Aydenizöz-Ozkayhan M, Yağci B B, Erat S
Kirikkale University, Faculty of Veterinary Medicine, Department of Parasitology, Turkey.
Vet Parasitol. 2008 Mar 25;152(1-2):94-100. doi: 10.1016/j.vetpar.2007.12.002. Epub 2007 Dec 8.
This study was undertaken to determine the prevalence of Toxocara canis eggs on the coats of dogs (a potential etiological factor for human toxocariasis) and to see if there were mainly a dog breed and coat type effects for the presence of eggs on the coat. Hair samples were collected from the different breeds of 51 domestic pet dogs and examined for the presence of T. canis eggs. A total of 62 T. canis eggs (all viable) were found in 21.56% of the dogs. Forty-nine (79.03%) of the eggs recovered were unembryonated, 8 (12.90%) were embryonating, and 5 (8.06%) were embryonated. The maximum densities of the embryonating and embryonated eggs were 93 and 8.45 eggs per gram (epg) of hair, respectively. The number of eggs recovered was much higher than those previously reported for soil samples. Although the statistical analysis for all dogs in this study showed that there were no breed (P>0.4), coat type (P>0.8), sex (P>0.1), age group (P>0.1) and hair length (P>0.3) effects for the presence of T. canis eggs per gram of hair, the majority of dogs (82%) with T. canis eggs in their coats were breeds that had double coats with thick undercoats suggesting that the coat characteristic may play a role for providing a suitable environment for the development of T. canis eggs. Also 82% of infected dogs were under 1 year of age indicating that the age of dog is a very important risk factor. The present study indicates that direct contact with T. canis infected dogs may be a potential etiological factor for human toxocariasis.
本研究旨在确定犬弓首蛔虫卵在犬被毛上的流行情况（人类弓首蛔虫病的一个潜在病因），并观察犬的品种和被毛类型对被毛上虫卵存在情况是否有主要影响。从51只家养宠物犬的不同品种采集毛发样本，检查其中犬弓首蛔虫卵的存在情况。在21.56%的犬只中总共发现了62枚犬弓首蛔虫卵（均为活卵）。回收的虫卵中，49枚（79.03%）未胚胎化，8枚（12.90%）正在胚胎化，5枚（8.06%）已胚胎化。正在胚胎化和已胚胎化的虫卵的最大密度分别为每克毛发93枚和8.45枚（epg）。回收的虫卵数量远高于先前报道的土壤样本中的虫卵数量。尽管本研究对所有犬只的统计分析表明，每克毛发中犬弓首蛔虫卵的存在情况不存在品种（P>0.4）、被毛类型（P>0.8）、性别（P>0.1）、年龄组（P>0.1）和毛发长度（P>0.3）的影响，但被毛上有犬弓首蛔虫卵的犬只中，大多数（82%）是具有双层厚底毛的品种，这表明被毛特征可能在为犬弓首蛔虫卵的发育提供适宜环境方面发挥作用。此外，82%的感染犬年龄在1岁以下，这表明犬的年龄是一个非常重要的风险因素。本研究表明，与感染犬弓首蛔虫的犬只直接接触可能是人类弓首蛔虫病的一个潜在病因。
