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Feature Papers in Microbial Biology
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Feature Papers in Microbial Biology

A topical collection in Biology (ISSN 2079-7737). This collection belongs to the section "Microbiology".

Viewed by 1861

Editors

Prof. Dr. Pabulo H. Rampelotto

E-Mail Website
Collection Editor
Bioinformatics and Biostatistics Core Facility, Institute of Basic Health Sciences, Federal University of Rio Grande do Sul, Porto Alegre 91501-970, Brazil
Interests: microbiome; molecular microbiology; metagenomics; omics; biostatistics; next-generation sequencing; microbial ecology; bioinformatics; biotechnology; system biology; grand challenges
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Juan Carlos Gutiérrez

E-Mail Website
Collection Editor
Department of Genetics, Physiology and Microbiology, Faculty of Biology, Complutense University of Madrid, 28040 Madrid, Spain
Interests: microbial ecotoxicology; heavy metals; metallic nanoparticles; metallothioneins; gene expression regulation; biosensors; protozoa; ciliates
Special Issues, Collections and Topics in MDPI journals

Topical Collection Information

Dear Colleagues,

Microbiology is the fundamental biological science that studies microscopic organisms, including bacteria, archaea, protists, fungi and viruses. Understanding microbes' structure, life cycle, metabolism and growth is essential for further studies within various biological sciences, including genetics, ecology, evolution, health and biotechnology. Recent advances in microbiology, driven by cutting-edge technologies such as multi-omics and bioinformatics offer unprecedented potential to address major societal challenges. Scientists can now delve into previously unexplored questions, leading to breakthrough discoveries that highlight the crucial role of microbes in biology.

Our Topical Collection aims to showcase cutting-edge advances in microbial biology through a collection of feature papers that explore innovative work and rigorous scientific methodologies. Review articles are expected to synthesize ideas, challenge existing paradigms and establish new frameworks that advance our comprehension of the microbial world. We encourage researchers from related fields to submit their articles highlighting the latest developments in microbial biology, or to invite other relevant experts and colleagues to do so.

Prof. Dr. Pabulo H. Rampelotto
Prof. Dr. Juan Carlos Gutiérrez
Collection Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the collection website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Biology is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • antimicrobials
  • agricultural microbiology
  • biomining and bioremediation
  • clinical microbiology
  • environmental microbiology
  • food microbiology
  • geomicrobiology
  • host–microbe interaction
  • industrial microbiology
  • marine microbiology
  • microbial biochemistry
  • microbial biofilms
  • microbial biofuel and bioenergy
  • microbial biotechnology
  • microbial ecology
  • microbial evolution
  • microbial genetics
  • microbial metabolism
  • microbial omics
  • microbial pathogenesis
  • microbial physiology
  • pharmaceutical microbiology
  • probiotics
  • veterinary microbiology

Published Papers (4 papers)

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2024

15 pages, 9139 KiB  
Article
Comparative Analysis of the Gut Microbiota of Bat Species with Different Feeding Habits
by Diego Antonio Mena Canata, Mara Silveira Benfato, Francielly Dias Pereira, María João Ramos Pereira, Fernanda Schäfer Hackenhaar, Michele Bertoni Mann, Ana Paula Guedes Frazzon and Pabulo Henrique Rampelotto
Biology 2024, 13(6), 363; https://doi.org/10.3390/biology13060363 - 22 May 2024
Viewed by 160
Abstract
Bats are a diverse and ecologically important group of mammals that exhibit remarkable diversity in their feeding habits. These diverse feeding habits are thought to be reflected in the composition and function of their gut microbiota, which plays important roles in nutrient acquisition, [...] Read more.
Bats are a diverse and ecologically important group of mammals that exhibit remarkable diversity in their feeding habits. These diverse feeding habits are thought to be reflected in the composition and function of their gut microbiota, which plays important roles in nutrient acquisition, immune function, and overall health. Despite the rich biodiversity of bat species in South America, there is a lack of microbiome studies focusing on bats from this region. Such studies could offer major insights into conservation efforts and the preservation of biodiversity in South America. In this work, we aimed to compare the gut microbiota of four bat species with different feeding habits from Southern Brazil, including nectarivorous, frugivorous, insectivorous, and hematophagous bats. Our findings demonstrate that feeding habits can have a significant impact on the diversity and composition of bat gut microbiotas, with each species exhibiting unique metabolic potentials related to their dietary niches. In addition, the identification of potentially pathogenic bacteria suggests that the carriage of microbial pathogens by bats may vary, depending on feeding habits and host-specific factors. These findings provide novel insights into the relationship between bat feeding habits and gut microbiota composition, highlighting the need to promote diverse habitats and food sources to support these ecologically important species. Full article
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17 pages, 2716 KiB  
Article
Antibacterial and Antibiofilm Potential of Bacterial Cellulose Hydrogel Containing Vancomycin against Multidrug-Resistant Staphylococcus aureus and Staphylococcus epidermidis
by Ana Alice Venancio Correia, Luís André de Almeida Campos, Hanne Lazla Rafael de Queiroz Macêdo, Davi de Lacerda Coriolano, Maria Anndressa Alves Agreles, Danilo Elias Xavier, Rafaela de Siqueira Ferraz-Carvalho, José Lamartine de Andrade Aguiar and Isabella Macário Ferro Cavalcanti
Biology 2024, 13(5), 354; https://doi.org/10.3390/biology13050354 - 17 May 2024
Viewed by 385
Abstract
The present study aimed to evaluate the in vitro antibacterial and antibiofilm activity of bacterial cellulose hydrogel produced by Zoogloea sp. (HYDROGEL) containing vancomycin (VAN) against bacterial strains that cause wound infections, such as multidrug-resistant (MDR) Staphylococcus aureus and Staphylococcus epidermidis. Initially, [...] Read more.
The present study aimed to evaluate the in vitro antibacterial and antibiofilm activity of bacterial cellulose hydrogel produced by Zoogloea sp. (HYDROGEL) containing vancomycin (VAN) against bacterial strains that cause wound infections, such as multidrug-resistant (MDR) Staphylococcus aureus and Staphylococcus epidermidis. Initially, HYDROGEL was obtained from sugar cane molasses, and scanning electron microscopy (SEM) was performed to determine morphological characteristics. Then, VAN was incorporated into HYDROGEL (VAN-HYDROGEL). The antibacterial activity of VAN, HYDROGEL, and VAN-HYDROGEL was assessed using the broth microdilution method to determine the minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) against methicillin-sensitive S. aureus (MSSA) ATCC 25923, methicillin-resistant S. aureus (MRSA) ATCC 33591, S. epidermidis INCQS 00016 (ATCC 12228), five clinical isolates of MRSA, and nine clinical isolates of methicillin-resistant S. epidermidis, following the Clinical and Laboratory Standards Institute (CLSI) guidelines. Additionally, the antibacterial activity of VAN, HYDROGEL, and VAN-HYDROGEL was studied using the time-kill assay. Subsequently, the antibiofilm activity of VAN, HYDROGEL, and VAN-HYDROGEL was evaluated using crystal violet and Congo red methods, as well as SEM analysis. VAN and VAN-HYDROGEL showed bacteriostatic and bactericidal activity against MRSA and methicillin-resistant S. epidermidis strains. HYDROGEL did not show any antibacterial activity. Analysis of the time-kill assay indicated that HYDROGEL maintained the antibacterial efficacy of VAN, highlighting its efficiency as a promising carrier. Regarding antibiofilm activity, VAN and HYDROGEL inhibited biofilm formation but did not demonstrate biofilm eradication activity against methicillin-resistant S. aureus and S. epidermidis strains. However, it was observed that the biofilm eradication potential of VAN was enhanced after incorporation into HYDROGEL, a result also proven through images obtained by SEM. From the methods carried out in this study, it was possible to observe that HYDROGEL preserved the antibacterial activity of vancomycin, aside from exhibiting antibiofilm activity and enhancing the antibiofilm effect of VAN. In conclusion, this study demonstrated the potential of HYDROGEL as a candidate and/or vehicle for antibiotics against MDR bacteria that cause wound infections. Full article
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14 pages, 2627 KiB  
Article
Response Mechanism of cbbM Carbon Sequestration Microbial Community Characteristics in Different Wetland Types in Qinghai Lake
by Ni Zhang, Kelong Chen, Xinye Wang, Wei Ji, Ziwei Yang, Xia Wang and Junmin Li
Biology 2024, 13(5), 333; https://doi.org/10.3390/biology13050333 - 10 May 2024
Viewed by 306
Abstract
Carbon-sequestering microorganisms play an important role in the carbon cycle of wetland ecosystems. However, the response mechanism of carbon-sequestering microbial communities to wetland type changes and their relationship with soil carbon remain unclear. To explore these differences and identify the main influencing factors, [...] Read more.
Carbon-sequestering microorganisms play an important role in the carbon cycle of wetland ecosystems. However, the response mechanism of carbon-sequestering microbial communities to wetland type changes and their relationship with soil carbon remain unclear. To explore these differences and identify the main influencing factors, this study selected marsh wetlands, river wetlands and lakeside wetlands around Qinghai Lake as research subjects. High-throughput sequencing was employed to analyze the functional gene cbbM of carbon-sequestering microorganisms. The results revealed that the alpha diversity of cbbM carbon-sequestering microorganisms mirrored the trend in total carbon content, with the highest diversity observed in marsh wetlands and the lowest in lakeside wetlands. The dominant bacterial phylum was Proteobacteria, with prevalent genera including Thiothrix, Acidithiobacillus, and Thiodictyon. Acidithiobacillus served as a biomarker in lakeside wetlands, while two other genera were indicative of marsh wetlands. The hierarchical partitioning analysis indicated that the diversity of cbbM carbon-fixing microorganisms was primarily influenced by the total nitrogen content, while the community structure was significantly affected by the soil total carbon content. Moreover, an increased soil temperature and humidity were found to favor the carbon fixation processes of Thiomicrospira, Thiomonas, Polaromonas, and Acidithiobacillus. In summary, changes in wetland types seriously affected the characteristics of cbbM carbon sequestration in microbial communities, and a warm and humid climate may be conducive to wetland carbon sequestration. Full article
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21 pages, 10505 KiB  
Article
Cellular Response of Adapted and Non-Adapted Tetrahymena thermophila Strains to Europium Eu(III) Compounds
by Patricia Alonso, Javier Blas, Francisco Amaro, Patricia de Francisco, Ana Martín-González and Juan Carlos Gutiérrez
Biology 2024, 13(5), 285; https://doi.org/10.3390/biology13050285 - 23 Apr 2024
Viewed by 654
Abstract
Europium is one of the most reactive lanthanides and humans use it in many different applications, but we still know little about its potential toxicity and cellular response to its exposure. Two strains of the eukaryotic microorganism model Tetrahymena thermophila were adapted to [...] Read more.
Europium is one of the most reactive lanthanides and humans use it in many different applications, but we still know little about its potential toxicity and cellular response to its exposure. Two strains of the eukaryotic microorganism model Tetrahymena thermophila were adapted to high concentrations of two Eu(III) compounds (EuCl3 or Eu2O3) and compared to a control strain and cultures treated with both compounds. In this ciliate, EuCl3 is more toxic than Eu2O3. LC50 values show that this microorganism is more resistant to these Eu(III) compounds than other microorganisms. Oxidative stress originated mainly by Eu2O3 is minimized by overexpression of genes encoding important antioxidant enzymes. The overexpression of metallothionein genes under treatment with Eu(III) compounds supports the possibility that this lanthanide may interact with the -SH groups of the cysteine residues from metallothioneins and/or displace essential cations of these proteins during their homeostatic function. Both lipid metabolism (lipid droplets fusing with europium-containing vacuoles) and autophagy are involved in the cellular response to europium stress. Bioaccumulation, together with a possible biomineralization to europium phosphate, seems to be the main mechanism of Eu(III) detoxification in these cells. Full article
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