scholarly journals A re-evaluation of the Chaetothyriales using criteria of comparative biology

2020 ◽  
Vol 103 (1) ◽  
pp. 47-85
Author(s):  
Yu Quan ◽  
Lucia Muggia ◽  
Leandro F. Moreno ◽  
Meizhu Wang ◽  
Abdullah M. S. Al-Hatmi ◽  
...  
Keyword(s):  
Competitive Ability ◽  
Opportunistic Infections ◽  
Comparative Biology ◽  
Morphological Classification ◽  
Brownian Motion Model ◽  
Vertebrate Hosts ◽  
Time Of Divergence ◽  
Conventional Systems ◽  
Character Mapping ◽  
Ancestral Character States

Abstract Chaetothyriales is an ascomycetous order within Eurotiomycetes. The order is particularly known through the black yeasts and filamentous relatives that cause opportunistic infections in humans. All species in the order are consistently melanized. Ecology and habitats of species are highly diverse, and often rather extreme in terms of exposition and toxicity. Families are defined on the basis of evolutionary history, which is reconstructed by time of divergence and concepts of comparative biology using stochastical character mapping and a multi-rate Brownian motion model to reconstruct ecological ancestral character states. Ancestry is hypothesized to be with a rock-inhabiting life style. Ecological disparity increased significantly in late Jurassic, probably due to expansion of cytochromes followed by colonization of vacant ecospaces. Dramatic diversification took place subsequently, but at a low level of innovation resulting in strong niche conservatism for extant taxa. Families are ecologically different in degrees of specialization. One of the clades has adapted ant domatia, which are rich in hydrocarbons. In derived families, similar processes have enabled survival in domesticated environments rich in creosote and toxic hydrocarbons, and this ability might also explain the pronounced infectious ability of vertebrate hosts observed in these families. Conventional systems of morphological classification poorly correspond with recent phylogenetic data. Species are hypothesized to have low competitive ability against neighboring microbes, which interferes with their laboratory isolation on routine media. The dataset is unbalanced in that a large part of the extant biodiversity has not been analyzed by molecular methods, novel taxonomic entities being introduced at a regular pace. Our study comprises all available species sequenced to date for LSU and ITS, and a nomenclatural overview is provided. A limited number of species could not be assigned to any extant family.

TBE in Estonia

2019 ◽  
Author(s):  
Kuulo Kutsar
Keyword(s):  
Endemic Area ◽  
Endemic Country ◽  
Tick Borne Encephalitis ◽  
Vertebrate Hosts

The first cases of tick-borne encephalitis (TBE) in Estonia were identified in 1949. Today, Estonia is a TBE-endemic country. A TBE-endemic area in Estonia is defined as an area with circulation between ticks and vertebrate hosts as determined by detection of TBEV or the demonstration of autochthonous infections in humans or animals within the last 20 years.

In Shortly about HIV and AIDS

2020 ◽  
Vol 2020 ◽  
Author(s):  
Sinisa Franjic
Keyword(s):  
Opportunistic Infections ◽  
Hiv And Aids ◽  
The Body ◽  
Hiv Disease ◽  
Infected Person ◽  
Defense System ◽  
Infected Mother ◽  
Unprotected Sexual Intercourse ◽  
Hiv Virus ◽  
Immunodeficiency Virus

HIV is a human immunodeficiency virus, a retrovirus that causes AIDS in the event of untreated infection. The virus causes the weakness and inability of the organism's defense system. HIV disease is a chronic progressive process that begins with the onset of HIV virus into the body, and over time (in adults over 10 years), a gradual destruction of the immune system occurs. The host during the infection becomes vulnerable and is suffering from complications of opportunistic infections and malignancies. A person infected with HIV feels good until developing AIDS, does not notice any changes in health, and has no specific external signs of infection. The only way to detect infection at this stage is HIV testing. HIV is transmitted: unprotected sexual intercourse with the infected person, exchange of needles, syringes or accessories with infected persons when taking drugs, with infected mother on her baby before, during or after delivery (breastfeeding).

Assessing the competitiveness of the resort area

2020 ◽  
Vol 18 (7) ◽  
pp. 1216-1231
Author(s):  
K.A. Nefedova ◽  
D.O. Maslakova
Keyword(s):  
Comparative Analysis ◽  
Competitive Ability ◽  
Effective Management ◽  
Development Indicators ◽  
Ski Resort ◽  
Ski Resorts ◽  
Ranking Score ◽  
Comprehensive Development ◽  
Differential Methods

Subject. This article discusses the issues of development of the Krasnaya Polyana resort area. Objectives. The article aims to assess the competitive ability and attractiveness of this resort area through developing indicators. Methods. For the study, we used a comparative analysis, and factor and ranking score techniques. Results. The article offers original methods to assess the competitiveness of the ski resort area and describes possible directions to increase and improve the competitiveness and attractiveness of ski resorts. Conclusions. Comprehensive development indicators help assess the competitive ability of the ski resort area. Modified expert, sociological, rating, and differential methods contribute to the effective management of the resort area's advantages.

Bioactivity of Phenolic Compounds Extracted from Strawberry against Formation of Pseudomonas aeruginosa Biofilm

2019 ◽  
Vol 10 (01) ◽  
Author(s):  
Baydaa Hussein ◽  
Zainab A. Aldhaher ◽  
Shahrazad Najem Abdu-Allah ◽  
Adel Hamdan
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Phenolic Compounds ◽  
Biofilm Formation ◽  
Opportunistic Infections ◽  
Formation Rate ◽  
Hydrocarbon Chain ◽  
Health Concern ◽  
Gas Chromatography Mass Spectrometry ◽  
Phenolic Contents

Background: Biofilm is a bacterial way of life prevalent in the world of microbes; in addition to that it is a source of alarm in the field of health concern. Pseudomonas aeruginosa is a pathogenic bacterium responsible for all opportunistic infections such as chronic and severe. Aim of this study: This paper aims to provide an overview of the promotion of isolates to produce a biofilm in vitro under special circumstances, to expose certain antibiotics to produce phenotypic evaluation of biofilm bacteria. Methods and Materials: Three diverse ways were used to inhibited biofilm formation of P.aeruginosa by effect of phenolic compounds extracts from strawberries. Isolates produced biofilm on agar MacConkey under certain circumstances. Results: The results showed that all isolates were resistant to antibiotics except sensitive to azithromycin (AZM, 15μg), and in this study was conducted on three ways to detect the biofilm produced, has been detected by the biofilm like Tissue culture plate (TCP), Tube method (TM), Congo Red Agar (CRA). These methods gave a clear result of these isolates under study. Active compounds were analyzed in both extracts by Gas Chromatography-mass Spectrometry which indicate High molecular weight compound with a long hydrocarbon chain. Conclusion: Phenolic compounds could behave as bioactive material and can be useful to be used in pharmaceutical synthesis. Phenolic contents which found in leaves and fruits extracts of strawberries shows antibacterial activity against all strains tested by the ability to reduce the production of biofilm formation rate.

Spectrum of opportunistic infections in relation to CD4 count in HIV-2 patients

2019 ◽  
Vol 12 (3) ◽  
pp. 137-141
Author(s):  
Kashmira Rajendra Hajare ◽  
◽  
Priya Patil ◽  
Rahul Kadu ◽  
◽  
...  
Keyword(s):  
Opportunistic Infections ◽  
Cd4 Count

As Nascentes como Fonte de Abastecimento de Populações Rurais Difusas (The Springs as Supply Source of Rural Diffuse Population)

2012 ◽  
Vol 4 (5) ◽  
pp. 974
Author(s):  
Ricardo Augusto Pessôa Braga
Keyword(s):  
Escherichia Coli ◽  
Basic Needs ◽  
Supply Source ◽  
Rural Villages ◽  
Family Farmers ◽  
Farming Families ◽  
Water Springs ◽  
Conventional Systems ◽  
The City ◽  
Perennial Springs

A universalização do abastecimento de água no Brasil ainda é um desafio que se busca suplantar, sobretudo em relação ao atendimento a populações rurais difusas, onde os sistemas convencionais não respondem às demandas das famílias de agricultores dispersas. Nesse contexto, as nascentes de água podem contribuir como solução alternativa para o abastecimento doméstico, por se encontrarem próximas ao consumo e sob o controle do usuário Isto é evidenciado no estudo das nascentes situadas no Assentamento Serra Grande, no município de Vitória de Santo Antão, Zona da Mata de Pernambuco. Foram identificadas, cadastradas e selecionadas nascentes perenes, para caracterização da qualidade e vazão das águas, objetivando avaliá-las para usos múltiplos, com prioridade ao abastecimento doméstico. Evidenciou-se que a vazão, mesmo em períodos de estiagem, possui potencial de atender às necessidades básicas dos agricultores, para beber, preparo de alimentos, banho, lavagem de utensílios e roupas e descarga em sanitários. Quanto à qualidade para uso doméstico, em geral a água atende aos limites sanitários, embora em alguns casos a presença de Escherichia coli exija recuperação da nascente e cloração cuidadosa da água. Pelos resultados, a produção de água em nascentes situadas em solos e clima predominantes na Zona da Mata do Nordeste brasileiro, permite atender às necessidades básicas de abastecimento doméstico de agricultores familiares isolados ou em pequenas vilas rurais, sendo uma alternativa aos sistemas convencionais de abastecimento, já identificada pelo governo federal em seus recentes planos de abastecimento de populações rurais difusas. Palavras-chave: recursos hídricos; gestão ambiental; desenvolvimento rural  The Springs as Supply Source of Rural Diffuse Population  ABSTRACTThe universalization of the water supply in Brazil is still a challenge that it seeks to be supplant, especially in relation to the service to rural diffuse population, where conventional systems do not respond to the demands of farming families dispersed. In this context, the water springs may contribute as a workaround for domestic supply, because they are close to consumption and under user control. This is evidenced in the study of springs located at Settlement Serra Grande, located in the city of Vitória de Santo Antão, Zona da Mata de Pernambuco. It has been identified, registered and selected perennial springs, to characterize the quality and water flow, aiming to evaluate them for multiple uses with priority to domestic supply. It was evident that the flow even during drought periods, has potential to meet the basic needs of farmers, for drinking, preparing meals, baths, wash utensils and clothes and flushing toilets. As for the quality for home use, generally water meets health limits although in some cases the presence of Escherichia coli, requires careful recovery of the source and chlorination of water. According to the results, the production of water in springs located in soils and climate prevailing in Zona da Mata of Brazilian northeastern, it allows to meet basic needs for domestic supply from family farmers in small villages or isolated rural villages, being an alternative to conventional supply, already identified by the federal government in their recent plans for the supply of rural diffuse population.  Keywords: water resources; environmental management; rural development

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