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Compilation of 29 years of postmortem examinations identifies major shifts in equine parasite prevalence from 2000 onwards.
International Journal for Parasitology ( IF 3.7 ) Pub Date : 2020-01-23 , DOI: 10.1016/j.ijpara.2019.11.004
G Sallé 1 , J Guillot 2 , J Tapprest 3 , N Foucher 3 , C Sevin 3 , C Laugier 3
Affiliation  

Horses are infected by a wide range of parasite species that form complex communities. Parasite control imposes significant constraints on parasite communities whose monitoring remains, however, difficult to track through time. Postmortem examination is a reliable method to quantify parasite communities. Here, we compiled 1,673 necropsy reports accumulated over 29 years, in the reference necropsy centre from Normandy (France). The burden of non-strongylid species was quantified and the presence of strongylid species was noted. Details of horse deworming history and the cause of death were registered. Building on these data, we investigated the temporal trend in non-strongylid epidemiology and we determined the contribution of parasites to the deaths of horses throughout the study period. Data analyses revealed the seasonal variations of non-strongylid parasite abundance and reduced worm burden in race horses. Beyond these observations, we found a shift in the species responsible for fatal parasitic infection from the year 2000 onward, whereby fatal cyathostominosis and Parascaris spp. infection have replaced cases of death caused by Strongylus vulgaris and tapeworms. A concomitant break in the temporal trend of parasite species prevalence was also found within a 10 year window (1998-2007) that has seen the rise of Parascaris spp. and the decline of both Gasterophilus spp. and tapeworms. A few cases of parasite persistence following deworming were identified, which all occurred after 2000. Altogether, these findings provide insights into major shifts in non-strongylid parasite prevalence and abundance over the last 29 years. They also underscore the critical importance of Parascaris spp. in young equids.

中文翻译:

汇编了29年的验尸报告,发现自2000年以来马寄生虫患病率发生了重大变化。

马被形成复杂群落的多种寄生虫感染。寄生虫控制对寄生虫群落施加了很大的限制,但是其监测仍然难以及时追踪。验尸是量化寄生虫群落的可靠方法。在这里,我们在法国诺曼底的参考尸检中心编辑了29年来累积的1,673份尸检报告。定量非类圆虫种类的负担,并指出存在类圆虫。记录了马驱虫病史和死亡原因的详细信息。在这些数据的基础上,我们调查了非虫类流行病学的时间趋势,并确定了整个研究期间寄生虫对马死亡的影响。数据分析揭示了赛马中非拟卵虫寄生虫数量的季节性变化和蠕虫负担的减少。除了这些观察结果之外,我们还发现从2000年开始,导致致命性寄生虫感染的物种发生了变化,即致命的连翘菌和寄生虫。感染取代了由寻常圆线虫和and虫引起的死亡病例。在十年内(1998-2007年)发现了寄生虫种类的增加,同时发现了寄生虫物种流行的时间趋势。和Gasterophilus spp的下降。和tape虫。确认了驱虫后发生的几例寄生虫持久性病例,这些病例都发生在2000年之后。总的来说,这些发现为过去29年非虫类寄生虫的流行和丰度的重大变化提供了见识。他们还强调了Parascaris spp的至关重要性。在年轻的马匹中。
更新日期:2020-01-23
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