scholarly journals Defining Virus-Carrier Networks That Shape the Composition of the Mosquito Core Virome of an Ecosystem

Author(s):  
Kostantinos Konstantinidis ◽  
Nikolas Dovrolis ◽  
Adamantia Kouvela ◽  
Katerina Kassela ◽  
Maria Goreti Rosa Freitas ◽  
...  

Abstract BackgroundMosquitoes are the most important vectors of emerging infectious diseases. During the past decade, our understanding of the diversity of viruses they carry has greatly expanded. Most of these viruses are considered mosquito-specific, while there is increasing evidence that these viruses may affect mosquito vector potential. Metagenomics approaches have focused on specific mosquito species for the identification of what is called core virome. However, in most ecosystems, multiple species may participate in virus emergence and circulation, while there is lack of understanding on the viruses-carrier/host network for both vector-borne and mosquito-specific viruses. Results Here, we studied the core mosquito virome in a diverse ecosystem comprised of 24 different mosquito species. Analysis of these 24 diverse viromes resulted in the discovery of 35 viruses with known genetic traits and 9 novel viruses. Comparison of the viromes of the 24 individual species revealed novel relationships between mosquito species and virus families, as most of the mosquito species had never been analysed in the past. Groups of related viruses and mosquito species from multiple genera formed a complex network in the ecosystem. Analyses of whole traps of mosquitoes of variable composition not only showed a stable core virome for each species but also a relationship between mosquito population and virome composition.ConclusionsOur study highlighted the importance of a holistic approach regarding mosquito viromes in rich and diverse ecosystems. Our data further supported the idea of a stable core virome, characteristic of each mosquito species. The remarkable stability of the core virome seemed to determine the composition of the total mosquito core virome of a habitat in the ecosystem.

2017 ◽  
Vol 43 (2) ◽  
pp. 9-20 ◽  
Author(s):  
dr hab, prof. SGH Teresa Pakulska ◽  
dr Małgorzata Poniatowska-Jaksch

The information revolution has caused that the companies operate both in the traditional and virtual space. This second dimension changes the business models of the past, and thus implies the necessity to look slightly different on the meaning of the environment and its role in shaping the competitive advantages of the company than during the industrial revolution. This article presents an original analytical proposal of a holistic approach to business, referred to as geobusiness. At the core of this concept, there are three assumptions: each economic activity is carried out in geospace, the market on which the companies compete evolves into an open market, geospace and business are strongly interdependent.


2004 ◽  
Vol 34 (136) ◽  
pp. 339-356
Author(s):  
Tobias Wölfle ◽  
Oliver Schöller

Under the term “Hilfe zur Arbeit” (aid for work) the federal law of social welfare subsumes all kinds of labour disciplining instruments. First, the paper shows the historical connection of welfare and labour disciplining mechanisms in the context of different periods within capitalist development. In a second step, against the background of historical experiences, we will analyse the trends of “Hilfe zur Arbeit” during the past two decades. It will be shown that by the rise of unemployment, the impact of labour disciplining aspects of “Hilfe zur Arbeit” has increased both on the federal and on the municipal level. For this reason the leverage of the liberal paradigm would take place even in the core of social rights.


2014 ◽  
Vol 7 (2) ◽  
pp. 136-151 ◽  
Author(s):  
Sung-Ae Lee

To displace a character in time is to depict a character who becomes acutely conscious of his or her status as other, as she or he strives to comprehend and interact with a culture whose mentality is both familiar and different in obvious and subtle ways. Two main types of time travel pose a philosophical distinction between visiting the past with knowledge of the future and trying to inhabit the future with past cultural knowledge, but in either case the unpredictable impact a time traveller may have on another society is always a prominent theme. At the core of Japanese time travel narratives is a contrast between self-interested and eudaimonic life styles as these are reflected by the time traveller's activities. Eudaimonia is a ‘flourishing life’, a life focused on what is valuable for human beings and the grounding of that value in altruistic concern for others. In a study of multimodal narratives belonging to two sets – adaptations of Tsutsui Yasutaka's young adult novella The Girl Who Leapt Through Time and Yamazaki Mari's manga series Thermae Romae – this article examines how time travel narratives in anime and live action film affirm that eudaimonic living is always a core value to be nurtured.


Author(s):  
Nguyen Van Dung ◽  
Giang Khac Binh

As developing programs is the core in fostering knowledge on ethnic work for cadres and civil servants under Decision No. 402/QD-TTg dated 14/3/2016 of the Prime Minister, it is urgent to build training program on ethnic minority affairs for 04 target groups in the political system from central to local by 2020 with a vision to 2030. The article highlighted basic issues of practical basis to design training program of ethnic minority affairs in the past years; suggested solutions to build the training programs in integration and globalization period.


Author(s):  
Pasi Heikkurinen

This article investigates human–nature relations in the light of the recent call for degrowth, a radical reduction of matter–energy throughput in over-producing and over-consuming cultures. It outlines a culturally sensitive response to a (conceived) paradox where humans embedded in nature experience alienation and estrangement from it. The article finds that if nature has a core, then the experienced distance makes sense. To describe the core of nature, three temporal lenses are employed: the core of nature as ‘the past’, ‘the future’, and ‘the present’. It is proposed that while the degrowth movement should be inclusive of temporal perspectives, the lens of the present should be emphasised to balance out the prevailing romanticism and futurism in the theory and practice of degrowth.


2020 ◽  
Vol 10 (1) ◽  
pp. 67-77
Author(s):  
Amos Watentena ◽  
Ikem Chris Okoye ◽  
Ikechukwu Eugene Onah ◽  
Onwude Cosmas Ogbonnaya ◽  
Emmanuel Ogudu

Mosquitoes of Aedes species are vectors of several arboviral diseases which continue to be a major public health problem in Nigeria. This study among other things, morphologically identified Aedes mosquitoes collected from Nsukka LGA and used an allele specific PCR amplification for discrimination of dengue vectors. Larval sampling, BG-sentinel traps and modified human landing catches were used for mosquito sampling in two selected autonomous communities of Nsukka LGA (Nsukka and Obimo). A total of 124 Aedes mosquitoes consisting of five (5) different species were collected from April to June, 2019 in a cross-sectional study that covered 126 households, under 76 distinct geographical coordinates. Larvae was mainly collected from plastic containers 73% (n=224), metallic containers 14% (n=43), earthen pots 9% (n=29) and used car tyres 3% (n=9), reared to adult stage 69.35% (n=86), and all mosquitoes were identified using standard morphological keys. Five (5) Aedes mosquito species were captured; Aedes aegypti 83(66.94%), Aedes albopictus 33(26.61%), Aedes simpsoni (4.48%), Aedes luteocephalus (≤1%) and Aedes vittatus (≤1%). Nsukka autonomous community had higher species diversity than Obimo. Allele specific amplification confirmed dengue vectors, Aedes aegypti and Aedes albopictus species on a 2% agarose gel. Since the most recent re-emergence of arboviral diseases is closely associated with Aedes species, findings of this study, therefore, give further evidence about the presence of potential arboviral vectors in Nigeria and describe the role of a simple PCR in discriminating some. Further entomological studies should integrate PCR assays in mosquito vector surveillance.


2020 ◽  
Vol 20 ◽  
Author(s):  
Helen Shiphrah Vethakanraj ◽  
Niveditha Chandrasekaran ◽  
Ashok Kumar Sekar

: Acid ceramidase (AC), the key enzyme of the ceramide metabolic pathway hydrolyzes pro-apoptotic ceramide to sphingosine, which by the action of sphingosine-1-kinase is metabolized to mitogenic sphingosine-1-phosphate. The intracellular level of AC determines ceramide/sphingosine-1-phosphate rheostat which in turn decides the cell fate. The upregulated AC expression during cancerous condition acts as a “double-edged sword” by converting pro-apoptotic ceramide to anti-apoptotic sphingosine-1-phosphate, wherein on one end, the level of ceramide is decreased and on the other end, the level of sphingosine-1-phosphate is increased, thus altogether aggravating the cancer progression. In addition, cancer cells with upregulated AC expression exhibited increased cell proliferation, metastasis, chemoresistance, radioresistance and numerous strategies were developed in the past to effectively target the enzyme. Gene silencing and pharmacological inhibition of AC sensitized the resistant cells to chemo/radiotherapy thereby promoting cell death. The core objective of this review is to explore AC mediated tumour progression and the potential role of AC inhibitors in various cancer cell lines/models.


The ICRC Library is home to unique collections retracing the parallel development of humanitarian action and law during the past 150+ years. With the core of these collections now digitized, this reference library on international humanitarian law (IHL) and the International Committee of the Red Cross (ICRC) is a resource available to all, anytime, anywhere.


Author(s):  
A. Wilder-Smith

Abstract Purpose of review The COVID-19 pandemic poses a major global health threat. The rapid spread was facilitated by air travel although rigorous travel bans and lockdowns were able to slow down the spread. How does COVID-19 compare with other emerging viral diseases of the past two decades? Recent findings Viral outbreaks differ in many ways, such as the individuals most at risk e.g. pregnant women for Zika and the elderly for COVID-19, their vectors of transmission, their fatality rate, and their transmissibility often measured as basic reproduction number. The risk of geographic spread via air travel differs significantly between emerging infectious diseases. Summary COVID-19 is not associated with the highest case fatality rate compared with other emerging viral diseases such as SARS and Ebola, but the combination of a high reproduction number, superspreading events and a globally immunologically naïve population has led to the highest global number of deaths in the past 20 decade compared to any other pandemic.


2016 ◽  
Vol 49 (3) ◽  
pp. 243-254 ◽  
Author(s):  
Timofey Agarin ◽  
Miķelis Grīviņš

The paper investigates the dynamics and volution of issues on the agenda of Baltic environmental non-governmental organisations (NGOs) since the collapse of communism. The past research on Baltic environment activism suggests that these enjoy high visibility because they tapped the core societal views of natural environment as a crucial asset of a nation. As we demonstrate in this paper, the changes in agendas of Baltic environmental non-governmental organisations (ENGOs) make clear that the rhetorical toolbox of ‘national environment’ is often used to mainly achieve greater financial gains for individual members, rather than for society at large. We illustrate how the dearth of economic opportunities for domestic public has impacted perceptions of ‘nature’ advocated by the environmental activists, focussing specifically on national perceptions of ownership and the resulting actions appropriating ‘nature’ as a source for economic development, only tangentially attaining environmental outcomes on the way. The vision that the ‘environment’ is an economic resource allowed ENGO activists to cooperate with the domestic policymaking, while tapping international networks and donors for funding. Throughout the past decades they worked to secure their own and their members’ particularistic economic interests and, as we demonstrate, remained disengaged from the political process and failed to develop broader reproach with publics.


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