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Antonie Van Leeuwenhoek

Imen Nouioui, Faten Ghodhbane-Gtari, Marlen Jando, Louis S Tisa, Hans-Peter Klenk, Maher Gtari
Strain CpI1T was, in 1978, the first isolate of the genus Frankia to be obtained from Comptonia peregrina root nodules. In this study, a polyphasic approach was performed to identify the taxonomic position of strain CpI1T among the members of the genus Frankia. The strain contains meso-diaminopimelic acid as the diagnostic diamino acid and galactose, glucose, mannose, rhamnose, ribose and xylose as cell wall sugars. The polar lipids were found to consist of phosphatidylinositol, diphosphatidylglycerol, glycophospholipids, phosphatidylglycerol, an aminophospholipid and unidentified phospholipids and lipids...
July 20, 2018: Antonie Van Leeuwenhoek
Geeta Chhetri, Dahye Yang, Jiwon Choi, Hyungdong Kim, Taegun Seo
A Gram-stain negative, aerobic, oxidase and catalase positive, non-flagellated, pink coloured bacterium with gliding motility, designated as strain UDD1T was isolated from soil. The bacterium lacked flexirubin-type pigments. Phylogenetic analysis based on its 16S rRNA gene sequence revealed that strain UDD1T formed a lineage within the family Cytophagaceae of the phylum Bacteroidetes, and forms a distinct clade with type strains of the closely related genus Pontibacter with similarities of 91.36-93.62%. Strain UDD1T contained MK-7 as the predominant menaquinone and summed feature 4 (iso-C17:1 I and/or anteiso-C17:1 B) and iso-C15:0 as the major fatty acids...
July 19, 2018: Antonie Van Leeuwenhoek
Seo-Yeong Kim, Leonid N Ten, Seung-Yeol Lee, Seung-Han Kim, In-Kyu Kang, Hee-Young Jung
A Gram-stain negative, non-motile, rod-shaped bacterial strain, designated 2-56T , was isolated from water and characterized taxonomically using a polyphasic approach. Comparative 16S rRNA gene sequence analysis showed that strain 2-56T belongs to the family Flavobacteriaceae in the phylum Bacteroidetes and is closely related to Flavobacterium paronense KNUS1T (98.4%) and Flavobacterium collinsense 4-T-2T (96.7%). The G + C content of the genomic DNA of strain 2-56T was 33.4 mol%. The isolate contained MK-6 as the predominant respiratory quinone, and iso-C15:1 G (15...
July 18, 2018: Antonie Van Leeuwenhoek
Wanessa Scopel, Fernando Luis Cônsoli
Symbionts are widely distributed in eukaryotes, and potentially affect the physiology, ecology and evolution of their host. Most insects harbour free-living bacteria in their haemocoel and gut lumen, intracellular-living bacteria in a range of tissues or bacteria in host-derived specialized cells. Stinkbugs, as do many arthropods, harbour extracellular bacteria in the gut that may affect the fitness of their host. This study identified the culturable symbionts associated with the ovaries, spermatheca, seminal vesicle and posterior midgut region (V4) of males and females of Euschistus heros (F...
July 17, 2018: Antonie Van Leeuwenhoek
Hexiang Jiang, Rining Zhu, Hongtao Liu, Chuntong Bao, Jianfang Liu, Abdalla Eltahir, Paul R Langford, Diangang Sun, Zhonghua Liu, Changjiang Sun, Jingmin Gu, Wenyu Han, Xin Feng, Liancheng Lei
Actinobacillus pleuropneumoniae is the cause of porcine pleuropneumonia, for which the mortality rate is high. Host peripheral blood is a body site for the immune clearance of pathogens mediated by release of inflammatory factors. However, "out of control" inflammatory factor release can contribute to host death. To further understand the changes in the transcription level of immune-related effectors, samples of peripheral blood mononuclear cells (PBMCs) collected from piglets at different stages of infection (0, 24 and 120 h) were sequenced on an Illumina HiSeq™ 4000 platform...
July 14, 2018: Antonie Van Leeuwenhoek
Luz E Casados-Vázquez, Dennis K Bideshi, José E Barboza-Corona
The structural gene that encodes thurincin H, a bacteriocin produced by Bacillus thuringiensis, is harboured in a genetic cluster (thnP, E, D, R, A1, A2, A3, B, T, I) that controls its synthesis, modification, secretion and autoimmunity. The specific genes in the cassette that confer immunity in B. thuringiensis to thurincin H are unknown. To identify these immunity determinants, we generated constructs that were used to transform a natural thurincin H-sensitive B. thuringiensis strain (i.e. Btk 404), and resistance or susceptibility to the bacteriocin in resultant recombinants was evaluated...
July 13, 2018: Antonie Van Leeuwenhoek
Yue Shen, Tianyu Sun, Shanwen Jiang, Shan Mu, Dongmei Li, Xiaowei Guo, Jianli Zhang, Junwei Zhao, Wensheng Xiang
A novel Gram-stain positive, spore-forming, aerobic actinomycete, designated strain NEAU-QTH3-11T , was isolated from muddy soil collected from a stream in Qitaihe, Heilongjiang Province, northeast China and characterised using a polyphasic approach. The 16S rRNA gene sequence analysis showed that strain NEAU-QTH3-11T belongs to the genus Streptomyces and is closely related to Streptomyces rhizosphaerihabitans NBRC 109807T (99.38%) and Streptomyces mirabilis JCM 4791T (99.03%). Phylogenetic analysis based on the 16S rRNA gene sequences indicated that the strain formed a cluster with S...
July 11, 2018: Antonie Van Leeuwenhoek
Robert Jankowiak, Agnieszka Ostafińska, Truls Aas, Halvor Solheim, Piotr Bilański, Riikka Linnakoski, Georg Hausner
Species of Leptographium are characterized by mononematous or synnematous conidiophores and are commonly associated with different arthropods. Some of them also produce a sexual state characterised by globose ascomata with elongated necks. Compared to investigations on coniferous trees, the occurrence of Leptographium species on hardwood trees has been poorly studied in Europe. During a survey of ophiostomatoid fungi on various hardwood tree species in Norway and Poland, three unusual species, which fit in the broader morphological description of Leptographium spp...
July 6, 2018: Antonie Van Leeuwenhoek
J F Montes García, Sergio Vaca, Norma L Delgado, Alina Uribe-García, Candelario Vázquez, P Sánchez Alonso, J Xicohtencatl Cortes, A Cruz Cordoba, E Negrete Abascal
Mannheimia haemolytica causes respiratory disease in cattle. Amyloid proteins are a major component of biofilms; they aid in adhesion and confer resistance against several environmental insults. The amyloid protein curli is highly resistant to protease digestion and physical and chemical denaturation and binds Congo red (CR) dye. The purpose of this study was to characterize an approximately 50-kDa CR-binding amyloid-like protein (ALP) expressed by M. haemolytica. This protein resisted boiling and formic acid digestion and was recognized by a polyclonal anti-Escherichia coli curli serum, suggesting its relationship with amyloid proteins...
July 5, 2018: Antonie Van Leeuwenhoek
Neeli Habib, Inam Ullah Khan, Xiao Chu, Min Xiao, Shuai Li, Bao-Zhu Fang, Xiao-Yang Zhi, Wen-Jun Li
A novel actinomycete, designated strain YIM CF22T , was isolated from a desert soil sample collected from Turpan in Xinjiang Uyghur Autonomous Region, north-western China. The taxonomic position of the strain YIM CF22T is described based on a polyphasic approach. Strain YIM CF22T was found to form irregular sporangia on agar media. It contains meso-diaminopimelic acid in the cell wall peptidoglycan. The major menaquinone was identified as MK-9(H4 ); the polar lipids were identified as diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylinositol, two unidentified phospholipids and two unidentified glycolipids...
July 4, 2018: Antonie Van Leeuwenhoek
Lihui Liu, Tao Yuan, Fei Yang, Ziwei Liu, Meiyan Yang, Guixiang Peng, Zhiyuan Tan
A nitrogen-fixing, endospore-forming bacterium, designated strain L201T was isolated from the leaves of Bryophyllum pinnatum growing in South China Agricultural University. Phylogenetic analysis of the 16S rRNA gene sequence indicated that strain L201T is affiliated with the genus Paenibacillus, and closely related to Paenibacillus albidus Q4-3T (97.4%), Paenibacillus odorifer DSM 15391T (97.3%) and Paenibacillus borealis DSM 13188T (97.2%). The main fatty acids components was anteiso-C15:0 (48.1%). The predominant isoprenoid quinone was MK-7...
July 3, 2018: Antonie Van Leeuwenhoek
Muralidharan Muthu, Yakir Ophir, Lucy J Macdonald, Alankar Vaidya, Gareth Lloyd-Jones
The objective was to understand the roles of multiple catechol dioxygenases in the type strain Sphingobium scionense WP01T (Liang and Lloyd-Jones in Int J Syst Evol Microbiol 60:413-416, 2010a) that was isolated from severely contaminated sawmill soil. The dioxygenases were identified by sequencing, examined by determining the substrate specificities of the recombinant enzymes, and by quantifying gene expression following exposure to model priority pollutants. Catechol dioxygenase genes encoding an extradiol xylE and two intradiol dioxygenases catA and clcA that are highly similar to sequences described in other sphingomonads are described in S...
June 29, 2018: Antonie Van Leeuwenhoek
Xiaojing Xia, Xin Wang, Xiaobing Wei, Jinqing Jiang, Jianhe Hu
One of the most important zoonotic pathogens worldwide, Streptococcus suis is a swine pathogen that is responsible for meningitis, toxic shock and even death in humans. S. suis infection develops rapidly with nonspecific clinical symptoms in the early stages and a high fatality rate. Recently, much attention has been paid to the high prevalence of S. suis as well as the increasing incidence and its epidemic characteristics. As laboratory-acquired infections of S. suis can occur and it is dangerous to public health security, timely and early diagnosis has become key to controlling S...
June 23, 2018: Antonie Van Leeuwenhoek
Long Jin, Xuewen Wu, So-Ra Ko, Feng-Jie Jin, Taihua Li, Chi-Yong Ahn, Hee-Mock Oh, Hyung-Gwan Lee
A polyphasic taxonomic study was carried out on strains PB105T and PB108 isolated from a grass soil in Korea. The cells of the strains were Gram-stain negative, non-spore-forming, non-motile, and rod-shaped. Comparative 16S rRNA gene sequence studies showed a clear affiliation of these strains with Bacteroidetes, which showed high pairwise sequence similarities with Hymenobacter algoricola VUG-A23aT (99.2%), Hymenobacter fastidiosus VUG-A124aT (97.4%), and Hymenobacter daecheongensis Dae14T (96.9%). The phylogenetic analysis based on 16S rRNA gene sequences showed that the strains formed a clear phylogenetic lineage with the genus Hymenobacter...
June 22, 2018: Antonie Van Leeuwenhoek
Inam Ullah Khan, Neeli Habib, Min Xiao, Asem Mipeshwaree Devi, Maham Habib, Mohammad Saeid Hejazi, Nimaichand Salam, Xiao-Yang Zhi, Wen-Jun Li
A Gram-stain positive, moderately thermophilic, aerobic, spore-forming and rod-shaped bacterium, designated YIM 73012T , was isolated from a sediment sample collected from a hot spring located in Tibet, China, and was characterized by using a polyphasic taxonomy approach. The strain is oxidase positive and catalase negative. Growth occurred at 37-65 °C (optimum, 45-50 °C), at pH 6.0-8.5 (optimum, pH 7.0-7.5) and with 0.5-3.5% NaCl (optimum, 0.5-1.0%, w/v). The major fatty acids were iso-C15:0 , iso-C16:0 and C16:0 ...
June 21, 2018: Antonie Van Leeuwenhoek
Junwei Zhao, Dongmei Li, Hao Jiang, Liyuan Han, Shanwen Jiang, Xiaowei Guo, Xiangjing Wang, Wensheng Xiang
A novel actinomycete, designated strain NEAU-LA29T , was isolated from soil collected from Xianglu Mountain and subjected to a polyphasic taxonomic study. Based on a polyphasic taxonomic approach comprising chemotaxonomic, phylogenetic, morphological and physiological characterisation, the isolate has been affiliated to the genus Streptomyces. 16S rRNA gene sequence analysis showed that the isolate is closely related to Streptomyces vastus JCM4524T (98.8% identity) and Streptomyces cinereus DSM43033T (97.9%)...
June 20, 2018: Antonie Van Leeuwenhoek
Alan T Bull, Barbara A Andrews, Cristina Dorador, Michael Goodfellow
No abstract text is available yet for this article.
June 18, 2018: Antonie Van Leeuwenhoek
Pedro Leão, Frederico J Gueiros-Filho, Dennis A Bazylinski, Ulysses Lins, Fernanda Abreu
Magnetotactic bacteria, for the most part, are free-living, motile, unicellular prokaryotes that inhabit almost all marine and freshwater environments. One notable exception to the unicellular mode, however, are the magnetotactic multicellular prokaryotes. These morphologically unique prokaryotes (e.g., Candidatus Magnetoglobus multicellularis) are motile aggregates of 20-40 genetically identical, Gram-negative cells organised as a sphere (or ovoid in shape) and only motile as a unit. No specific close physical association between magnetotactic bacteria and non-magnetotactic microorganisms has ever been reported...
June 18, 2018: Antonie Van Leeuwenhoek
Nan-Nan Wang, Liu-Yan Zhou, Ying-Xiu Li, Zong-Jun Du
A strictly aerobic, Gram-stain negative, long rod-shaped, motile by gliding and yellow pigmented bacterium, designated strain w01T , was isolated from marine sediment. The strain was characterised to determine its taxonomic position by using a polyphasic approach. Strain w01T was observed to grow optimally in the presence of 3.0% (w/v) NaCl, at 30 °C and to hydrolyse Tweens 20, 40 and 80, starch, casein and alginate. Carotenoid pigments were found to be produced but not flexirubin-type pigments. On the basis of 16S rRNA gene sequence similarities, strain w01T is phylogenetically affiliated with the genus Aquimarina and is closely related to Aquimarina macrocephali JCM 15542T (97...
June 18, 2018: Antonie Van Leeuwenhoek
Riikka Linnakoski, Risto Kasanen, Ilmeini Lasarov, Tiia Marttinen, Abbot O Oghenekaro, Hui Sun, Fred O Asiegbu, Michael J Wingfield, Jarkko Hantula, Kari Heliövaara
Symbiosis with microbes is crucial for survival and development of wood-inhabiting longhorn beetles (Coleoptera: Cerambycidae). Thus, knowledge of the endemic fungal associates of insects would facilitate risk assessment in cases where a new invasive pest occupies the same ecological niche. However, the diversity of fungi associated with insects remains poorly understood. The aim of this study was to investigate fungi associated with the native large poplar longhorn beetle (Saperda carcharias) and the recently introduced Asian longhorn beetle (Anoplophora glabripennis) infesting hardwood trees in Finland...
June 14, 2018: Antonie Van Leeuwenhoek
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