environment is considered with reference to female worm fecundity and egg output in the faeces of infected foxes collected from four localities in southern England. A significant positive correlation was found between female worm size and the number of eggs in the uterus but there was no significant relationship between T. canis worm numbers and egg output in fox faeces. Reliable estimates of worm burdens in foxes could not, therefore, be determined from faecal egg counts alone. The highest mean egg output of 2145.0 epg recorded from adult foxes indicated that fox cubs are not necessarily the main sources of environmental contamination with T. canis eggs. Saturated magnesium sulphate was found to be a more effective flotation solution than zinc sulphate and sodium chloride for recovering eggs from fox faecal samples.
结合从英格兰南部四个地点收集的感染狐狸粪便中雌虫的繁殖力和产蛋量，探讨了赤狐（Vulpes vulpes）在将犬弓首蛔虫卵传播到环境中的作用。发现雌虫大小与子宫内虫卵数量之间存在显著正相关，但犬弓首蛔虫数量与狐狸粪便中的产蛋量之间没有显著关系。因此，仅根据粪便中的虫卵计数无法确定狐狸体内虫负荷的可靠估计值。成年狐狸记录的最高平均产蛋量为2145.0个虫卵/克，这表明狐狸幼崽不一定是犬弓首蛔虫卵环境污染的主要来源。对于从狐狸粪便样本中回收虫卵，发现饱和硫酸镁是比硫酸锌和氯化钠更有效的浮选溶液。
