Parasitology Department, Noguchi Memorial Institute for Medical Research, College of Health Sciences, University of Ghana, Accra, Ghana.
Department of Theoretical and Applied Biology, College of Science, KNUST, Kumasi, Ghana.
Med Vet Entomol. 2023 Dec;37(4):878-882. doi: 10.1111/mve.12688. Epub 2023 Aug 17.
Ticks are efficient vectors for transmitting pathogens that negatively affect livestock production and pose a risk to public health. In this study, Babesia and Theileria species were identified in ticks collected from cattle, sheep and goats from the Kassena-Nankana Districts of Ghana between February and December 2020. A total of 1550 ticks were collected, morphologically identified, pooled and screened for pathogens using primers that amplify a 560 bp fragment of the ssrRNA gene and Sanger sequencing. Amblyomma variegatum (62.98%) was the predominant tick species. From the 491 tick pools screened, 12/15 (2.44%) positive pools were successfully sequenced. The pathogen DNA identified were Theileria ovis in eight (15.38%) pools of Rhipicephalus evertsi evertsi, Theileria velifera in two (0.78%) pools of A. variegatum and Babesia occultans and Babesia sp. Xinjiang in one (1.72%) pool each of Hyalomma truncatum. It was further observed that T. ovis occurred in ticks collected from only sheep (p < 0.001) which were females (p = 0.023) and < =1 year old (p = 0.040). This study reports the first identification of these pathogens in ticks within Kassena-Nankana. With the constant trade of livestock, there is a need for effective tick control measures to prevent infection spread.
蜱是传播对畜牧业生产产生负面影响的病原体的有效载体,也对公共卫生构成威胁。本研究于 2020 年 2 月至 12 月期间,从加纳卡塞纳-南卡纳地区的牛、绵羊和山羊身上采集了蜱,并对其进行了鉴定。共采集了 1550 只蜱,对其进行了形态学鉴定,然后将其混合并使用扩增 ssrRNA 基因 560bp 片段的引物进行了病原体筛选,并进行 Sanger 测序。变色革蜱(62.98%)是主要的蜱种。在所筛选的 491 个蜱混合样本中,成功测序了 12/15(2.44%)阳性样本。鉴定出的病原体 DNA 为 8 个(15.38%)瑞氏血蜱 Rhipicephalus evertsi evertsi 蜱混合样本中存在绵羊泰勒虫(Theileria ovis),2 个(0.78%)变色革蜱(A. variegatum)混合样本中存在泰勒虫(Theileria velifera),1 个(1.72%)钝缘蜱(Hyalomma truncatum)混合样本中存在边缘无浆体(Babesia occultans)和新疆巴贝斯虫(Babesia sp. Xinjiang)。进一步观察到,T. ovis 仅在绵羊(p < 0.001)中采集的蜱中出现,这些蜱是雌性(p = 0.023)和< = 1 岁(p = 0.040)。本研究首次在卡塞纳-南卡纳的蜱中鉴定出这些病原体。随着牲畜的不断交易,需要采取有效的蜱控制措施来防止感染传播。