Molecular detection of piroplasms in ixodid ticks infesting cattle and sheep in western Oromia, Ethiopia
Molecular detection of piroplasms in ixodid ticks infesting cattle and sheep in western Oromia, Ethiopia
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DOI：
10.1007/s11250-013-0442-z
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发表时间：
2014-01-01
影响因子：
1.7
通讯作者：
Cassini, Rudi
中科院分区：
文献类型：
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作者：
Kumsa, Bersissa;Signorini, Manuela;Cassini, Rudi
在埃塞俄比亚，蜱虫和蜱传疾病分布广泛，造成重大经济损失。几项研究调查了感染反刍动物的蜱的流行率和物种组成;然而，关于蜱传病原体的数据仍然很少。在2010年10月至2011年4月的研究期间，从埃塞俄比亚奥罗米亚西部巴科区的267头牛和45只羊中共采集了1，246只成年蜱和264只蜱虫。研究显示228/267（85.4%）头牛和35/45（77.8%）头羊感染了蜱虫成虫。总体而言，共鉴定出属于3个属（钝头蜱属、扇头蜱属和透明蜱属）的8种蜱，其中，钝头蜱（n = 577）、外翻扇头蜱（n = 290）、脱色扇头蜱（n = 287）和杂色钝头蜱（n = 85）是较常见的蜱种。A. cohaerens和R. evertsi evertsi羊被注意到。仅对扇头蜱属（Rhipicephalus）的两个物种的成年蜱进行的Piroplastin的分子检测。evertsi evertsi和R.脱色），显示总体患病率为4%（8/202）牛/瑟氏/东方泰勒虫、0.5%（1/202）牛泰勒虫和2%（4/202）绵羊泰勒虫。该研究表明，蜱虫感染流行率在该地区的牛和羊中相当高，但蜱虫负担强度较低，轻度致病性梨形虫种的循环中等。
In Ethiopia, ticks and tick-borne diseases are widely distributed and contribute to important economic losses. Several studies investigated the prevalence and species composition of ticks infesting ruminants; however, data on tick-borne pathogens are still scarce. During the study period from October 2010 to April 2011, a total of 1,246 adult ticks and 264 nymphs were collected from 267 cattle and 45 sheep in Bako District, western Oromia, Ethiopia. The study showed infestation of 228/267 (85.4 %) cattle and 35/45 (77.8 %) sheep with adult ticks. Overall, eight tick species, belonging to three genera (Amblyomma, Rhipicephalus, Hyalomma), were identified and Amblyomma cohaerens (n = 577), Rhipicephalus evertsi evertsi (n = 290), Rhipicephalus (Boophilus) decoloratus (n = 287), and Amblyomma variegatum (n = 85) were the more prevalent species. A statistically significant host preference in A. cohaerens for cattle and R. evertsi evertsi for sheep was noticed. Molecular detection of piroplasms, performed only for adult ticks of two species of the genus Rhipicephalus (R. evertsi evertsi and R. decoloratus), revealed an overall prevalence of 4 % (8/202) Theileria buffeli/sergenti/orientalis, 0.5 % (1/202) Theileria velifera, and 2 % (4/202) Theileria ovis. The study showed that tick infestation prevalence is considerably high in both cattle and sheep of the area, but with a low intensity of tick burden and a moderate circulation of mildly pathogenic piroplasm species.