Lahmar S, Kilani M, Torgerson P R
Service de Parasitologie, Ecole National de Médecine Vétérinaire, 2020 Sidi Thabet, Tunisia.
Ann Trop Med Parasitol. 2001 Jan;95(1):69-76. doi: 10.1080/00034980020035933.
The intestinal helminths infecting stray dogs were investigated in the Testour and Bouzid regions of Tunisia. Overall, 21% of the dogs necropsied were found to be infected with Echinococcus granulosus. The prevalence among the animals from Testour (27.0%) was significantly higher than that in the dogs from Bouzid (6.9%). Although the prevalence of this species in the dog populations did give a significant fit to the age-prevalence models reported earlier, the best fit was not consistent with the known biological parameters of the parasite. The frequency distribution of E. granulosus was highly aggregated, with a mean abundance of infection of 538 parasites/host and a mean intensity in infected animals of 2534 parasites/host. Several Taenia species were also found in the dogs, but none of these showed evidence of an aggregated distribution and the frequency distribution of each fitted a Poisson distribution, which is unusual for naturally acquired infections. All the other cestode species and the nematode species encountered had aggregated distributions in the dogs. As there was relatively little correlation between the worm burdens of the different parasite species in the dogs, individual dogs may not be generally susceptible or resistant to intestinal helminths of several species.
在突尼斯的泰斯图尔和布齐德地区对感染流浪狗的肠道蠕虫进行了调查。总体而言，尸检的狗中有21%被发现感染了细粒棘球绦虫。来自泰斯图尔的动物（27.0%）中的患病率显著高于来自布齐德的狗（6.9%）。虽然该物种在狗群中的患病率确实与早期报道的年龄 - 患病率模型有显著拟合，但最佳拟合并不符合该寄生虫已知的生物学参数。细粒棘球绦虫的频率分布高度聚集，平均感染丰度为538个寄生虫/宿主，感染动物的平均感染强度为2534个寄生虫/宿主。在狗中还发现了几种带绦虫属物种，但这些都没有显示出聚集分布的证据，并且每种的频率分布都符合泊松分布，这对于自然获得的感染来说是不寻常的。遇到的所有其他绦虫物种和线虫物种在狗中都有聚集分布。由于狗体内不同寄生虫物种的虫负荷之间相关性相对较小，个体狗可能通常对几种物种的肠道蠕虫不敏感或具有抗性。
