在人类与野生动物的交界处,对野生和家养食肉动物及其蜱虫中媒介传播病原体进行分子检测。
Molecular detection of vector-borne pathogens in wild and domestic carnivores and their ticks at the human-wildlife interface.
作者信息
Millán Javier, Proboste Tatiana, Fernández de Mera Isabel G, Chirife Andrea D, de la Fuente José, Altet Laura
机构信息
Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, República 252, Santiago, Chile.
Facultad de Ciencias Silvoagropecuarias, Universidad Mayor, Santiago, Chile.
出版信息
Ticks Tick Borne Dis. 2016 Mar;7(2):284-90. doi: 10.1016/j.ttbdis.2015.11.003. Epub 2015 Nov 18.
Urbanization of natural areas is considered one of the causes of the current apparent emergence of infectious diseases. Carnivores are among the species that adapt well to urban and periurban environments, facilitating cross-species disease transmission with domestic dogs and cats, and potentially with their owners. The prevalence of vector-borne pathogens (VBP) of zoonotic and veterinary interest was studied in sympatric wild and domestic carnivores into Barcelona Metropolitan Area (NE Spain). Blood or spleen samples from 130 animals, including 34 common genets (Genetta genetta), 12 red foxes (Vulpes vulpes), 10 stone martens (Martes foina), three Eurasian badgers (Meles meles), 34 free-roaming domestic cats and 37 dogs with outdoor access, were collected either in protected or adjacent residential areas. A total of 309 ticks (chiefly Rhipicephalus turanicus) were collected on these animals. The samples were analyzed with a battery of PCR assays targeting the DNA of Rickettsia spp., Anaplasmataceae, Coxiella burnetii, Bartonella spp., and Piroplasmida, and the amplicons were sequenced. The fox showed the highest prevalence (58%) and diversity of VBP (four pathogens), whereas none of the dogs were infected. Bartonella spp. (including B. clarridgeiae, B. henselae, and B. rochalimae) was the most prevalent pathogen. Infection of wild carnivores with Ehrlichia canis, C. burnetii, Theileria annae and Babesia vogeli was also confirmed, with some cases of coinfection observed. The presence of DNA of T. annae and B. vogeli was also confirmed in tick pools from four species of wild carnivores, supporting their role in piroplasmid life-cycle. By the sequencing of several target genes, DNA of Rickettsia massiliae was confirmed in 17 pools of Rh. turanicus, Rh. sanguineous, and Rh. pusillus from five different species, and Rickettsia conorii in one pool of Rh. sanguineous from a dog. None of the hosts from which these ticks were collected was infected by Rickettsia. Although carnivores may not be reservoir hosts for zoonotic Rickettsia, they can have an important role as mechanical dispersers of infected ticks.
自然区域的城市化被认为是当前传染病明显出现的原因之一。食肉动物是最能适应城市和城郊环境的物种之一,这促进了与家犬和家猫以及潜在地与它们的主人之间的跨物种疾病传播。我们对西班牙东北部巴塞罗那大都市区同域分布的野生和家养食肉动物体内人畜共患和兽医关注的媒介传播病原体(VBP)的流行情况进行了研究。采集了130只动物的血液或脾脏样本,包括34只普通灵猫(Genetta genetta)、12只赤狐(Vulpes vulpes)、10只石貂(Martes foina)、3只欧亚獾(Meles meles)、34只自由放养的家猫和37只有户外活动空间的狗,这些动物均采自保护区或相邻的居民区。在这些动物身上总共采集到309只蜱(主要是图兰扇头蜱Rhipicephalus turanicus)。使用一系列针对立克次氏体属、无形体科、伯氏考克斯氏体、巴尔通体属和梨形虫目的DNA的PCR检测方法对样本进行分析,并对扩增子进行测序。狐狸显示出最高的VBP流行率(58%)和多样性(四种病原体),而没有一只狗被感染。巴尔通体属(包括B. clarridgeiae、B. henselae和B. rochalimae)是最普遍的病原体。犬埃立克体、伯氏考克斯氏体、泰勒虫和犬巴贝斯虫对野生食肉动物的感染也得到了证实,并且观察到了一些混合感染的病例。在四种野生食肉动物的蜱混合样本中也证实了泰勒虫和犬巴贝斯虫DNA的存在,这支持了它们在梨形虫生命周期中的作用。通过对几个靶基因进行测序,在来自五个不同物种的17个图兰扇头蜱、血红扇头蜱和微小扇头蜱混合样本中证实了马赛立克次氏体的DNA,在一只狗的一个血红扇头蜱混合样本中证实了康氏立克次氏体的DNA。采集到这些蜱的宿主均未被立克次氏体感染。尽管食肉动物可能不是人畜共患立克次氏体的储存宿主,但它们作为感染蜱的机械传播者可能发挥重要作用。