Ali Abid, Khan Munsif Ali, Zahid Hafsa, Yaseen Pir Muhammad, Qayash Khan Muhammad, Nawab Javed, Ur Rehman Zia, Ateeq Muhammad, Khan Sardar, Ibrahim Mohammad
Department of Zoology, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa, Pakistan.
Department of Environmental Sciences, Abdul Wali Khan University Mardan, Khyber Pakhtunkhwa, Pakistan.
Front Physiol. 2019 Jul 16;10:793. doi: 10.3389/fphys.2019.00793. eCollection 2019.
Although ticks prevalent in various agro-systems of Pakistan are associated with economic losses, information is still missing about the tick's diversity, hosts they infest, seasonal dynamics and molecular phylogeny of in Khyber Pakhtunkhwa (KP) Pakistan. This study for the first time enlisted ticks infesting diverse hosts including humans in various regions of KP. A total of 8,641 ticks were collected across the northern, southern and central regions of KP and were morpho-taxonomically categorized into six genera comprising 17 species, ( = 3,584, 42%), ( = 2,253, 27%) ( = 1,342, 16%), ( = 586, 7%) ( = 161, 2%), ( = 142, 2%), ( = 132, 2%), ( = 123, 1.4%), ( = 110, 1.3%), ( = 34, 0.4%), and ( = 31, 0.4%). Ticks infesting wild animals included , , and , while ticks collected from humans included , , and . The overall prevalence of ticks infesting domestic animals was 69.4% (536/772). Among animal hosts, cattle were found highly infested (87.2%, 157/180) followed by buffalos (79%, 91/114), domestic fowls (74.7%, 112/150), goats (68.3%, 82/120), dogs (66.7%, 32/48), horses (61.3%, 49/80), and sheep (16.3%, 13/80). Analysis revealed that the tick burden significantly differed among domestic animals and was found to be high in cattle, followed by buffalos, goats, sheep, domestic fowl, dogs, and horses. Seasonal patterns of ticks distribution showed highest prevalance in July, August, and September due to the prevailing high temperature and humidity during these months. The phylogenetic analysis of cattle tick based on partial mitochondrial cytochrome oxidase subunit I (COX1), 16S ribosomal RNA (16S rRNA) and internal transcribed spacer 2 (ITS2) sequences, revealed that prevalent in this region belongs to clade C which include ticks originating from Bangladesh, Malaysia, and India. Further large scale studies across the country are necessary to explore the molecular and cross breeding aspects at the geographical overlapping of various tick species and their associated pathogens to facilitate designing control strategies as well as awareness against tick infestation in the region.
尽管在巴基斯坦不同农业系统中普遍存在的蜱虫会造成经济损失,但关于巴基斯坦开伯尔-普赫图赫瓦省(KP)蜱虫的多样性、它们寄生的宿主、季节动态以及分子系统发育的信息仍然缺失。本研究首次登记了在KP省不同地区寄生于包括人类在内的各种宿主的蜱虫。在KP省的北部、南部和中部地区共采集了8641只蜱虫,并根据形态分类学将其分为6个属,包括17个物种,即璃眼蜱属(= 3584只,占42%)、血蜱属(= 2253只,占27%)、硬蜱属(= 1342只,占16%)、扇头蜱属(= 586只,占7%)、牛蜱属(= 161只,占2%)、革蜱属(= 142只,占2%)、钝缘蜱属(= 132只,占2%)、残缘璃眼蜱(= 123只,占1.4%)、微小牛蜱(= 110只,占1.3%)、长角血蜱(= 34只,占0.4%),以及亚洲璃眼蜱(= 31只,占0.4%)。寄生于野生动物的蜱虫包括璃眼蜱属、血蜱属和硬蜱属,而从人类身上采集到的蜱虫包括扇头蜱属、牛蜱属和革蜱属。寄生在家畜身上的蜱虫总体患病率为69.4%(536/772)。在动物宿主中,发现牛的感染率很高(87.2%,157/180),其次是水牛(79%,91/114)、家禽(74.7%,112/150)、山羊(68.3%,82/120)、狗(66.7%,32/48)、马(61.3%,49/80)和绵羊(16.3%,13/80)。分析表明,家畜身上的蜱虫负担在不同家畜之间存在显著差异,发现牛身上的蜱虫负担最高,其次是水牛、山羊、绵羊、家禽、狗和马。蜱虫分布的季节模式显示,由于这几个月普遍高温高湿,7月、8月和9月的患病率最高。基于部分线粒体细胞色素氧化酶亚基I(COX1)、16S核糖体RNA(16S rRNA)和内部转录间隔区2(ITS2)序列对牛蜱进行的系统发育分析表明,该地区普遍存在的牛蜱属于C分支,其中包括来自孟加拉国、马来西亚和印度的蜱虫。有必要在全国范围内开展进一步的大规模研究,以探索不同蜱虫物种及其相关病原体在地理重叠区域的分子和杂交方面,以便制定控制策略并提高该地区对蜱虫感染的认识。