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Ticks and Tick-borne Diseases最新文献

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Comparison and complete mitogenomes of two morphologically similar but ecologically different tick species, Ixodes arboricola and Ixodes lividus (subgenus Pholeoixodes) 两种形态相似但生态不同的蜱类——木蜱和灰蜱的比较及全有丝分裂基因组研究
IF 3.4 2区 医学 Q2 INFECTIOUS DISEASES Pub Date : 2026-01-01 DOI: 10.1016/j.ttbdis.2025.102589
Sándor Hornok , Paulina Lesiczka , Tim Warbroek , Tijs J.M. van den Bosch , Andor Pitó , Gergő Keve , Nóra Takács , Jenő Kontschán , Attila D. Sándor
Ixodes arboricola and Ixodes lividus are ornithophilic tick species. The former is typically associated with tree-hole dwelling birds, while the latter is a host-specific parasite of sand martins (Riparia riparia). These two tick species share important morphological characters that make them difficult to identify when they are collected from atypical hosts, such as birds of prey. Despite this, high resolution digital pictures have not been reported to compare I. arboricola and I. lividus, nor was their complete mitogenome reported. The aim of this study was to compensate for this lack of illustrations and sequence data. Nymphs and females of I. arboricola and I. lividus were used for morphological comparison, and one specimen of each species to generate mitogenome sequences.
The results showed that females of these two species are different in the shape of their scutum, porose areas, the length of basis capituli, palps, coxae, genital pore, anal groove and tarsus I. On the other hand, nymphs of I. arboricola and I. lividus can be distinguished according to their cervical grooves, cornuae, auricular ridges and spiracular plates. The mitochondrial genome size was 14,539 and 14,536 bp, for I. arboricola and I. lividus, respectively. The mitogenome sequences of I. arboricola and I. lividus were 91.1% identical to each other. Phylogenetic analysis of Ixodes species showed that I. arboricola and I. lividus are sister species, and cluster together with Ixodes crenulatus/canisuga under strong support.
In conclusion, results of this study confirmed that the front of the basis capituli is crucial in distinguishing Ixodes species, especially in the subgenus Pholeoixodes where these two species are phylogenetically closest related to I. canisuga. Another phylogenetically relevant morphological character is the scutal surface which is wrinkled (rugose) as a common feature of Pholeoixodes species in the clade of I. arboricola and I. lividus (including I. canisuga, I. rugicollis and I. ariadnae). Although the host ranges of I. arboricola and I. lividus do not substantially overlap, they may transmit some of the shared pathogens. Relevant data indicate that the eco-epidemiological significance of the two ornithophilic tick species studied here may in part be similar and they may play a role in the transmission of rickettsiae, borreliae and viruses of which birds act as reservoirs.
树上硬蜱和lividus硬蜱是嗜鸟蜱。前者通常与树洞栖息鸟类有关,而后者是沙马丁(Riparia Riparia)的宿主特异性寄生虫。这两种蜱具有重要的形态特征,这使得它们从非典型宿主(如猛禽)收集时难以识别。尽管如此,高分辨率的数字图像还没有报道比较树突蝽和lividus,也没有报道它们完整的有丝分裂基因组。本研究的目的是弥补插图和序列数据的不足。用树蠓和鹅毛蠓的若虫和雌虫进行形态比较,并各取一个标本进行有丝分裂基因组测序。结果表明,两种雌虫的阴囊形状、气孔面积、头基长度、掌部、髋部、生殖道孔、肛门沟和跗骨均存在差异,而雌雄虫则可根据颈沟、角、耳脊和螺旋体板进行区分。树蝗和lividus的线粒体基因组大小分别为14,539和14,536 bp。两种植物的丝分裂基因组序列同源性为91.1%。种间系统发育分析表明,arboricola和lividus是姐妹种,并在强有力的支持下与crenulatus/canisuga聚类。综上所述,本研究的结果证实了头柱基的前部是区分硬柱基种的关键,特别是在硬柱基亚属中,这两个物种在系统发育上与canisuga最接近。另一个与系统发育相关的形态学特征是,在树形和lividus(包括I. canisuga、I. rugicollis和I. ariadnae)分支中,叶面皱褶(皱褶)是phoeoixodes种的共同特征。尽管树线虫和lividus的宿主范围并不完全重叠,但它们可能传播一些共同的病原体。相关数据表明,本文研究的两种嗜鸟蜱的生态流行病学意义可能部分相似,它们可能在以鸟类为宿主的立克次体、疏螺旋体和病毒的传播中发挥作用。
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引用次数: 0
Comparative transcriptomic insights into ticks infected by alongshan and tick-borne encephalitis viruses 感染龙山和蜱传脑炎病毒的蜱的比较转录组学见解。
IF 3.4 2区 医学 Q2 INFECTIOUS DISEASES Pub Date : 2026-01-01 DOI: 10.1016/j.ttbdis.2025.102592
Cara Leonie Ebert , Paula Hornauer , Klaus Jung , Julia Metzger , Stefanie C. Becker
Ticks are hematophagous ectoparasites and key vectors of a wide range of pathogens, including viruses, bacteria, and protozoa. Climate change and environmental shifts have contributed to the expansion of tick populations and the pathogens they harbor. Ticks rely solely on their innate immune system to combat infections, utilizing mechanisms such as RNA interference, phagocytosis, and antimicrobial peptide expression. However, pathogens have evolved strategies to evade or manipulate these defenses to facilitate their replication and transmission. This study compares the infection dynamics of two tick-borne viruses: Orthoflavivirus encephalitidis (TBEV) and Alongshan virus (ALSV). TBEV, a well-adapted arbovirus, requires both tick and vertebrate hosts for its life cycle and is a major cause of human meningitis and encephalitis across Europe and Asia. In contrast, ALSV appears to be primarily restricted to ticks, with its dependence on vertebrate hosts still unclear. Transcriptomic analyses of Ixodes ricinus ticks revealed distinct gene expression patterns in response to these viruses. TBEV infection primarily regulated genes related to immunity, defense, and digestion—reflecting its adaptation to dual-host environments and acquisition via blood feeding. ALSV infection, however, influenced signaling and infection-related pathways, suggesting a more specialized adaptation to ticks. These findings underscore the differences in immune modulation and metabolic responses between TBEV and ALSV, highlighting the need for further genomic and proteomic studies to enhance our understanding of virus-vector interactions. Such insights could inform strategies for controlling tick-borne diseases and tracking pathogen evolution.
蜱是食血的体外寄生虫,也是多种病原体的主要载体,包括病毒、细菌和原生动物。气候变化和环境变化导致了蜱虫种群和它们所携带的病原体的扩大。蜱虫完全依靠它们的先天免疫系统来对抗感染,利用RNA干扰、吞噬和抗菌肽表达等机制。然而,病原体已经进化出逃避或操纵这些防御的策略,以促进它们的复制和传播。本研究比较了两种蜱传病毒:正黄病毒脑炎(TBEV)和阿隆山病毒(ALSV)的感染动态。TBEV是一种适应性良好的虫媒病毒,其生命周期需要蜱虫和脊椎动物宿主,是欧洲和亚洲地区人类脑膜炎和脑炎的主要原因。相比之下,ALSV似乎主要局限于蜱虫,其对脊椎动物宿主的依赖性尚不清楚。蓖麻蜱的转录组学分析揭示了不同的基因表达模式,以应对这些病毒。乙型肝炎病毒感染主要调控与免疫、防御和消化相关的基因,反映了其对双宿主环境的适应和通过血液摄食获得。然而,ALSV感染影响信号传导和感染相关途径,表明对蜱虫有更专门的适应。这些发现强调了TBEV和ALSV在免疫调节和代谢反应方面的差异,强调了进一步的基因组学和蛋白质组学研究的必要性,以加强我们对病毒载体相互作用的理解。这些见解可以为控制蜱传疾病和追踪病原体进化的策略提供信息。
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引用次数: 0
Response letter to Rebuttal to Zimmermann et al. (2025) critique of TerL-based PCR 对Zimmermann等人(2025)对基于terl的PCR的批判的反驳的回复信。
IF 3.4 2区 医学 Q2 INFECTIOUS DISEASES Pub Date : 2026-01-01 DOI: 10.1016/j.ttbdis.2025.102594
Manja Zimmermann , Gabriele Margos , Christine Hartberger , Reto Lienhard , Anna J. Henningsson , Malin Lager , Mateusz Markowicz , Anna-Margarita Schötta , Andreas Sing , Benoit Jaulhac , Per-Eric Lindgren , Alje P. van Dam , Joppe W.R. Hovius , Volker Fingerle
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引用次数: 0
Genetic characterization and identification of a recent discovered genotype of Theileria orientalis (Piroplasmida: Theileriidae) in water buffaloes (Bubalus bubalis) from the Amazon region, Brazil 巴西亚马逊地区水牛(Bubalus bubalis)中一种新发现的东方黑僵菌(Piroplasmida: theilerialis)基因型的遗传特征和鉴定。
IF 3.4 2区 医学 Q2 INFECTIOUS DISEASES Pub Date : 2025-12-15 DOI: 10.1016/j.ttbdis.2025.102581
João Paulo S. Alves , Pedro H.C. Rodrigues , Anisleidy P. Castillo , Antônio A. Fonseca Junior , Cairo H.S. de Oliveira , Rômulo C. Leite , José D. Barbosa , Júlia A.G. Silveira
Theileria orientalis is typically considered a benign protozoan parasite of cattle, although certain genotypes can cause significant economic losses in the livestock industry. Despite Brazil harboring the largest buffalo (Bubalus bubalis) herd in the Western Hemisphere, information regarding T. orientalis infections in this species remains scarce. This study aimed to identify and characterize T. orientalis genotypes circulating in water buffaloes from the State of Pará, located in the Amazon region of Brazil. The major piroplasm surface protein (mpsp) gene of T. orientalis was detected by PCR in 39 out of 271 (14.4 %) buffaloes sampled from two farms in Marajó Island (n = 2) and one farm in the mainland (n = 37). Phylogenetic analysis of mpsp gene sequences revealed the presence of three genotypes: two previously described (Types N1 and N2) and one newly identified genotype (provisionally named Type N4). These findings provide the first evidence of T. orientalis genetic diversity in Brazilian buffaloes and highlight the need for further investigations into its epidemiology and potential tick vectors in South America.
虽然某些基因型会给畜牧业造成重大的经济损失,但东方曲菌通常被认为是牛的一种良性原生动物寄生虫。尽管巴西拥有西半球最大的水牛群(Bubalus bubalis),但关于该物种东方绦虫感染的信息仍然很少。本研究旨在鉴定和表征巴西亚马逊地区帕尔州水牛中循环的东方弓形虫基因型。从Marajó岛2个养殖场(n = 2)和大陆1个养殖场(n = 37)的271头水牛中,39头(14.4%)用PCR方法检测到东方弓形虫(T. orientalis)的主要螺质表面蛋白(mpsp)基因。mpsp基因序列的系统发育分析显示存在三种基因型:两种先前描述的基因型(N1型和N2型)和一种新发现的基因型(暂时命名为N4型)。这些发现提供了巴西水牛东方蜱遗传多样性的第一个证据,并强调了进一步调查其流行病学和南美洲潜在蜱虫媒介的必要性。
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引用次数: 0
Molecular characterization of Hepatozoon spp. in cats living in Germany and other European countries 德国和其他欧洲国家猫肝虫属的分子特征
IF 3.4 2区 医学 Q2 INFECTIOUS DISEASES Pub Date : 2025-12-13 DOI: 10.1016/j.ttbdis.2025.102583
Vera Geisen , Nikola Pantchev , Yury Zablotski , Majda Globokar Vrhovec , Katrin Hartmann , Michéle Bergmann , Gastón Moré , Walter Basso
Hepatozoon spp. are increasingly reported in cats from Mediterranean countries, but data for Central and Northern Europe remain limited. This study investigated the occurrence and molecular diversity of Hepatozoon spp. in 1357 blood samples from cats living in Germany and other European countries using real-time PCR targeting the 18S rRNA gene. Hepatozoon spp. DNA was detected in 58 cats (4.3 %; 95 %-CI: 3.3–5.5 %). Thirty-seven positive samples were further analyzed by conventional PCR and sequencing. Four sequence types (A-D) were detected. Hepatozoon felis sequences classified within the genogroup I (types A and B) were identified in 33 cats; Hepatozoon silvestris haplotype I (type C) in one cat; and sequences showing 98.5 % identity to H. silvestris (type D) in three cats. Younger cats had a significantly higher infection risk (p = 0.026), while no association with sex was found. Samples submitted for targeted Hepatozoon testing and travel disease screening showed higher positivity rates. Among the 37 molecularly characterized cases, 31 had a known import origin, primarily from Greece, Spain, Cyprus, Italy, Bulgaria, the United Arab Emirates, Jordan, and Turkey. Notably, the H. silvestris-positive cat from Austria had no travel history, representing the first autochthonous case in a domestic cat in Austria. This study highlights the emergence of feline Hepatozoon infections in Europe, involving genetically diverse species. Infections should be considered mainly in cats with Mediterranean origin, travel history, outdoor access, or tick exposure. Identifying vectors responsible for transmission is crucial for implementing effective prevention strategies.
据报道,地中海国家的猫越来越多地感染肝虫,但中欧和北欧的数据仍然有限。本研究采用实时荧光定量PCR (real-time PCR)技术,针对18S rRNA基因,对德国等欧洲国家1357份猫血样本中Hepatozoon spp.的发生情况和分子多样性进行了研究。在58只猫(4.3%;95% -CI: 3.3 - 5.5%)中检测到肝虫类DNA。37份阳性样本进一步进行常规PCR和测序分析。检测到4种序列类型(A-D)。在33只猫中鉴定出属于基因组I (A型和B型)的猫肝虫序列;1只猫单倍体I型(C型);3只猫的序列显示98.5%的同源性为D型。年龄较小的猫感染风险明显更高(p = 0.026),但与性别无关。提交用于靶向肝虫检测和旅行疾病筛查的样本显示出较高的阳性率。在37例具有分子特征的病例中,31例具有已知的进口来源,主要来自希腊、西班牙、塞浦路斯、意大利、保加利亚、阿拉伯联合酋长国、约旦和土耳其。值得注意的是,这只来自奥地利的希尔维斯氏蜱阳性猫没有旅行史,这是奥地利第一例本地家猫病例。这项研究强调了欧洲猫肝虫感染的出现,涉及基因多样化的物种。感染应主要考虑在地中海起源、旅行史、户外活动或接触蜱虫的猫中。确定传播媒介对于实施有效的预防战略至关重要。
{"title":"Molecular characterization of Hepatozoon spp. in cats living in Germany and other European countries","authors":"Vera Geisen ,&nbsp;Nikola Pantchev ,&nbsp;Yury Zablotski ,&nbsp;Majda Globokar Vrhovec ,&nbsp;Katrin Hartmann ,&nbsp;Michéle Bergmann ,&nbsp;Gastón Moré ,&nbsp;Walter Basso","doi":"10.1016/j.ttbdis.2025.102583","DOIUrl":"10.1016/j.ttbdis.2025.102583","url":null,"abstract":"<div><div><em>Hepatozoon</em> spp. are increasingly reported in cats from Mediterranean countries, but data for Central and Northern Europe remain limited. This study investigated the occurrence and molecular diversity of <em>Hepatozoon</em> spp. in 1357 blood samples from cats living in Germany and other European countries using real-time PCR targeting the 18S rRNA gene. <em>Hepatozoon</em> spp. DNA was detected in 58 cats (4.3 %; 95 %-CI: 3.3–5.5 %). Thirty-seven positive samples were further analyzed by conventional PCR and sequencing. Four sequence types (A-D) were detected. <em>Hepatozoon felis</em> sequences classified within the genogroup I (types A and B) were identified in 33 cats; <em>Hepatozoon silvestris</em> haplotype I (type C) in one cat; and sequences showing 98.5 % identity to <em>H. silvestris</em> (type D) in three cats. Younger cats had a significantly higher infection risk (<em>p</em> = 0.026), while no association with sex was found. Samples submitted for targeted <em>Hepatozoon</em> testing and travel disease screening showed higher positivity rates. Among the 37 molecularly characterized cases, 31 had a known import origin, primarily from Greece, Spain, Cyprus, Italy, Bulgaria, the United Arab Emirates, Jordan, and Turkey. Notably, the <em>H. silvestris</em>-positive cat from Austria had no travel history, representing the first autochthonous case in a domestic cat in Austria. This study highlights the emergence of feline <em>Hepatozoon</em> infections in Europe, involving genetically diverse species. Infections should be considered mainly in cats with Mediterranean origin, travel history, outdoor access, or tick exposure. Identifying vectors responsible for transmission is crucial for implementing effective prevention strategies.</div></div>","PeriodicalId":49320,"journal":{"name":"Ticks and Tick-borne Diseases","volume":"17 1","pages":"Article 102583"},"PeriodicalIF":3.4,"publicationDate":"2025-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145749458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Lyme arthritis: Demographic characteristics and Borrelia ospA genospecies in synovial fluid. A 17-year cohort study in Sweden 莱姆病:人口统计学特征和滑膜液中的疏螺旋体基因种。瑞典一项为期17年的队列研究。
IF 3.4 2区 医学 Q2 INFECTIOUS DISEASES Pub Date : 2025-12-11 DOI: 10.1016/j.ttbdis.2025.102582
Katharina Ornstein , Camilla Broholm , Ram B. Dessau , Ann-Cathrine Petersson
Lyme arthritis (LA) is a recognized manifestation of Lyme borreliosis in Sweden, but data on the causative Borrelia species are limited. This study aimed to describe the demographics of LA and identify Borrelia burgdorferi sensu lato (B. burgdorferi s.l.) genospecies present in synovial fluid (SF).
Patient data were collected from the test requisition form accompanying consecutive SF samples submitted to the Clinical Microbiology Laboratory in Lund, Sweden, for Borrelia DNA detection between 2007 and 2023. Detection was performed using 16S rDNA PCR, and genospecies were determined through ospA PCR followed by sequencing.
Borrelia DNA was detected in 323 samples, corresponding to 283 unique patients, from a total of 2353 samples. Species characterization was successful in 213 cases. LA was diagnosed year-round, with approximately half of the cases occurring in youth (0–19 years). Males predominated among adults (≥20 years), though less so among youth. Two species were most common: B. afzelii (104 cases, 49 %) and B. burgdorferi sensu stricto (s.s.) (70 cases, 33 %). B. garinii, B. bavariensis, and B. spielmanii were identified in 21 (9 %), 14 (7 %), and 4 (2 %) cases, respectively.
In conclusion, B. afzelii was the predominant species in SF. B. burgdorferi s.s. accounted for one-third of LA cases, despite being rarely found in ticks or humans in Sweden. B. spielmanii was detected in four cases, representing the first identification of this species in humans in Sweden and, more broadly, in synovial fluid.
莱姆病关节炎(LA)是瑞典莱姆病的一种公认的表现,但有关致病性伯氏疏螺旋体物种的数据有限。本研究旨在描述洛杉矶的人口统计学特征,并鉴定存在于滑液(SF)中的伯氏疏螺旋体(B. burgdorferi s.l.)基因种。患者数据收集自2007年至2023年间提交给瑞典隆德临床微生物实验室的连续SF样本的检测申请单,用于伯氏疏螺旋体DNA检测。采用16S rDNA PCR检测,ospA PCR测定基因种,测序。在总共2353份样本中,323份样本中检测到伯氏疏螺旋体DNA,对应283例独特患者。213例物种鉴定成功。LA全年都有诊断,大约一半的病例发生在青年(0-19岁)。男性在成人(≥20岁)中占主导地位,但在青年中较少。最常见的有2种:阿氏疏螺旋体(104例,49%)和狭义伯氏疏螺旋体(5%)。(70例,33%)。加里尼布氏杆菌21例(9%),巴伐利亚布氏杆菌14例(7%),spielmanii布氏杆菌4例(2%)。综上所述,白僵菌是SF的优势种。伯氏疏螺旋体占洛杉矶病例的三分之一,尽管在瑞典很少在蜱虫或人类身上发现。在4例病例中检测到B. spielmanii,这是瑞典首次在人类中发现该物种,更广泛地说,是在滑液中发现该物种。
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引用次数: 0
Spotted fever group Rickettsia in Haemaphysalis ticks: genetic diversity and first detection of “Candidatus Rickettsia jingxinensis” in India 蜱血蜱斑疹热群立克次体:遗传多样性和印度首次检测到“京新立克次体候选菌”。
IF 3.4 2区 医学 Q2 INFECTIOUS DISEASES Pub Date : 2025-12-11 DOI: 10.1016/j.ttbdis.2025.102580
Vinayak V , R. Balasubramanian , Siba S , Jayashri Patil , Pradnya Bhadale , Harsuni H , Sithalakshmi S , Jerlyn Varghese , Kalichamy Alagarasu
Ticks are important vectors of rickettsial pathogens, particularly in regions where livestock, wildlife, and humans overlap. Despite increasing reports of rickettsioses in India, molecular evidence of Rickettsia species in questing ticks from the Western Ghats of Kerala remains scarce. Questing ticks were collected from forest-edge and fringe habitats in Wayanad, Idukki, and Thrissur districts using standardized dragging. Species were identified morphologically, pooled, and screened for Rickettsia DNA by PCR targeting gltA and ompA genes. Amplicons were sequenced, and phylogenetic analysis was performed using reference sequences. Among 237 ticks belonging to six species, 24 % (12/50 pools) were PCR-positive for Rickettsia. The highest prevalence was observed in Haemaphysalis spinigera (50 %), followed by Haemaphysalis bispinosa (30 %) and Haemaphysalis turturis (9.5 %). Sequence analysis revealed the presence of Rickettsia massiliae and Rickettsia vini like species. Importantly, sequences closely related to “Candidatus Rickettsia jingxinensis were detected for the first time in India, in H. turturis. Several isolates showed genetic divergence from known strains, suggesting the circulation of uncharacterized Rickettsia species or strains in tick population. This study provides the first molecular evidence of “Ca. R. jingxinensis” in H. turturis from India and demonstrates a high prevalence of Rickettsia spp. in questing ticks of Kerala. Given the pathogenic potential of some of these species, enhanced surveillance and incorporation of rickettsioses into differential diagnoses of febrile illnesses are needed in South India.
蜱是立克次体病原体的重要媒介,特别是在牲畜、野生动物和人类重叠的地区。尽管印度关于立克次体病的报道越来越多,但在喀拉拉邦西高止山脉的蜱虫中,立克次体物种的分子证据仍然很少。采用标准化拖拽方法从Wayanad、Idukki和Thrissur地区的森林边缘和边缘生境中收集蜱虫。采用gltA和ompA基因为靶点的PCR方法对立克次体DNA进行了形态学鉴定、汇总和筛选。扩增子测序,并使用参考序列进行系统发育分析。6种237只蜱中,立克次体pcr阳性占24%(12/50池)。发病率最高的是棘血蜱(50%),其次是双皮血蜱(30%)和turturis血蜱(9.5%)。序列分析显示存在马氏立克次体和类似立克次体的种。重要的是,在印度的H. turturis中首次检测到与“Candidatus立克次体jingxinensis”密切相关的序列。一些分离株显示出与已知菌株的遗传差异,提示在蜱种群中存在非特征立克次体种或菌株的循环。本研究首次提供了印度土氏蜱中存在“京新氏蜱”的分子证据,并证实了喀拉拉邦蜱中立克次体的高流行率。鉴于其中一些物种具有致病潜力,南印度需要加强监测并将立克次体病纳入发热性疾病的鉴别诊断。
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引用次数: 0
Propagation of Encephalitozoon cuniculi in tick cell lines supports the plausibility of possible tick-mediated transmission of this microsporidian 在蜱细胞系中的传播支持了这种微孢子虫可能通过蜱媒介传播的可能性
IF 3.4 2区 医学 Q2 INFECTIOUS DISEASES Pub Date : 2025-12-08 DOI: 10.1016/j.ttbdis.2025.102578
Bohumil Sak , Michaela Fibigerová , Kristína Mravcová , Nikola Holubová , Silvie Šikutová , Jana Fenclová , Lesley Bell-Sakyi , Martin Kváč , Ivo Rudolf
Microsporidia, obligate intracellular parasitic fungi, are increasingly associated with asymptomatic infections. One of the most prevalent zoonotic species, Encephalitozoon cuniculi, has been detected in Ixodes ricinus ticks. Nevertheless, the capacity of microsporidia to replicate within tick hosts remains unresolved. We used tick cell lines IRE11, IRE/CTVM19 and IRE/CTVM20 along with mammalian line Vero E6 for in vitro testing of E. cuniculi propagation. We evaluated the spore number using quantitative RT-PCR and documented the presence of microsporidia in host cells microscopically. We reported successful growth of Encephalitozoon cuniculi in tested tick cell lines, with IRE/CTVM19 providing the most suitable conditions for E. cuniculi propagation, reaching up to 1459 % increase of the inoculum. Moreover, the parasitophorous vacuoles containing developmental stages of microsporidia were observed in all cell lines. Our data support the plausibility of tick-mediated transmission, providing novel insights into the epidemiology of microsporidia.
微孢子虫,专性细胞内寄生真菌,越来越多地与无症状感染相关。其中最普遍的人畜共患病种之一,脑囊虫,已被发现在蓖麻蜱。然而,微孢子虫在蜱宿主体内复制的能力仍未得到解决。我们使用蜱细胞系IRE11、IRE/CTVM19和IRE/CTVM20与哺乳动物细胞系Vero E6进行了体外测试。我们使用定量RT-PCR评估孢子数量,并在显微镜下记录了宿主细胞中微孢子虫的存在。我们报道了蜱虫脑囊虫在蜱虫细胞株中成功生长,IRE/CTVM19为蜱虫的繁殖提供了最适宜的条件,接种量可达1459%。此外,在所有细胞系中都观察到含有小孢子虫发育阶段的寄生液泡。我们的数据支持蜱媒介传播的合理性,为微孢子虫的流行病学提供了新的见解。
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引用次数: 0
Trends in incidence of tick bites and physician-reported early and late Lyme borreliosis in the Netherlands 荷兰蜱虫叮咬和医生报告的早期和晚期莱姆病发病率趋势
IF 3.4 2区 医学 Q2 INFECTIOUS DISEASES Pub Date : 2025-11-01 DOI: 10.1016/j.ttbdis.2025.102561
Oda E. van den Berg, Margriet G. Harms, Anna D. Tulen, Vanessa D. Brown, Jan van de Kassteele, Agnetha Hofhuis, Cees C. van den Wijngaard
Lyme borreliosis (LB) is a prevalent vector-borne disease in Europe. Untreated, it can cause severe complications, with some patients experiencing persistent symptoms post-treatment. In the Netherlands, tick bite consultations and erythema migrans (EM) diagnoses tripled from 1994 to 2009, but tick bite consultations declined and EM diagnoses stabilized in 2014. This study examines trends in tick bite consultations, EM diagnoses, and other LB manifestations in the Netherlands from 2014 onward.
In 2017 and 2021, questionnaires were sent to Dutch GPs to collect data on tick bite consultations and EM diagnoses. The 2021 survey additionally addressed disseminated LB and persistent symptoms attributed to LB. Data were analyzed using a negative binomial distribution, with bootstrapping applied to account for uncertainty.
The population coverage was 51 % in 2017 and 32 % in 2021. The incidence of tick bite consultations per 100,000 was 534 (518–551) in 2017 and 447 (426–470) in 2021. The incidence of EM diagnoses per 100,000 was 150 (145–155) in 2017 and 147 (140–154) in 2021. In 2021, the incidence was 5.0 (4.2–5.9) per 100,000 for disseminated LB and 5.0 (4.4–5.5) per 100,000 for persisting symptoms attributed to LB.
Compared to 2014, GP consultations for tick bites and EM diagnoses had increased in 2017. In 2021, tick bite consultations were lower than in 2017, likely due to COVID-19 restrictions. EM diagnoses were similar to 2017. Disseminated LB was lower in 2021 compared to 2010, whilst persisting symptoms attributed to LB remained stable.
莱姆病(LB)是一种在欧洲流行的媒介传播疾病。如果不治疗,它会引起严重的并发症,一些患者在治疗后会出现持续的症状。在荷兰,蜱叮咬咨询和迁移性红斑(EM)诊断从1994年到2009年增加了两倍,但蜱叮咬咨询下降,EM诊断在2014年稳定下来。本研究调查了2014年以来荷兰蜱虫叮咬咨询、EM诊断和其他LB表现的趋势。2017年和2021年,向荷兰全科医生发送了调查问卷,以收集蜱虫叮咬咨询和急诊诊断的数据。2021年的调查还解决了播散性LB和LB引起的持续症状。数据使用负二项分布进行分析,并采用自举法来解释不确定性。2017年的人口覆盖率为51%,2021年为32%。2017年每10万人中蜱虫叮咬咨询的发生率为534例(518-551例),2021年为447例(426-470例)。2017年每10万人中EM诊断的发病率为150例(145-155例),2021年为147例(140-154例)。2021年,播散性LB的发病率为5.0(4.2-5.9)/ 10万,LB持续症状的发病率为5.0(4.4-5.5)/ 10万。与2014年相比,2017年,蜱虫叮咬和EM诊断的全科医生咨询有所增加。2021年,蜱虫叮咬咨询人数低于2017年,可能是由于COVID-19限制措施。EM诊断与2017年相似。与2010年相比,2021年播散性LB降低,而LB引起的持续症状保持稳定。
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引用次数: 0
Corrigendum to “Spatial distribution and clustering of medically important tick species in Illinois: Implications for tick-borne disease risk” [Ticks and Tick-borne Diseases 16 (2025) 102533] “伊利诺伊州重要医学蜱类的空间分布和聚类:对蜱传疾病风险的影响”[蜱和蜱传疾病16(2025)102533]的勘误表。
IF 3.4 2区 医学 Q2 INFECTIOUS DISEASES Pub Date : 2025-11-01 DOI: 10.1016/j.ttbdis.2025.102558
Abrar Hussain , Csaba Varga , Brian F. Allan , Nohra Mateus-Pinilla , Rebecca L. Smith
{"title":"Corrigendum to “Spatial distribution and clustering of medically important tick species in Illinois: Implications for tick-borne disease risk” [Ticks and Tick-borne Diseases 16 (2025) 102533]","authors":"Abrar Hussain ,&nbsp;Csaba Varga ,&nbsp;Brian F. Allan ,&nbsp;Nohra Mateus-Pinilla ,&nbsp;Rebecca L. Smith","doi":"10.1016/j.ttbdis.2025.102558","DOIUrl":"10.1016/j.ttbdis.2025.102558","url":null,"abstract":"","PeriodicalId":49320,"journal":{"name":"Ticks and Tick-borne Diseases","volume":"16 6","pages":"Article 102558"},"PeriodicalIF":3.4,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145330651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Ticks and Tick-borne Diseases
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