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2021 ◽  
Author(s):  
Erika Santamaria ◽  
Marco Súarez ◽  
Ricardo Ortiz Gallego ◽  
Patricia Fuya ◽  
Geraldine Páez ◽  
...  

The collection of insects of medical importance from the National Institute of Health (Colombia) INS, was started in 1934 with the aim of being an institutional and national repository of the biodiversity of insects involved in vector-borne diseases of importance in public health. Today, the entomological collection includes more than 7.500 specimens. The ceratopogonids insects are one of the Groups of Diptera that conform this collection. Within the Ceratopogonidae family, are the insects of the genera Culicoides which are relevant in public health because of the nuisance caused by their bites when they are presented in great abundance and because of their role as transmitters of several agents (virus, protozoa and nematodes) that causes diseases to the humans and to the animals (Mullen 2002, Kettle 1995). Brief of the Ceratopogonidae insects (Diptera: Ceratopogonidae) found in the collection, is presented here. A total of 801 individuals of this family rest in the collection, mainly adult of the genus Culicoides (90%). The collection is the result of the effort of several researchers through the history of the Group of Entomology (INS). These researchers collected ceratopogonids when they went to different transmission scenarios of the vector-borne diseases in Colombia, with the purpose of making the entomological characterizations. The effort of the researchers also included the processing, assembly, and identification of the specimens in the laboratory. New information about the geographical distribution of 39 species of the genera Culicoides appears for Colombia.


2021 ◽  
Vol 379 (4) ◽  
Author(s):  
Guillermo Moreno-Alcántar ◽  
Alessandro Aliprandi ◽  
Luisa De Cola

Abstract The discovery of aggregation-induced electrochemiluminescence (AIECL) in 2017 opened new research paths in the quest for novel, more efficient emitters and platforms for biological and environmental sensing applications. The great abundance of fluorophores presenting aggregation-induced emission in aqueous media renders AIECL a potentially powerful tool for future diagnostics. In the short time following this discovery, many scientists have found the phenomenon interesting, with research findings contributing to advances in the comprehension of the processes involved and in attempts to design new sensing platforms. Herein, we explore these advances and reflect on the future directions to take for the development of sensing devices based on AIECL. Graphic abstract


2021 ◽  
Vol 4 (2) ◽  
pp. 129-135
Author(s):  
Meryem Birrou ◽  
Mina Agrou ◽  
Hasnae Guerrouj ◽  
Rabia Bayahia ◽  
Loubna Benamar

We report a case of a peritoneal-pericardial leak in peritoneal dialysis.A 19-year-old patient, with no history of heart disease, with unkown chronic kidney disease, treated with continuous ambulatory peritoneal dialysis (CAPD) for 10 months. complained of chest pain and tachycardia, revealing pericardial effusion of great abundance. Pericardial drainage was necessary. The fluid analysis was a transudate with glucose levels 5 times higher than glucose plasma levels. A peritoneal scintigraphy was performed and showed a distribution of the radio-tracer in the peritoneal cavity without any image of a leak. With clinical and especillay biological arguments, the patient was diagnosed with a peritoneal-pericardial leak.After pericardial drainage and temporary switch to hemodialysis, automated peritoneal dialysis was resumed with progressive increase in volumes, without recurrence of the leak after a 6 months follow-up.


Insects ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 77
Author(s):  
Michael G. Sergeev

The main aims of this paper are to reveal general patterns of Orthoptera distribution in the Eurasian steppes, to evaluate long-term trends of changes in distribution of taxa and populations, and to estimate the potential for population changes relative to human activity and global warming trends. The main publications concerning diversity and distribution of these insects over the steppes are analyzed. The fauna of the Eurasian steppes includes more than 440 species of Orthoptera. The general distribution of grasshoppers and their kin in the Eurasian steppes reflects their common associations with different grasslands. The species richness increases from the relatively cold forest-steppes to the semi-deserts with their warm summer. There are some endemic or subendemic taxa, including the tribe Onconotini (Tettigoniidae). The populations’ distribution of Orthoptera is also analyzed. The populations of native Orthoptera extend through all the herbaceous landscapes. Under these conditions, the interrelating of colonies of each species may result in great abundance. The population distribution of three species locusts (Locusta migratoria, Calliptamus italicus, Dociostaurus maroccanus) is also discussed. Some notable changes of their populations’ distribution and dynamics are characterized. The situation with rare Orthoptera is estimated. Retrospective and prospective of the steppe fauna of Orthoptera are discussed.


2020 ◽  
Author(s):  
Michael J Tisza ◽  
Anna K Belford ◽  
Guillermo Dominguez-Huerta ◽  
Benjamin Bolduc ◽  
Christopher B Buck

Abstract Viruses, despite their great abundance and significance in biological systems, remain largely mysterious. Indeed, the vast majority of the perhaps hundreds of millions of viral species on the planet remain undiscovered. Additionally, many viruses deposited in central databases like GenBank and RefSeq are littered with genes annotated as “hypothetical protein” or the equivalent. Cenote-Taker 2, a virus discovery and annotation tool available on command line and with a graphical user interface with free high-performance computation access, utilizes highly sensitive models of hallmark virus genes to discover familiar or divergent viral sequences from user-input contigs. Additionally, Cenote-Taker 2 uses a flexible set of modules to automatically annotate the sequence features of contigs, providing more gene information than comparable tools. The outputs include readable and interactive genome maps, virome summary tables, and files that can be directly submitted to GenBank. We expect Cenote-Taker 2 to facilitate virus discovery, annotation, and expansion of the known virome.


Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1614
Author(s):  
David Valero ◽  
Carlos Rico ◽  
Raul Tapia-Tussell ◽  
Liliana Alzate-Gaviria

Corn is one of the main food products in Mexico. The elaboration of corn-derived products generates wastewater with a high organic load (nejayote). Anaerobic digestion is an indicated treatment for wastewater with high organic loads. The results of this study show that the application of microaeration in the hydrolysis-fermentative reactor increased the percentage of volatile fatty acids (VFA) available in the medium by 62%. The addition of a conductive material, such as granulated activated carbon (GAC), promotes DIET (Direct interspecies electrons transfer) in the methanogenic UASB reactor increasing the methane yield by 55%. Likewise, a great diversity of exoelectrogenic bacteria, with the ability to donate electrons DIET mechanisms, were developed in the GAC biofilm, though interestingly, Peptoclostridium and Clostridium (17.3% and 12.75%, respectively) were detected with a great abundance in the GAC biofilm. Peptoclostridium has not been previously reported as a participant in DIET process.


2020 ◽  
Vol 24 ◽  
pp. 153-168
Author(s):  
Giacomo Ponticelli

The view from ‘pre-Crusader’ Shawbak: towards a first contextualization through GIS visibility and spatial analyses The purpose of this study is to provide a first preliminary interpretation of part of the evidence from Shawbak castle which attests to the presence of a ‘pre-Crusader, probably Byzantine fort. The strategic features of the location of the fort, in particular a great abundance of water resources, made it indeed strategically advantageous during the Crusader period and in the later Ayyubid and Mamluk periods. Stratigraphic evidence from readings of extant buildings and excavations revealed that the first Crusader foundation of the castle was laid out upon the remains of a LateRoman/Byzantine fortification identified in different parts of the castle. The presence of such fortification should probably be considered contextual to the presence of major forts and potential watchtower sites that have been documented by previous surveys in the area, in particular, a system of strategic locations depending on the castellum of Da’janiya betweenthe Desert highway to the east and the Via Nova Traiana to the west. The need to protect the fertile strip of land east of Shawbak and the natural resources of the area might have required a system of visual control attested to in other nearby regions, which could have involved a signaling network in communication with Shawbak. In this paper, a series of visibility analyses are proposed in order to demonstrate that such system could have worked for Byzantine Shawbak.


Viruses ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 1091
Author(s):  
Santiago Hernández ◽  
Martha J. Vives

Since the discovery of phages in 1915, these viruses have been studied mostly in aerobic systems, or without considering the availability of oxygen as a variable that may affect the interaction between the virus and its host. However, with such great abundance of anaerobic environments on the planet, the effect that a lack of oxygen can have on the phage-bacteria relationship is an important consideration. There are few studies on obligate anaerobes that investigate the role of anoxia in causing infection. In the case of facultative anaerobes, it is a well-known fact that their shifting from an aerobic environment to an anaerobic one involves metabolic changes in the bacteria. As the phage infection process depends on the metabolic state of the host bacteria, these changes are also expected to affect the phage infection cycle. This review summarizes the available information on phages active on facultative and obligate anaerobes and discusses how anaerobiosis can be an important parameter in phage infection, especially among facultative anaerobes.


Author(s):  
Michael J. Tisza ◽  
Anna K. Belford ◽  
Guillermo Dominguez-Huerta ◽  
Benjamin Bolduc ◽  
Matthew B. Sullivan ◽  
...  

AbstractViruses, despite their great abundance and significance in biological systems, remain largely mysterious. Indeed, the vast majority of the perhaps hundreds of millions of viral species on the planet remain undiscovered. Additionally, many viruses deposited in central databases like GenBank and RefSeq are littered with genes annotated as “hypothetical protein” or the equivalent. Cenote-Taker2, a virus discovery and annotation tool available on command line and with a graphical user interface with free high-performance computation access, utilizes highly sensitive models of hallmark virus genes to discover familiar or divergent viral sequences from user-input contigs. Additionally, Cenote-Taker2 uses a flexible set of modules to automatically annotate the sequence features of contigs, providing more gene information than comparable tools. The outputs include readable and interactive genome maps, virome summary tables, and files that can be directly submitted to GenBank. We expect Cenote-Taker2 to facilitate virus discovery, annotation, and expansion of the known virome.


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