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M. D. Pintore L. Ceballos B. Iulini L. Tomassone A. Pautasso D. Corbellini F. Rizzo M. L. Mandola M. Bardelli S. Peletto P. L. Acutis A. Mannelli C. Casalone 《Zoonoses and public health》2015,62(5):365-374
Following reports of human cases of Lyme borreliosis from the Ossola Valley, a mountainous area of Piemonte, north‐western Italy, the abundance and altitudinal distribution of ticks, and infection of these vectors with Borrelia burgdorferi sensu lato were evaluated. A total of 1662 host‐seeking Ixodes ricinus were collected by dragging from April to September 2011 at locations between 400 and 1450 m above sea level. Additional 104 I. ricinus were collected from 35 hunted wild animals (4 chamois, 8 roe deer, 23 red deer). Tick density, expressed as the number of ticks per 100 m2, resulted highly variable among different areas, ranging from 0 to 105 larvae and from 0 to 22 nymphs. A sample of 352 ticks (327 from dragging and 25 from wild animals) was screened by a PCR assay targeting a fragment of the 16S rRNA gene of B. burgdorferi s.l. Positive samples were confirmed with a PCR assay specific for the 5S‐23S rRNA intergenic spacer region and sequenced. Four genospecies were found: B. afzelii (prevalence 4.0%), B. lusitaniae (4.0%), B. garinii (1.5%) and B. valaisiana (0.3%). Phylogenetic analysis based on the ospC gene showed that most of the Borrelia strains from pathogenic genospecies had the potential for human infection and for invasion of secondary body sites. 相似文献
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Background
Lyme disease is commonly diagnosed in humans in Latvia, but up to date no studies have been performed to investigate its prevalence in dogs. The aim of this study was to evaluate if seroprevalence against B. burgdorferi sensu lato (B. burgdorferi s.l.) and co-expression of antibodies against B.burgdorferi s.l. and A. phagocytophilum is higher in dogs with clinical suspicion of tick-borne diseases compared to healthy dogs.Findings
Venous blood was taken from healthy dogs (n=441) and dogs suspected to have borreliosis and/ or canine granulocytic anaplasmosis (n=29). The presence of antibodies was detected with SNAP 4Dx test (IDEXX, Westbrook, Maine, USA). The seroprevalence against B. burgdorferi s.l. in healthy dogs was 2.49% (11/441) and 36% (4/11) of seropositive dogs had antibodies against both of investigated bacteria. None of the dogs in sick dog group had detectable antibodies against B. burgdorferi s.l.Conclusions
We conclude that seroprevalence to B. burgdorferi s.l. in dogs in Latvia is low and that dogs with suspicion of tick-borne disease do not have higher B. burgdorferi s.l. seroprevalence than healthy dogs. Dogs that express antibodies against B. burgdorferi s.l. frequently co-express antibodies against A. phagocytophilum. 相似文献4.
基于叶绿体trnL-F序列对广义披碱草属物种的系统进化研究 总被引：1，自引：1，他引：0
广义披碱草属包括了披碱草属、鹅观草属、猬草属、裂颖草属和仲彬草属。为深入研究这5个小麦族多年生属的系统地位、母本来源及St染色体组的来源和分化等问题,本研究根据叶绿体DNA trnL-F序列构建了系统树和网状结构图。结果表明,1)广义披碱草属物种的母本不完全来源于拟鹅观草属的St染色体组,其中黑药仲彬草和梭罗仲彬草的母本染色体组为P染色体组,Hystrix duthiei及长芒猬草的母本染色体组为Ns染色体组;2)系统树中反映了P、W和St染色体组之间具有较近的亲缘关系,它们与H和Ns染色体组的关系较远;3)仲彬草属中黑药仲彬草和梭罗仲彬草与冰草属的二倍体物种聚类在一起,表明黑药仲彬草和梭罗仲彬草与冰草属的关系较近;猬草属中猬草聚在St支中,而H. duthiei和长芒猬草包括在Ns支中,表明它们具有不同的染色体组组成;4)5个不同地理分布的具有St染色体组的拟鹅观草属二倍体物种没有形成一个单系组,表明St染色体组在二倍体物种中存在一定程度的分化;在异源多倍体物种中,其St染色体组的质体序列构成了不同的分支,表明St染色体组在多倍体物种中也具有分化;5)亚洲分布的拟鹅观草属二倍体物种可能参与了大部分欧亚物种的起源,北美分布物种的St染色体组可能来源于北美的拟鹅观草属物种;有些物种在多倍化起源过程中可能发生了重复杂交过程。 相似文献
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Emma L. Gillingham Jessica L. Hall Richard J. Birtles Kevin J. Bown Jolyon M. Medlock Robert Smith Kayleigh M. Hansford Jenny C. Warner Matthew Dryden Maaike E. Pietzsch 《Zoonoses and public health》2020,67(5):591-599
Lyme borreliosis (LB) is a tick‐borne disease caused by Borrelia burgdorferi sensu lato complex. In Europe, it is predominately transmitted by the sheep tick, Ixodes ricinus. Compared with other European countries, the United Kingdom (UK) is considered to have a low incidence of LB, although this varies regionally. To determine whether an association exists between tick bite consultations and LB incidence in the UK, retrospective questionnaires were sent to general practitioners (GPs) in high (Wiltshire), medium (Cumbria) and low (Wales) incidence areas. During 2011, the greatest incidence of consultations for tick bites was reported by GPs in Cumbria (204 consultations per 100,000 inhabitants), followed by Wiltshire (160 per 100,000 population) and Wales (54 per 100,000 population). In Wiltshire and Cumbria, GPs predominantly provided advice on tick removal, whilst Welsh GPs mostly advised patients on tick bite prevention. Focusing on Cumbria during 2011–2013, 72.5% of GPs removed ticks from patients (incidence of 101 consultations per 100,000 population), and more GPs diagnosed LB based on clinical features than laboratory‐confirmed diagnoses. To date, this is the first study to investigate the incidence of tick bite consultations and LB in England and Wales. 相似文献
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通过对万佛山自然保护区的多次野外采集和调查,研究发现万佛山地区分布的虫草分属6个种,分别为丝虫草Ophiocordyceps filiformis、珊瑚虫草Cordyceps martialis、粉被虫草C.pruinosa、下垂虫草O.nutans、亚黄蜂虫草O.oxycephala和莲状虫草C.nelumboides。其中下垂虫草和丝虫草最多,分别占总数的28%和23%。虫草的寄主涉及到鳞翅目的幼虫和茧、蜂的成虫、蜘蛛和蝽象,而主要寄主为鳞翅目的幼虫,占总数的58%。莲状虫草为中国大陆新记录种,此前仅在日本和中国台湾省有过报道。 相似文献
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橡胶、松树木材变色菌研究及对其中之长喙壳属菌的特性研究 总被引：3，自引：0，他引：3
研究了从橡胶和松树变色木上分离到的长喙壳属(Ceratocystis sensu lato)和其他木材变色菌。证明引起这两种木材变色的主要真菌是Ceratocystisspp.,Ophostomaspp.,Lasiodiplodia theobromae和Sphaeropsissp.。进而研讨了其中之长喙壳属真菌的分类学和形态学特征,传播媒介,寄主范围,以及温度对长喙壳菌引起的木材变色速度、菌落生长、子囊壳的形成和对子囊孢子成熟的影响。 相似文献
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