枝腺科吸虫一新亚种(吸虫纲:复殖目)

本文记述了寄生于蛙类的枝腺科吸虫一新亚种——柔弱似侧殖吸虫四川亚种Pleurogenoides tener sichuanensis subsp.nov,。新亚种肠支伸至睾丸之前;卵巢近圆形;子宫经虫体左侧前伸,并在肠管、食道和口吸盘区域形成盘曲;生殖孔位于食道水平等特征而不同于指名亚种Pleurogenoides tener tener。新亚种具有食道和子宫末段,睾丸并列,生殖孔位于食道水平等特征而区别于近似种Pleurogenoides ifranensis。     

坚盘属(Pycnoporus)吸虫的分类及三新种的描述(吸虫纲:枝腺科)

关于我国枝腺科(Lecithodendriidae Odhner,1911)吸虫,福井玉夫与尾形藤治(1939)曾报告东北地区所采得的肠前腺属(Prosthodendrium)吸虫一种;陈心陶(1954)对肠前腺属吸虫的分类进行了研究,记载了华南地区采得的肠前腺属吸虫六种,并将肠前腺属中具有长形口吸盘与长形口的虫种分出,另建长吸盘属(Longitrema Chen,1954)。综上所述,我国已有记载的枝腺科吸虫仅肠前腺属六种,本科其他属虫种尚未见文献记载。作者     

中国颊脊隐翅虫属比桑颊脊隐翅虫群三新亚种(鞘翅目,隐翅虫科,隐翅虫亚科)

记述中国四川颊脊隐翅虫属Quedius比桑颊脊隐翅虫群(beesoni group) 3新亚种,北川颊脊隐翅虫Q. (M.)noboruitoi beichuanensis,片口颊脊隐翅虫Q. (M.)noboruitoi piankouatilis,二郎山颊脊隐翅虫Q.(M.)noboruitoi erlangshanus。首次记录来自中国重庆的比桑颊脊隐翅虫Q. (M.)beesoni Cameron。列出了比桑颊脊隐翅虫群中国已知种和亚种检索表。     

中国苔藓动物新亚种和新纪录：唇口目,筛孔苔虫科

本文记述中国苔藓动物一新亚种:强似膜孔苔虫舟山亚种;三新纪录:平壁托孔苔虫、楯扇孔苔虫、扇形管孔苔虫的形态特征,采集地及分布。新亚种并与近似种作了比较。     

浙江蔷薇科新分类群

描述了浙江蔷薇科1新亚种和1新变种,并分别附有线条图。它们是:腺瓣蔷薇(新亚种)和遂昌红腺悬钩子(新变种)。腺瓣蔷薇与模式亚种单花合柱蔷薇区别在托叶、叶柄和萼片仅密被短柔毛而无腺毛,小叶片较大,两面近无毛或疏被短柔毛,伞房花序具1～3花,花瓣宽倒卵形。遂昌红腺悬钩子与模式变种红腺悬钩子区别在于花梗、小枝和老枝密被腺毛而无柔毛,小叶片两面具腺毛,萼片较长,长13～15mm,先端长尾尖。     

三种危害性纤毛虫的形态学研究

三种分离自海水养殖水体中的纤毛虫原生动物,含一新亚种及两种国内新记录：相似瓜形膜袋虫,有唇蓝口虫和贪食拟阿脑虫;本文对其纤毛图式及重要的形态学特征做了综合的描述。有唇蓝口虫为可导致水质恶化的赤潮生物,其余两种则有明显的嗜污习性,或附着养殖动物的浅表倍位从而有可能构成对宿主的危害。     

湖南鸣禽的滑口吸虫研究(复殖目:短咽科)

对湖南省鸣禽寄生虫调查中检获短咽科滑口吸虫属Ｇｌａｐｈｙｒｏｓｔｏｍｕｍ虫种５个,其中有３个新种,画眉滑口吸虫Ｇｌａｐｈｙｒｏｓｔｏｍｕｍ ｇａｒｒｕｌｕｍ ｓｐ．ｎｏｖ。,两吸盘约等大,睾丸偏于体右侧,卵黄腺始于腹吸盘水平;湖南滑口吸虫虫体较短小,体表在腹吸盘前被小棘,口腹吸盘比约１．０：１．５,睾丸偏体左侧,卵黄腺起始于口吸盘后缘至咽水平,小型滑口吸虫Ｇ．ｍｉｎｏｒ ｓｐ．ｎｏｖ虫体较小,体表     

中国缓步动物门二新种及三新纪录种和亚种(异缓步纲,棘影熊虫科;真缓步纲,小斑熊虫科,大生熊虫科,高生熊虫科)

记述采自河南省洛阳市、湖北省京山县和四川省都江堰市的缓步动物门2新种及3新纪录种和亚种：异缓步纲棘影熊虫科的四棘棘影熊虫,新纪录Echiniscus quadrispinosus Richters,1902;真缓步纲小斑熊虫科的都江小斑熊虫,新种Milnesium dujiangensis sp.nov,大生熊虫科的节值大生熊虫戴冠亚种,新纪录Macrobiotus harmsworthi coronatus Barros,1942;高生熊虫科的大指等高熊虫,新纪录Isohypsibius macrodactylus(Maucci,1978)和京山等高熊虫,新种Isohysibius jingshanessis sp.nov.     

福建省经济作物寄生线虫的研究Ⅲ.南靖柑桔的福建根结线虫新种描述

本文报道柑桔的福建根结线虫Meloidogyne fujianensis新种。新种的特征是雌虫阴门右缘外侧有一中央凹陷的小圆隆,口针较短,排泄孔开口距头顶较远,雌虫、雄虫和第二期幼虫背食道腺孔至口针基球底部的距离较长。第二期幼虫a值较小,直肠不膨大,半月体与排泄孔处于同一水平上。这些特征与近似种南方根结线虫M.incognita和花生根结线虫M.arenaria可相区别。     

脂肪酸气相色谱图鉴别方形黄鼠蚤各亚种的初步研究

方形黄鼠蚤４个亚种在脂肪酸组分和百分含量上具有明显不同,其中雌虫在１８个组分上有区别雄虫在１４个组分上有区别。此外,雌虫在Ｃ１６：１和Ｃ２０：０的含量上,雄虫在Ｃ１６：１的含量上,４个亚种之间均具有显著性差异。在Ｃ１２－Ｃ２２区间内有９个含量较高的主要组分,是４个亚种所共有的。方形黄鼠蚤在我国境内分布有４个亚种即松江亚种、蒙古     

A Unique Protease Cleavage Site Predicted in the Spike Protein of the Novel Pneumonia Coronavirus (2019-nCoV) Potentially Related to Viral Transmissibility

正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases     

Curcuminoids as inhibitors of thioredoxin reductase: A receptor based pharmacophore study with distance mapping of the active site

Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.     

Comparative morphology of the carpel in the Liliaceae: Hewardieae, Petrosavieae, and Tricyrteae

The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle.     

Enterovirus 71 3C proteolytically processes the histone H3 N-terminal tail during infection

Highlights
1. The N-terminal tail of histone H3 is specifically cleaved during EV71 infection.
2. Viral protease 3C is identified as a protease responsible for proteolytically processing the N-terminal H3 tail.
3. Our finding reveals a new epigenetic regulatory mechanism for Enterovirus 71 in virus-host interactions.     

Detection of EBV and HHV6 in the Brain Tissue of Patients with Rasmussen’s Encephalitis

Rasmussen’s encephalitis (RE) is a rare pediatric neurological disorder, and the exact etiology is not clear. Viral infection may be involved in the pathogenesis of RE, but conflicting results have reported. In this study, we evaluated the expression of both Epstein-Barr virus (EBV) and human herpes virus (HHV) 6 antigens in brain sections from 30 patients with RE and 16 control individuals by immunohistochemistry. In the RE group, EBV and HHV6 antigens were detected in 56.7% (17/30) and 50% (15/30) of individuals, respectively. In contrast, no detectable EBV and HHV6 antigen expression was found in brain tissues of the control group. The co-expression of EBV and HHV6 was detected in 20.0% (6/30) of individuals. In particular, a 4-year-old boy had a typical clinical course, including a medical history of viral encephalitis, intractable epilepsy, and hemispheric atrophy. The co-expression of EBV and HHV6 was detected in neurons and astrocytes in the brain tissue, accompanied by a high frequency of CD8⁺ T cells. Our results suggest that EBV and HHV6 infection and the activation of CD8⁺ T cells are involved in the pathogenesis of RE.     

Perinatal Vertical Transmission of Chikungunya Virus in Ruili,a Town on the Border between China and Myanmar

正Dear Editor,Chikungunya virus (CHIKV), an arbovirus in the family of Togaviridae, genus Alphavirus, is transmitted by the A.aegyptii or A. albopictus mosquito, and causes disease in humans characterized by fever, rash, and arthralgia (Silva and Dermody 2017; Suhrbier 2019). It was first reported in 1953 in Tanzania, and caused only a few outbreaks and sporadic cases in Africa and Asia in last century. However, in the epidemic in 2004, CHIKV acquired mutations that conferred enhanced transmission by the A. albopictus mosquito(Schuffenecker et al. 2006). Since then, it has successively caused outbreaks in Africa, the Indian Ocean, South East Asia, the South America, and Europe (Zeller et al. 2016).