Article
Microbiology
Per Johansson, Elina Jaaskelainen, Elina Sade, Johanna Bjorkroth
Summary: During the study of spoilage microbiomes in packaged broiler meat, three unknown strains were isolated and identified as two novel species of the genus Vagococcus through polyphasic taxonomy and genome-based analyses. The phenotypic characteristics and chemotaxonomic properties of these novel species were typical for vagococci. Phenotypic and genetic differences distinguished them from previously known species in the genus. The proposed names for these novel species are Vagococcus proximus sp. nov. and Vagococcus intermedius sp. nov.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2023)
Article
Microbiology
Yajun Ge, Dong Jin, Xin-He Lai, Jing Yang, Shan Lu, Ying Huang, Han Zheng, Xiaoyan Zhang, Jianguo Xu
Summary: Two unknown Gram-stain-positive bacteria, MN-17(T) and MN-09, isolated from yaks faeces in the Qinghai-Tibet Plateau of China, belong to the genus Vagococcus and have been named Vagococcus zengguangii sp. They grow optimally at 37 degrees C and pH 7.0 in the presence of 0.5% NaCl.
JOURNAL OF MICROBIOLOGY
(2021)
Article
Microbiology
Sung-Min Kim, Yeong-Sik Byeon, Hong Lim Yang, In Seop Kim, Soon Dong Lee
Summary: This study used a polyphasic approach to determine the taxonomic positions of two novel strains isolated from larvae of an insect collected in Jeju, Republic of Korea, proposing them as two new species within the family Enterococcaceae.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2022)
Article
Microbiology
Dan Dan Liu, Yu Qin Li, Li Ping Zhang, Wei Ding, Wen Li Tian, Chun Tao Gu
Summary: Thirteen Gram-stain-positive bacterial strains were isolated from Chinese traditional pickle and the gut of honeybee (Apis mellifera), with 12 of them representing eight novel species. These novel species belong to the genera Apilactobacillus, Secundilactobacillus, Levilactobacillus, and Lacticaseibacillus, with each having a designated type strain.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2021)
Article
Microbiology
Shih-Ting Lin, Jia-Rong Guu, Hsing-Min Wang, Tomohiko Tamura, Koji Mori, Lina Huang, Koichi Watanabe
Summary: Five strains belonging to the genus Fructobacillus were isolated from paper mulberry in Taiwan. Phylogenetic analysis based on gene sequences showed that these strains represented four novel species. The proposed names for these species are Fructobacillus papyriferae sp. nov., Fructobacillus papyrifericola sp. nov., Fructobacillus broussonetiae sp. nov., and Fructobacillus parabroussonetiae sp. nov.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2022)
Article
Food Science & Technology
Sneh Punia Bangar, William Scott Whiteside, Arashdeep Singh, Fatih Ozogul, Antima Gupta, Suresh Kumar Gahlawat
Summary: This review summarizes the effects of sour starches on the physicochemical properties of starch, and discusses their potential applications in the food industry. The study found that sour starches have improved swelling, solubility, thermal stability, and resistance to hydrolysis compared to native starches. Fermentation process also increases the gelling potential and delays the aging of sour starches.
TRENDS IN FOOD SCIENCE & TECHNOLOGY
(2022)
Article
Microbiology
Katerina Roth, Yadwinder Singh Rana, Devin Daeschel, Jasna Kovac, Randy Worobo, Abigail B. Snyder
Summary: Six thermo-acidophilic, spore-forming strains were isolated from juice products, representing three novel species of Alicyclobacillus. These strains can grow aerobically in acidic and moderate thermal conditions, with only two of them capable of producing guaiacol.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2021)
Article
Microbiology
Juan Guzman, Anja Poehlein, Rolf Daniel, Peter Kaempfer, Andreas Vilcinskas
Summary: Strain G314FT, isolated from Lucilia sericata in Germany, belongs to the genus Vagococcus. It shows high sequence identity with Vagococcus bubulae, Vagococcus martis, and Vagococcus teuberi, indicating that it represents a new species of the genus. The genome of G314FT is the smallest among the closely related species and has differences in amino acid biosynthesis and carbohydrate metabolism.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2023)
Article
Microbiology
Dong-Wook Hyun, Euon Jung Tak, Pil Soo Kim, Jin-Woo Bae
Summary: A polyphasic taxonomic approach was used to characterize two novel bacterial strains, HDW17A(T) and HDW17B(T), isolated from the intestine of diving beetles. Phylogenetic and genomic analyses showed that the isolates belonged to the genus Vagococcus, with HDW17A(T) closely related to Vagococcus fessus and HDW17B(T) closely related to Vagococcus fluvialis. The strains were proposed as new species in the genus Vagococcus, named Vagococcus coleopterorum sp. nov. and Vagococcus hydrophili sp. nov.
JOURNAL OF MICROBIOLOGY
(2021)
Article
Microbiology
Hong Xia Zhang, Chun Tao Gu
Summary: Two Gram-stain-positive bacterial strains, 213-9(3)T and 30-1(2)T, isolated from traditional Chinese pickle, were characterized and compared using a polyphasic taxonomic approach. Molecular analysis and experimental tests were conducted to determine the phylogenetic relationships and distinguish the strains from closely related species.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Atena Sadat Sombolestani, Dries Bongaerts, Eliza Depoorter, Ilse Cleenwerck, Anneleen D. Wieme, Scott J. Britton, Stefan Weckx, Luc De Vuyst, Peter Vandamme
Summary: Polyphasic taxonomic and comparative genomic analyses revealed a novel species among acetic acid bacteria, named Brytella acorum gen. nov., sp. nov., represented by lambic beer isolates including strain LMG 32668T and the kombucha isolate LMG 32879. This species has Acidomonas methanolica as its closest phylogenomic neighbor and possesses metabolic characteristics typical of acetic acid bacteria. The absence of glycolysis pathway and the presence of both aerobic respiration and oxidative fermentation for energy metabolism are notable features. Antibiotic resistance genes and virulence factors are absent.
SYSTEMATIC AND APPLIED MICROBIOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Leandro S. Velez, Flavia F. Aburjaile, Antonio R. G. Farias, Ana D. B. Baia, Willams J. Oliveira, Adriano M. F. Silva, Ana M. Benko-Iseppon, Vasco Azevedo, Bertram Brenig, Jong H. Ham, Elineide B. Souza, Marco A. S. Gama
Summary: Genomic approaches were used to study two putative novel lineages of Burkholderia cenocepacia found in the semi-arid region of north-east Brazil causing onion sour skin. Whole genome sequencing and taxogenomic analysis revealed that these strains represent two novel species of the Bcc, named Burkholderia semiarida sp. nov. and Burkholderia sola sp. nov. The strains CCRMBC74T and CCRMBC51T were proposed as the type strains for these species.
SYSTEMATIC AND APPLIED MICROBIOLOGY
(2023)
Article
Microbiology
Jing Zhang, Yuechao Zhang, Rui Liu, Ruining Cai, Fanghua Liu, Chaomin Sun
Summary: The study identified a novel strain NS-1 isolated from a deep-sea cold seep in the South China Sea, which belongs to a new genus Iocasia fonsfrigidae based on phylogenetic analysis. NS-1 strain has the ability to metabolize multiple carbohydrates and produce fermentation products such as hydrogen. It is predicted that Iocasia sp. plays an ecological role in the cold seep microbial community by degrading various carbohydrates to produce small molecules for utilization by other members.
FRONTIERS IN MICROBIOLOGY
(2021)
Correction
Microbiology
Dong-Wook Hyun, Euon Jung Tak, Pil Soo Kim, Jin-Woo Bae
Summary: The description of the naming of the two bacteria strains in the article is incorrect and needs to be corrected.
JOURNAL OF MICROBIOLOGY
(2021)
Article
Microbiology
Ting Ting Li, Chun Tao Gu
Summary: Four Gram-stain-positive bacterial strains were isolated from the gut of honeybees in China, with three representing two novel species of the genus Lactobacillus. The strains were characterized using a polyphasic taxonomic approach, leading to the proposal of two new species: Lactobacillus huangpiensis and Lactobacillus laiwuensis.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2022)
Article
Microbiology
Joseph Wambui, Marc J. A. Stevens, Simon Sieber, Nicole Cernela, Vincent Perreten, Roger Stephan
Summary: In this study, the bacteriocin biosynthetic potential of the psychrophilic Clostridium estertheticum complex (CEC) was explored through genome mining and phenotypic screening. Twenty novel bacteriocin biosynthetic gene clusters (BBGC) were discovered, some of which showed antimicrobial activity against closely related clostridia species and clinically relevant pathogens.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Microbiology
Joseph Wambui, Marc J. A. Stevens, Nicole Cernela, Roger Stephan
Summary: The spoilage of vacuum-packed meat by Clostridium estertheticum complex (CEC) has been linked to the acetone-butyrate-ethanol fermentation, but the mechanism behind the variable gas production has not been fully elucidated. This study compares 50 CEC genomes from 11 CEC species to determine the genetic diversity and factors driving it. The analysis reveals that recombination and gene gain/loss events are important sources of natural variation within CEC, and the presence/absence of the hyp gene cluster is associated with variable gas production in meat.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Microbiology
Julia Isenring, Marc J. A. Stevens, Christoph Jans, Christophe Lacroix, Annelies Geirnaert
Summary: This study investigates the colonization process of Lactiplantibacillus plantarum in the in vitro colonic community, showing that colonization levels are dependent on the microbiota features rather than the introduction parameters. The study also demonstrates that the carrying capacity decreases over time and is correlated with richness and evenness. The findings provide important insights into colonizer-microbiota interactions and probiotic strategies.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Microbiology
Christoph Jans, Joseph Wambui, Marc J. A. Stevens, Taurai Tasara
Summary: Staphylococcus aureus infection has a significant impact on the health of both humans and animals in sub-Saharan Africa. The presence of S. aureus in dairy products is prevalent, but little is known about its population structure and genetic characteristics. This research revealed a high diversity of S. aureus strains in dairy products, indicating that milk serves as a reservoir for both human and animal strains. Additionally, a novel putative siderophore was discovered, suggesting possible horizontal gene transfer. These findings emphasize the importance of an integrative One Health approach in addressing S. aureus infections in animals and humans in sub-Saharan Africa.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Veterinary Sciences
Violaine Albane Colon, Kittitat Lugsomya, Hoi Kiu Lam, Lloyd Christian Wahl, Rebecca Sarah Victoria Parkes, Catherine Anne Cormack, Jule Anna Horlbog, Marc Stevens, Roger Stephan, Ioannis Magouras
Summary: This study investigated the prevalence and serotype diversity of Salmonella in turtles sold in wet markets in Hong Kong. It found a high prevalence of Salmonella in the turtles, with considerable serotype diversity. The study also observed resistance to certain antibiotics, including some that are commonly used to treat salmonellosis. Additionally, a multidrug-resistance gene cfr was identified for the first time in Salmonella.
FRONTIERS IN VETERINARY SCIENCE
(2022)
Article
Nutrition & Dietetics
Vanesa Natalin Rocha Martin, Christophe Del'Homme, Christophe Chassard, Clarissa Schwab, Christian Braegger, Annick Bernalier-Donadille, Christophe Lacroix
Summary: In recent years, the relationship between gut microbiota and host health has been a major focus of research. Using animal models inoculated with infant fecal samples, researchers have found that an imbalance in gut microbiota and abnormal lactate metabolism appear to be the main causes of infant colic. They also identified a correlation between excessive H-2 production and certain bacteria in the infant gut, suggesting that an overproduction of H-2 may contribute to colic. Additionally, supplementation of specific bacteria, such as Cutibacterium avidum P279, was found to reduce colic symptoms.
FRONTIERS IN NUTRITION
(2022)
Article
Microbiology
Francis Muchaamba, Ueli von Ah, Roger Stephan, Marc J. A. Stevens, Taurai Tasara
Summary: This study reveals that cold-shock domain family proteins (Csps) play significant roles in nutrient utilization and stress responses in Listeria monocytogenes (Lm), contributing to the public health and food safety impacts of this pathogen.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Nutrition & Dietetics
Palni Kundra, Annelies Geirnaert, Benoit Pugin, Paola Morales Martinez, Christophe Lacroix, Anna Greppi
Summary: This study investigated the B12 production of human fecal microbiota and the effects of different levels of B12 on composition and activity. The results showed that healthy human gut microbial communities have the capacity to produce B12 independently of dietary intake, and supplementation of exogenous B12 may have limited impact on the gut microbial community composition and function.
FRONTIERS IN NUTRITION
(2022)
Article
Multidisciplinary Sciences
Magdalena Nueesch-Inderbinen, Andrea Treier, Marc J. A. Stevens, Roger Stephan
Summary: The study assessed the presence of pathogenic bacteria, specifically Shiga toxin-producing Escherichia coli (STEC), in game meat samples from different European countries. PCR analysis detected Shiga-toxin encoding genes in 84% of the samples, with 25% of the same samples containing isolated STEC strains. Various serotypes and sequence types were identified, with some strains carrying virulence factors associated with both STEC and extra-intestinal pathogenic E. coli (ExPEC). The findings suggest that game meat may serve as a potential source of STEC infections in humans, highlighting the importance of safe handling and preparation of such meat to prevent foodborne illnesses.
SCIENTIFIC REPORTS
(2023)
Article
Gastroenterology & Hepatology
Fabienne Kurt, Gabriel E. Leventhal, Marianne Rebecca Spalinger, Laura Anthamatten, Philipp Rogalla von Bieberstein, Carmen Menzi, Markus Reichlin, Marco Meola, Florian Rosenthal, Gerhard Rogler, Christophe Lacroix, Tomas de Wouters
Summary: By selecting nine strains and continuous co-culturing, a stable microbial consortium that emulates the central metabolic pathways of carbohydrate fermentation in the healthy human gut microbiota was constructed. The function-based consortium showed an efficacy comparable to FMT in counteracting acute colitis, while an equivalent mix of strains failed to match FMT. The approach of combining a bottom-up functional design with continuous co-cultivation is proposed as a powerful strategy to produce robust functionally designed synthetic consortia for therapeutic use.
Article
Food Science & Technology
Sara Boss, Roger Stephan, Jule Anna Horlbog, Ioannis Magouras, Violaine Albane Colon, Kittitat Lugsomya, Marc J. A. Stevens, Magdalena Nueesch-Inderbinen
Summary: This study found that about 65% of live edible Chinese frogs collected from wet markets in Hong Kong were carriers of Salmonella, including multiple serotypes. The study also identified a number of antimicrobial resistance genes and virulence determinants, as well as 21% of the isolates being multidrug-resistant. Therefore, public health measures should be implemented to mitigate the risk of Salmonella transmission to humans through handling edible frogs.
Article
Environmental Sciences
Michael Biggel, Sarah Hoehn, Andrea Frei, Kira Dassler, Christoph Jans, Roger Stephan
Summary: The study reveals the spread of E. coli ST131 lineage through wastewater and surface water, posing a significant challenge to public health and water management.
ENVIRONMENTAL POLLUTION
(2023)
Article
Food Science & Technology
Marc J. A. Stevens, Nicole Cernela, Roger Stephan, Angelika Lehner
Summary: Sequencing of Cronobacter sakazakii strains from a powdered infant formula plant over a 15-year period revealed two major sequence types, ST83 and ST4. Genomic comparisons showed clonality of most ST83 and some ST4 strains, with population-specific genes potentially involved in persistence, such as aggregation and stress-resistance genes in ST83 strains and fimbrial genes in ST4 strains. Several antimicrobial resistance genes, including a colistin resistance gene acquired via horizontal gene transfer, were found in these strains. The findings suggest that evolving C. sakazakii populations in an industrial environment may have an impact on public health.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Lea Bircher, Alain M. Sourabie, Marijana Paurevic, Janina Hochuli, Annelies Geirnaert, Chloe Navas, Benoit Drogue, Christophe Lacroix
Summary: In this study, we evaluated different yeast-based nutrients and B-vitamins for the cultivation of Faecalibacterium duncaniae A2-165. The results showed that yeast extracts promoted the growth of this microorganism, while yeast peptones and yeast cell wall product lacked essential growth factors. Additionally, B5 vitamin was identified as a strong growth promoter. Selecting nutritionally suitable yeast-based nutrients and combining them with other key nutrients can optimize the production of this microorganism with high yields.
MICROBIAL BIOTECHNOLOGY
(2023)
Article
Microbiology
Francis Muchaamba, Athmanya K. Eshwar, Marc J. A. Stevens, Roger Stephan, Taurai Tasara
Summary: Listeria monocytogenes, a bacterium posing challenges to public health and food safety, exhibits variations in virulence and stress resilience among different strains. Strains with different serotypes and genotypes have distinct pathogenicity and survival abilities, which contribute to food product contamination and outbreaks of listeriosis. Genetic and phenotypic differences between strains may play a crucial role in determining virulence and stress sensitivity.
FRONTIERS IN MICROBIOLOGY
(2022)