简介：AbstractInfectious diseases are severe public health events that threaten global health. Prophylactic vaccines have been considered as the most effective strategy to train the immune system to recognize and clear pathogenic infections. However, the existing vaccines against infectious diseases have several limitations, such as difficulties in mass manufacturing and storage, weak immunogenicity, and low efficiency of available adjuvants. Biomaterials, especially functional polymers, are expected to break through these bottlenecks based on the advantages of biocompatibility, degradability, controlled synthesis, easy modification, precise targeting, and immune modulation, which are excellent carriers and adjuvants of vaccines. This review mainly summarizes the application of immunologically effective polymers-enhanced vaccines against viruses- and bacteria-related infectious diseases and predicted their potential improvements.

简介：AbstractBird infections with highly pathogenic avian influenza A(H5N6) viruses have been identified since 2014. With very limited occasion, the virus could sporadically spilled over to infect humans. It has been recognized that all human infections were within southern region of Mainland China until the case reported here in Beijing in Aug. 2019. This was the first human case infected with highly pathogenic avian influenza A(H5N6) virus in northern China. The infection was confirmed by real-time RT-PCR assay. The whole genome sequences were obtained from clinical sample. Genetic characteristics of the virus were identified similar to those of previous avian influenza A(H5N6) viruses, retaining the main features of the avian influenza virus.

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简介：TherecoveryofGefromlignitebymicroorganismincludestwostages:(1)thebreaking-downofGecomplexofhumusinligniteintosimplecompoundsassistedbymicroorganism;(2)thedesorptionofGecompoundsfromthelignite.TherecoveryrateofGehasbeenenhancedby14%sincethediscoveryofadsorptionanddesorptionofGefromcoal.TheeffectsofpH,leachingagents,andcoalsizeontherecoveryofGewereexperimentallyinvestigated,andtheoptimizedprocessparameterswereobtained.ThereactionheatofGeadsorptionanddesorptioninlignitewasdetermined.Itisabout23-53kJ/mol,whichrevealsthattheadsorptionbelongstophysicalprocess.TherecoveryrateofGefromlignitewithdirectmicroorganismleachingcanreachabout85%,whichishigherthanthatof60%reportedelsewhere.ApotentialprocessforleachingGeinlignitewassuggested.

简介：AbstractInfectious diseases remain as an important public health threat to humans. Research into pathogens can be useful for planning an organized response to infectious diseases. Bibliometric analysis is an important method for scientific research and assessing capability. In this study, 100 pathogens of public health importance were selected, and the distributions of annual, national, institutional, and journal publications on Science Citation Index (SCI) journals were statistically analyzed. The United States of America ranked the first in terms of the number of relevant studies published. China attaches great importance to the prevention and control of infectious diseases, but still needs to improve in the following areas: for example, insufficient SCI reports on particular pathogens, institutions SCI reports on pathogens lower than world top pathogen research institutions, and lack of influential international pathogen-related journals. Scientific literature databases are important tools for science-of-science analysis. The findings of this study shed light on the hot spots and the ignored spots in pathogen researches, and thus would be useful for drawing a national and institutional research plan.

简介：规章的T(Treg)房间被认为由于他们在维持有免疫力的动态平衡和自我忍耐的必要角色对autoimmunity是保护的CD4+T房间的一个亚系的Foxp3+。然而，Treg房间以系专门化和镇压功能在vivo是不稳定的。这些不稳定的Treg房间在疾病的致病起作用，它关于人的Treg房间治疗引起安全担心。在这评论，我们加亮最近的调查结果在不同疾病模型表明Treg房间的病原的变换。

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简介：Wolbachia是感染大量节肢动物和丝虫的线虫的细胞内部的共生者。蚜虫从事与他们的endosymbionts的多样、复杂的关系。Wolbachia的四超群(A，B，M和N)以前在蚜虫和超群M被检测，N仅仅在蚜虫被发现。在这研究，我们在中国在蚜虫的自然人口检测了并且描述Wolbachia感染。三超群(A，B和M)在检验蚜虫种类被发现。超群M是优势的，而超群A和B仅仅在某些种类被检测。超群N没在这研究被发现。也就是，有在蚜虫的Wolbachia的四个感染模式有超群M的感染独自一个，有超群A和M，有超群B和M的合作感染，和有超群A，B和M的合作感染的合作感染。仅仅有超群M的感染的模式是通用的并且在所有评估亚科被发现。仅仅二个亚科，Aphidinae和Lachninae，表明了介绍所有四个感染模式。三个模式在Calaphidinae被观察(M，A&M，B&M)并且Eriosomatinae(M，B&M，A&B&M)。二个模式在Anoeciinae被观察(M，A&M)并且Greenideinae(M，B&M)，并且一仅仅模式(M)在Aphidoidea的留下的家庭或亚科被观察。这些结果显示在中国蚜虫的Wolbachia感染是普遍的。种系发生的分析建议超群M在中国在蚜虫的所有主人种类之中很快并且最近散布了的那Wolbachia。为这传播和它的机制的原因在他们的蚜虫主人上与Wolbachia的可能的效果一起被讨论。

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简介：TogetabetterunderstandingofthestarvationsurvivalstrategyofpathogenicVibrioalginolyticus,log-phasecellswereinoculatedintosterilenaturalseawaterforstarvationstudies.Theresultsshowedthatalloftotalbacterianumber,viablebacterianumberandCFUnumberofV.alginolyticusincreasedremarkablyattheinitialstarvationstage;afterreachingtheirpeaksat5d,bothtotalbacterianumberandviablebacterianumberofV.alginolyticusfellslowly,whiletheCFUnumberfellmorequicklyafterreachingitspeakat10d;V.alginolyticuselongatedtheircellsattheprophaseofstarvation,andthenshrunktheirvolumeandturnedtheirshapesintoovalsfromrodsattheanaphaseofstarvation;starvedcellsshowedmoresensitivitytoheatingandUV;starvedcellsshowednosignificantdifferencefromunstarvedonesatthelowestdetectionlimitdeterminedbyindirectenzyme-linkedimmunosorbentassay(ELISA);starvedcells'abilitytoadheretotheskinmucusoflargeyellowcroaker(Pseudosciaenacrocea)showedasharpdeclineasthestarvationtimeincreases;thecellularproteinofV.alginolyticusincreasedremarkablyattheanaphaseofstarvation.TheresultsindicatedthatpathogenicV.alginolyticuscouldsurviveinstarvationforrelativelylongperiodsoftime(≥2months)in28℃naturalseawaterduetothemorphologicalandphysiologicalchanges;however,starvedV.alginolyticuscellsshowedlessvirulenceandhighersensitivityunderenvironmentalstresses.

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简介：AbstractIntraamniotic infection (IAI) or chorioamnionitis is a common cause of preterm birth and may cause adverse neonatal outcomes, including neonatal pneumonia, respiratory distress, meningitis, sepsis, and death. Maternal morbidities from intraamniotic infection include dysfunctional labor requiring increased intervention, cesarean birth, postpartum uterine atony with hemorrhage, endometritis, peritonitis, sepsis, adult respiratory distress syndrome and, rarely, death. Chorioamnionitis can result from an ascending infection, iatrogenic causes or transplacental passage from maternal blood-borne infections. The clinical findings of chorioamnionitis include maternal fever (≥38 °C), maternal (>100 beats per minute) and/or fetal tachycardia (>160 beats per minute), maternal leukocytosis on complete blood count (>15 000 cells/mm3), and uterine tenderness and/or purulent and/or foul-smelling amniotic fluid. The management of chorioamnionitis mainly includes antibiotic therapy and delivery. Women with previable preterm premature rupture of membranes should be offered realistic counseling from a multidisciplinary approach. The separation of the mother and the fetus to preserve the life of the mother should prioritize delivery methods that result in a living fetus if possible, with appropriate neonatal resuscitation available.

简介：AbstractBackground:The ongoing COVID-19 pandemic hit South America badly with multiple waves. Different COVID-19 variants have been storming across the region, leading to more severe infections and deaths even in places with high vaccination coverage. This study aims to assess the spatiotemporal variability of the COVID-19 pandemic and estimate the infection fatality rate (IFR), infection attack rate (IAR) and reproduction number (R0) for twelve most affected South American countries.Methods:We fit a susceptible-exposed-infectious-recovered (SEIR)-based model with a time-varying transmission rate to the reported COVID-19 deaths for the twelve South American countries with the highest mortalities. Most of the epidemiological datasets analysed in this work are retrieved from the disease surveillance systems by the World Health Organization, Johns Hopkins Coronavirus Resource Center and Our World in Data. We investigate the COVID-19 mortalities in these countries, which could represent the situation for the overall South American region. We employ COVID-19 dynamic model with-and-without vaccination considering time-varying flexible transmission rate to estimate IFR, IAR and R0 of COVID-19 for the South American countries.Results:We simulate the model in each scenario under suitable parameter settings and yield biologically reasonable estimates for IFR (varies between 0.303% and 0.723%), IAR (varies between 0.03 and 0.784) and R0 (varies between 0.7 and 2.5) for the 12 South American countries. We observe that the severity, dynamical patterns of deaths and time-varying transmission rates among the countries are highly heterogeneous. Further analysis of the model with the effect of vaccination highlights that increasing the vaccination rate could help suppress the pandemic in South America.Conclusions:This study reveals possible reasons for the two waves of COVID-19 outbreaks in South America. We observed reductions in the transmission rate corresponding to each wave plausibly due to improvement in nonpharmaceutical interventions measures and human protective behavioral reaction to recent deaths. Thus, strategies coupling social distancing and vaccination could substantially suppress the mortality rate of COVID-19 in South America.

简介：AbstractInfectious disease outbreaks have seriously endangered global health owing to the scarcity of testing materials and techniques. Diversified materials and methods should be urgently developed for rapid detection and discrimination of pathogenic microorganisms. Conjugated polymer (CP) materials are macromolecular compounds comprising numerous covalently bonded luminescent units. They have excellent light-harvesting and optical signal amplification capabilities owing to the transmission of excitation energy along their backbone. In recent years, CP materials have aroused research enthusiasm in the biosensors field because of their outstanding optoelectronic properties. This brief manuscript provides an overall review of recent progress achieved in CP-based systems for pathogen sensing.

简介：AbstractCorynespora cassiicola is a common plant pathogen responsible for leaf-spotting diseases in the tropical and subtropical areas. C. cassiicola seldom causes human infections. Here we describe a case of subcutaneous phaeohyphomycosis caused by C. cassiicola in a 76-year-old Chinese man, who presented to our hospital with a purulent discharge and painful sensation on his right leg. Skin biopsy revealed an abscess, and culture confirmed C. cassiicola to be the causative agent. The result was further identified by sequence analysis of the internal transcribed spacer region. The patient was successfully treated with systemic voriconazole and wound debridement: the lesion disappeared after 20 days.

简介：现在的学习被承担决定病原并且M的isolates的基因差异。从斯里兰卡的湿、中间、干燥的地区收集考虑到的oryzae开发授与持久的抵抗到米饭的米饭变化强风。不重要词法或生长变化在学习的isolates之中存在。基因差异孤立由执行Pot2transposable决定元素基于repetitive

简介：AbstractChronic wounds have always been a tough fight in clinical practice, which can not only make patients suffer from pain physically and mentally but also impose a heavy burden on the society. More than one factor is relevant to each step of the development of chronic wounds. Along with the in-depth research, we have realized that figuring out the pathophysiological mechanism of chronic wounds is the foundation of treatment, while wound infection is the key point concerned. The cause of infection should be identified and prevented promptly once diagnosed. This paper mainly describes the mechanism, diagnosis and therapeutic strategies of chronic wound infection, and will put an emphasis on the principle of debridement.

简介：AbstractBismuth-containing quadruple therapy (BQT) has long been recommended for Helicobacter pylori (H. pylori) eradication in China. Meanwhile, in the latest national consensus in China, dual therapy (DT) comprising an acid suppressor and amoxicillin has also been recommended. In recent years, the eradication rate of H. pylori has reached >90% using DT, which has been used not only as a first-line treatment but also as a rescue treatment. Compared with BQT, DT has great potential for H. pylori eradication; however, it has some limitations. This review summarizes the development of DT and its application in H. pylori eradication. The H. pylori eradication rates of DT were comparable to or even higher than those of BQT or standard triple therapy, especially in the first-line treatment. The incidence of adverse events associated with DT was lower than that with other therapies. Furthermore, there were no significant differences in the effects of dual and quadruple therapies on gastrointestinal microecology. In the short term, H. pylori eradication causes certain fluctuations in the gastrointestinal microbiota; however, in the long term, the gastrointestinal microbiota eventually returns to its normal state. In the penicillin-naïve population, patients receiving DT have a high eradiation rate, better compliance, lower incidence of adverse reactions, and lower primary and secondary resistance to amoxicillin. These findings suggest the safety, efficacy, and potential of DT for H. pylori eradication.

简介：ThisarticleisageneralreviewoftheevolvementofHIV/AIDS-relatedpublicpoliciesinChinasince1980's.Ittrackstheimportantlaws,regulationsandothergovernmentaldocumentsinregardtoHIV/AIDSpreventionmainlyatcentrallevel.