Advances in applied microbiology最新文献_第10页

Role and regulation of the stress activated sigma factor sigma B (σ^B) in the saprophytic and host-associated life stages of Listeria monocytogenes. 应激激活因子σB (σB)在单核增生李斯特菌腐生和寄主相关生命阶段的作用与调控

2区生物学

Advances in applied microbiology Pub Date : 2019-01-01 Epub Date: 2018-12-24 DOI: 10.1016/bs.aambs.2018.11.001

Amber Dorey, Catarina Marinho, Pascal Piveteau, Conor O'Byrne

{"title":"Role and regulation of the stress activated sigma factor sigma B (σB) in the saprophytic and host-associated life stages of Listeria monocytogenes.","authors":"Amber Dorey, Catarina Marinho, Pascal Piveteau, Conor O'Byrne","doi":"10.1016/bs.aambs.2018.11.001","DOIUrl":"https://doi.org/10.1016/bs.aambs.2018.11.001","url":null,"abstract":"The stress activated sigma factor sigma B (σB) plays a pivotal role in allowing the food-borne bacterial pathogen Listeria monocytogenes to modulate its transcriptional landscape in order to survive in a variety of harsh environments both outside and within the host. While we have a comparatively good understanding of the systems under the control of this sigma factor much less is known about how the activity of σB is controlled. In this review, we present a current model describing how this sigma factor is thought to be controlled including an overview of what is known about stress sensing and the early signal transduction events that trigger its activation. We discuss the known regulatory overlaps between σB and other protein and RNA regulators in the cell. Finally, we describe the role of σB in surviving both saprophytic and host-associated stresses. The complexity of the regulation of this sigma factor reflects the significant role that it plays in the persistence of this important pathogen in the natural environment, the food chain as well as within the host during the early stages of an infection. Understanding its regulation will be a critical step in helping to develop rational strategies to prevent its growth and survival in the food destined for human consumption and in the prevention of listeriosis.","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/bs.aambs.2018.11.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37168593","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 42

Contributors 贡献者

2区生物学

Advances in applied microbiology Pub Date : 2019-01-01 DOI: 10.1016/s0065-2164(19)30008-5

引用次数: 0

Contributors 贡献者

2区生物学

Advances in applied microbiology Pub Date : 2019-01-01 DOI: 10.1016/s0065-2164(19)30046-2

引用次数: 0

Siderophores: From natural roles to potential applications. 铁载体:从自然作用到潜在应用。

2区生物学

Advances in applied microbiology Pub Date : 2019-01-01 Epub Date: 2019-01-29 DOI: 10.1016/bs.aambs.2018.12.001

Magdalena Albelda-Berenguer, Mathilde Monachon, Edith Joseph

引用次数: 54

Biological oxidation of iron sulfides. 硫化铁的生物氧化。

2区生物学

Advances in applied microbiology Pub Date : 2019-01-01 Epub Date: 2019-02-14 DOI: 10.1016/bs.aambs.2018.12.002

Mathilde Monachon, Magdalena Albelda-Berenguer, Edith Joseph

{"title":"Biological oxidation of iron sulfides.","authors":"Mathilde Monachon, Magdalena Albelda-Berenguer, Edith Joseph","doi":"10.1016/bs.aambs.2018.12.002","DOIUrl":"https://doi.org/10.1016/bs.aambs.2018.12.002","url":null,"abstract":"The biological oxidation of minerals and ores, called bioleaching, has been studied for the last decades to solubilize metals and recover them. In particular, iron sulfides are the most studied ores for an optimum extraction of different metals, such as copper or zinc. The use of chemolithotrophic bacteria, as Acidothiobacillus ferrooxidans, to oxidize both iron and sulfur species in aerobic conditions and at acidic pH shows promising results. In the field of heritage preservation, the development of \"green\" treatments is more and more studied. Waterlogged archeological wood presents an accumulation of iron sulfides within its structure, which, after exposition to oxygen, lead to salt precipitation and acidification and so to the degradation of the wooden artifact. A new extraction method, based on the dissolution of iron sulfides by the use of bacteria could be an alternative to the current chemical extraction methods, as being more respectful and ecological. While A. ferrooxidans is very effective in mines and groundwater, in the field of conservation-restoration of wood, Thiobacillus denitrificans is a better candidate as it grows at neutral pH, which is less aggressive for organic substrates (wood here). Preliminary studies show the efficiency of T. denitrificans for the dissolution of iron sulfides, as the concentration of nitrates used as electron donors decreases while the concentration of sulfates produced increases without degrading the wooden matrix. Long-term behavior should be studied to assess the stability of the artifacts after treatment.","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/bs.aambs.2018.12.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37273341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16

Nitrogen cycling during wastewater treatment. 污水处理过程中的氮循环。

2区生物学

Advances in applied microbiology Pub Date : 2019-01-01 Epub Date: 2018-12-10 DOI: 10.1016/bs.aambs.2018.10.003

Dawn E Holmes, Yan Dang, Jessica A Smith

{"title":"Nitrogen cycling during wastewater treatment.","authors":"Dawn E Holmes, Yan Dang, Jessica A Smith","doi":"10.1016/bs.aambs.2018.10.003","DOIUrl":"https://doi.org/10.1016/bs.aambs.2018.10.003","url":null,"abstract":"Many wastewater treatment plants in the world do not remove reactive nitrogen from wastewater prior to release into the environment. Excess reactive nitrogen not only has a negative impact on human health, it also contributes to air and water pollution, and can cause complex ecosystems to collapse. In order to avoid the deleterious effects of excess reactive nitrogen in the environment, tertiary wastewater treatment practices that ensure the removal of reactive nitrogen species need to be implemented. Many wastewater treatment facilities rely on chemicals for tertiary treatment, however, biological nitrogen removal practices are much more environmentally friendly and cost effective. Therefore, interest in biological treatment is increasing. Biological approaches take advantage of specific groups of microorganisms involved in nitrogen cycling to remove reactive nitrogen from reactor systems by converting ammonia to nitrogen gas. Organisms known to be involved in this process include autotrophic ammonia-oxidizing bacteria, heterotrophic ammonia-oxidizing bacteria, ammonia-oxidizing archaea, anaerobic ammonia oxidizing bacteria (anammox), nitrite-oxidizing bacteria, complete ammonia oxidizers, and dissimilatory nitrate reducing microorganisms. For example, in nitrifying-denitrifying reactors, ammonia- and nitrite-oxidizing bacteria convert ammonia to nitrate and then denitrifying microorganisms reduce nitrate to nonreactive dinitrogen gas. Other nitrogen removal systems (anammox reactors) take advantage of anammox bacteria to convert ammonia to nitrogen gas using NO as an oxidant. A number of promising new biological treatment technologies are emerging and it is hoped that as the cost of these practices goes down more wastewater treatment plants will start to include a tertiary treatment step.","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/bs.aambs.2018.10.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37168595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 80

Contributors 贡献者

2区生物学

Advances in applied microbiology Pub Date : 2019-01-01 DOI: 10.1016/s0065-2164(19)30033-4

引用次数: 0

Microbes associated with fresh produce: Sources, types and methods to reduce spoilage and contamination. 与新鲜农产品有关的微生物:来源、类型和减少腐败和污染的方法。

2区生物学

Advances in applied microbiology Pub Date : 2019-01-01 Epub Date: 2019-03-13 DOI: 10.1016/bs.aambs.2019.02.001

Maciej Kaczmarek, Simon V Avery, Ian Singleton

{"title":"Microbes associated with fresh produce: Sources, types and methods to reduce spoilage and contamination.","authors":"Maciej Kaczmarek, Simon V Avery, Ian Singleton","doi":"10.1016/bs.aambs.2019.02.001","DOIUrl":"https://doi.org/10.1016/bs.aambs.2019.02.001","url":null,"abstract":"Global food security remains one of the most important challenges that needs to be addressed to ensure the increasing demand for food of the fast growing human population is satisfied. Fruits and vegetables comprise an essential component of a healthy balanced diet as they are the major source of both macro- and micronutrients. They are particularly important for communities in developing countries whose nutrition often relies solely on a plant-based diet. Recent advances in agriculture and food processing technologies have facilitated production of fresh, nutritious and safe food for consumers. However, despite the development of sophisticated chemical and physical methods of food and equipment disinfection, fresh-cut produce and fruit juice industry still faces significant economic losses due to microbial spoilage. Furthermore, fresh produce remains an important source of pathogens that have been causing outbreaks of human illness worldwide. This chapter characterizes common spoilage and human pathogenic microorganisms associated with fresh-cut produce and fruit juice products, and discusses the methods and technology that have been developed and utilized over the years to combat them. Substantial attention is given to highlight advantages and disadvantages of using these methods to reduce microbial spoilage and their efficacy to eliminate human pathogenic microbes associated with consumption of fresh-cut produce and fruit juice products.","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/bs.aambs.2019.02.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37274789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 43

Toward rational selection criteria for selection of probiotics in pigs. 探讨猪体内益生菌的合理选择标准。

2区生物学

Advances in applied microbiology Pub Date : 2019-01-01 Epub Date: 2019-04-12 DOI: 10.1016/bs.aambs.2019.03.003

Weilan Wang, Michael Gänzle

{"title":"Toward rational selection criteria for selection of probiotics in pigs.","authors":"Weilan Wang, Michael Gänzle","doi":"10.1016/bs.aambs.2019.03.003","DOIUrl":"https://doi.org/10.1016/bs.aambs.2019.03.003","url":null,"abstract":"An accurate understanding of properties of probiotics is a prerequisite for selecting probiotic organisms for use in swine production. This review aims to review selection criteria for probiotic organism in swine. The systematically investigated ecological history rather than the source of isolates should be regarded as the natural origin of probiotic strains, which helps to correct the inconsistencies arising from incorrect identification of the source. Moreover, in vivo studies are suggested as follow-up assessment to validate the characteristics of probiotic predicted by in vitro experiments. In addition, the intended probiotic effect depends on the age of the animal and disease prevention in young animals may require different probiotic strains when compared to growth promotion in older animals. With adequate selection criteria, the inclusion of probiotic in feed supplementation is a promising way to exert positive effects on sows, newborns, weanling animals and grower-finisher pigs. Both host-adapted probiotics and nomadic probiotics can be applied for pathogen inhibition but host adapted organisms appear to have a different mode of action. Host-adapted probiotic strains are likely to be associated with exclusive colonization while the nomadic or environmental strain exert better immune stimulating functions. Strains with potent enzymatic activity are fitter for grower pigs favoring feed digestion and enhancing growth performance.","PeriodicalId":7298,"journal":{"name":"Advances in applied microbiology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/bs.aambs.2019.03.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"37274791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Copyright 版权

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Advances in applied microbiology Pub Date : 2019-01-01 DOI: 10.1016/s0065-2164(19)30044-9

引用次数: 0