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首页> 外文期刊>Parasitology >Prevalence and co-infection of Toxoplasma gondii and Neospora caninum in Apodemus sylvaticus in an area relatively free of cats
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Prevalence and co-infection of Toxoplasma gondii and Neospora caninum in Apodemus sylvaticus in an area relatively free of cats

机译：弓形虫和犬新孢子虫在相对没有猫的区域中的流行和共感染

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摘要

The protozoan parasite Toxoplasma gondii is prevalent worldwide and can infect a remarkably wide range of hosts despite felids being the only definitive host. As cats play a major role in transmission to secondary mammalian hosts, the interaction between cats and these hosts should be a major factor determining final prevalence in the secondary host. This study investigates the prevalence of T. gondii in a natural population of Apodemus sylvaticus collected from an area with low cat density (<2-5 cats/km~2). A surprisingly high prevalence of 40-78% (95% CI: 34.07%-47.79%) was observed despite this. A comparable level of prevalence was observed in a previously published study using the same approaches where a prevalence of 59% (95% CI: 50.13%-67.87%) was observed in a natural population of Mus domesticus from an area with high cat density (>500 cats/km2). Detection of infected foetuses from pregnant dams in both populations suggests that congenital transmission may enable persistence of infection in the absence of cats. The prevalences of the related parasite, Neospora caninum were found to be low in both populations (A. sylvaticus: 3.39% (95% CI: 0.12%-6.66%); M. domesticus: 3.08% (95% CI: 0.11%-6.05%)). These results suggest that cat density may have a lower than expected effect on final prevalence in these ecosystems.
机译：原生动物的弓形虫弓形虫在世界范围内很普遍，尽管猫科动物是唯一的确定性宿主，它仍然可以感染范围广泛的宿主。由于猫在传播至次级哺乳动物宿主中起主要作用，因此猫与这些宿主之间的相互作用应成为决定次级宿主最终流行程度的主要因素。本研究调查了从猫密度低的地区（<2-5猫/ km〜2）采集的姬鼠自然种群中的弓形虫流行情况。尽管如此，仍观察到令人惊讶的高患病率40-78％（95％CI：34.07％-47.79％）。在先前发表的研究中，使用相同的方法观察到了相当水平的患病率，在猫密度高的地区的家蝇的自然种群中，患病率为59％（95％CI：50.13％-67.87％）（ > 500猫/平方千米）。在两个种群中都从怀孕的水坝中检测到受感染的胎儿表明，先天性传播可以在没有猫的情况下持续感染。在这两个种群中，相关寄生虫犬新孢子虫的患病率均较低（西兰花：3.39％（95％CI：0.12％-6.66％）;家蝇（M. domesticus）：3.08％（95％CI：0.11％- 6.05％））。这些结果表明，猫的密度对这些生态系统的最终流行率可能具有低于预期的影响。

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