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Antonie Van Leeuwenhoek

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https://www.readbyqxmd.com/read/28324231/occurrence-and-virulence-properties-of-vibrio-and-salinivibrio-isolates-from-tropical-lagoons-of-the-southern-caribbean-sea
#1
Milagro Fernández-Delgado, Paula Suárez, Sandra Giner, Virginia Sanz, Jessy Peña, Damarys Sánchez, M Alexandra García-Amado
The Vibrionaceae are Gram-negative bacteria present in marine and estuarine environments worldwide, including several species known as important pathogens to humans and aquatic organisms. The aim of this research was to investigate the occurrence and virulence properties of Vibrio and Salinivibrio isolated from lagoons at Cuare Wildlife Refuge and Margarita Island in the southern Caribbean Sea. Water, plankton and oyster samples were collected during October 2011 and March 2012 and examined by specific PCR and culture methods...
March 21, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28324230/lentzea-chajnantorensis-sp-nov-an-actinobacterium-from-a-very-high-altitude-cerro-chajnantor-gravel-soil-in-northern-chile
#2
Hamidah Idris, Imen Nouioui, Juan A Asenjo, Alan T Bull, Michael Goodfellow
The taxonomic position of a filamentous actinobacterial strain, isolate H45(T), recovered from a high altitude Atacama Desert gravel soil, was established using a polyphasic approach. The strain, which is known to produce novel dienes, has chemotaxonomic and morphological properties typical of the genus Lentzea and formed a distinct branch in the Lentzea 16S rRNA gene tree that is closely related to the type strain of Lentzea kentuckyensis. The two strains were distinguished using a combination of phenotypic properties and by a DNA:DNA relatedness value of 37...
March 21, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28321521/pseudomonas-sesami-sp-nov-a-plant-growth-promoting-gammaproteobacteria-isolated-from-the-rhizosphere-of-sesamum-indicum-l
#3
Munusamy Madhaiyan, Selvaraj Poonguzhali, Venkatakrishnan Sivaraj Saravanan, Kumaran Selvapravin, Veeramuthu Duraipandiyan, Naif Abdullah Al-Dhabi
A novel Gram-stain negative, aerobic, motile, rod-shaped bacterium was isolated from Sesame (Sesamum indicum L.) rhizosphere soil. Based on the 16S rRNA gene similarity value (99.4-98.6%) obtained with phylogenetically closely related strains and through analyses of their house keeping genes (atpD, infB and rpoB), the strain SI-P133(T) was delineated among the species of the genus Pseudomonas and was subjected to polyphasic taxonomic analysis. It was a chemoorganotroph which grew at wide range of temperature (4-45 °C), pH (5...
March 20, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28315019/an-endophytic-fungus-gibberella-moniliformis-from-lawsonia-inermis-l-produces-lawsone-an-orange-red-pigment
#4
Hatnagar Sarang, Pijakala Rajani, Madhugiri Mallaiah Vasanthakumari, Patel Mohana Kumara, Ramamoorthy Siva, Gudasalamani Ravikanth, R Uma Shaanker
Lawsone (2-hydroxy-1, 4-napthoquinone), also known as hennotannic acid, is an orange red dye used as a popular skin and hair colorant. The dye is produced in the leaves of Lawsonia inermis L, often referred to as the "henna" tree. In this study, we report the production of lawsone by an endophytic fungus, Gibberella moniliformis isolated from the leaf tissues of Lawsonia inermis. The fungus produced the orange-red dye in potato dextrose agar and broth, independent of the host tissue. Presence of lawsone was confirmed spectrometrically using HPLC and ESI-MS/MS analysis...
March 17, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28303400/two-new-species-of-the-fusarium-fujikuroi-species-complex-isolated-from-the-natural-environment
#5
Tarek A A Moussa, Hassan S Al-Zahrani, Naif M S Kadasa, Sarah A Ahmed, G Sybren de Hoog, Abdullah M S Al-Hatmi
Two new species in the Fusarium fujikuroi species complex (FFSC) are introduced. One of these, represented by strain CBS 454.97 was isolated from plant debris (Striga hermonthica) in the Sudan, while the second, represented by strains CBS 119850 and CBS 483.94, which originated from soil in Australia. Molecular analyses were performed including TEF1 spanning 576 bp region, 860 bp region of rPB2, and 500 bp BT2 region. Phylogenetic trees based on these regions showed that the two species are clearly distinct from all known taxa in the F...
March 16, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28303399/deinococcus-planocerae-sp-nov-isolated-from-a-marine-flatworm
#6
Huina Lin, Yong Wang, Jiaomei Huang, Qiliang Lai, Ying Xu
A Gram-positive, non-motile and coccoid strain, designated XY-FW106(T), was isolated from a marine flatworm identified to be Planocera sp. The 16S rRNA gene sequence of this pink organism was consistent with membership of the genus Deinococcus, with high sequence similarity to Deinococcus aetherius ST0316(T) (94.7%). The optimum growth temperature range of the strain XY-FW106(T) was found to be 25-30 °C and optimum growth occurs at pH 7.2-7.4 without NaCl. The strain XY-FW106(T) was found to contain unidentified glycolipids, unidentified phosphoglycolipids, unidentified phospholipids and unidentified lipids, which differed from those of closely related species...
March 16, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28289918/geodermatophilus-daqingensis-sp-nov-isolated-from-petroleum-contaminated-soil
#7
Yang Wang, Liguo Zhang, Xiaofei Zhang, Jinying Huang, Yu Zhao, Yuanling Zhao, Jianxin Liu, Cui Huang, Jing Wang, Yingying Hu, Guoling Ren, Xiuhong Xu
A novel Gram-positive actinobacterium, designated WT-2-1(T), was isolated from a sample of petroleum-contaminated soil collected in Daqing, Heilongjiang province, China and characterised using a polyphasic taxonomic approach. The optimal growth for strain WT-2-1(T) was found to be at 25-35 °C and at pH 6.0-9.0 and with 0-4% (w/v) NaCl, forming blackish green-coloured colonies. Chemotaxonomic and molecular characteristics of the isolate match those described for members of the genus Geodermatophilus. The peptidoglycan was found to contain meso-diaminopimelic acid; galactose, glucose and xylose were detected as diagnostic sugars...
March 13, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28281028/a-proposal-for-a-portal-to-make-earth-s-microbial-diversity-easily-accessible-and-searchable
#8
Boris A Vinatzer, Long Tian, Lenwood S Heath
Estimates of the number of bacterial species range from 10(7) to 10(12). At the pace at which descriptions of new species are currently being published, the description of all bacterial species on earth will only be completed in thousands of years. However, even if one day all species were named and described, these names and descriptions would still be of little practical value unless they could be easily searched and accessed, so that novel strains could be easily identified as members of any of these species...
March 9, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28265787/isolation-and-characterisation-of-an-enterocin-p-producing-enterococcus-lactis-strain-from-a-fresh-shrimp-penaeus-vannamei
#9
Olfa Ben Braïek, Hamdi Ghomrassi, Paola Cremonesi, Stefano Morandi, Yannick Fleury, Patrick Le Chevalier, Khaled Hani, Omrane Bel Hadj, Taoufik Ghrairi
Screening for lactic acid bacteria (LAB) from fresh shrimp samples (Penaeus vannamei) collected from retail seafood markets in the Tunisian's coast, resulted in the isolation of an Enterococcus strain termed Q1. This strain was selected for its antagonistic activity against pathogenic bacteria such as Listeria monocytogenes, Pseudomonas aeruginosa, Lactococcus garvieae and against fungi (Aspergillus niger and Fusarium equiseti). The Q1 strain was characterised using standard morphological and biochemical tests, growth assays at different temperatures, pH and salinity...
March 7, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28255640/phylogenomic-resolution-of-the-bacterial-genus-pantoea-and-its-relationship-with-erwinia-and-tatumella
#10
Marike Palmer, Emma T Steenkamp, Martin P A Coetzee, Wai-Yin Chan, Elritha van Zyl, Pieter De Maayer, Teresa A Coutinho, Jochen Blom, Theo H M Smits, Brion Duffy, Stephanus N Venter
Investigation of the evolutionary relationships between related bacterial species and genera with a variety of lifestyles have gained popularity in recent years. For analysing the evolution of specific traits, however, a robust phylogeny is essential. In this study we examined the evolutionary relationships among the closely related genera Erwinia, Tatumella and Pantoea, and also attempted to resolve the species relationships within Pantoea. To accomplish this, we used the whole genome sequence data for 35 different strains belonging to these three genera, as well as nine outgroup taxa...
March 2, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28251351/actinomadura-alkaliterrae-sp-nov-isolated-from-an-alkaline-soil
#11
Hilal Ay, Imen Nouioui, Maria Del Carmen Montero-Calasanz, Lorena Carro, Hans-Peter Klenk, Michael Goodfellow, José M Igual, Demet Çetin, Nevzat Şahin, Kamil Işık
A polyphasic study was undertaken to establish the taxonomic status of an Actinomadura strain isolated from the margin of a saline, alkaline lake in Central Anatolia, Turkey. Strain D310AT(T) was shown to have chemotaxonomic, cultural and morphological properties consistent with its classification in the genus Actinomadura such as hooked or irregular spiral spore chains, meso-diaminopimelic acid as the major cell wall diaminopimelic acid, and diphosphatidylglycerol and phosphatidylinositol as major polar lipids...
March 1, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28243951/the-current-status-of-cyanobacterial-nomenclature-under-the-prokaryotic-and-the-botanical-code
#12
Aharon Oren, Stefano Ventura
Cyanobacterial taxonomy developed in the botanical world because Cyanobacteria/Cyanophyta have traditionally been identified as algae. However, they possess a prokaryotic cell structure, and phylogenetically they belong to the Bacteria. This caused nomenclature problems as the provisions of the International Code of Nomenclature for algae, fungi, and plants (ICN; the "Botanical Code") differ from those of the International Code of Nomenclature of Prokaryotes (ICNP; the "Prokaryotic Code"). While the ICN recognises names validly published under the ICNP, Article 45(1) of the ICN has not yet been reciprocated in the ICNP...
February 27, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28204908/a-large-scale-evaluation-of-algorithms-to-calculate-average-nucleotide-identity
#13
Seok-Hwan Yoon, Sung-Min Ha, Jeongmin Lim, Soonjae Kwon, Jongsik Chun
Average nucleotide identity (ANI) is a category of computational analysis that can be used to define species boundaries of Archaea and Bacteria. Calculating ANI usually involves the fragmentation of genome sequences, followed by nucleotide sequence search, alignment, and identity calculation. The original algorithm to calculate ANI used the BLAST program as its search engine. An improved ANI algorithm, called OrthoANI, was developed to accommodate the concept of orthology. Here, we compared four algorithms to compute ANI, namely ANIb (ANI algorithm using BLAST), ANIm (ANI using MUMmer), OrthoANIb (OrthoANI using BLAST) and OrthoANIu (OrthoANI using USEARCH) using >100,000 pairs of genomes with various genome sizes...
February 15, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28190154/reassessment-of-the-taxonomic-position-of-burkholderia-andropogonis-and-description-of-robbsia-andropogonis-gen-nov-comb-nov
#14
Lucilene Lopes-Santos, Daniel Bedo Assumpção Castro, Mariana Ferreira-Tonin, Daniele Bussioli Alves Corrêa, Bevan Simon Weir, Duckchul Park, Laura Maria Mariscal Ottoboni, Júlio Rodrigues Neto, Suzete Aparecida Lanza Destéfano
The phylogenetic classification of the species Burkholderia andropogonis within the Burkholderia genus was reassessed using 16S rRNA gene phylogenetic analysis and multilocus sequence analysis (MLSA). Both phylogenetic trees revealed two main groups, named A and B, strongly supported by high bootstrap values (100%). Group A encompassed all of the Burkholderia species complex, whi.le Group B only comprised B. andropogonis species, with low percentage similarities with other species of the genus, from 92 to 95% for 16S rRNA gene sequences and 83% for conserved gene sequences...
February 11, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28190153/inediibacterium-massiliense-gen-nov-sp-nov-a-new-bacterial-species-isolated-from-the-gut-microbiota-of-a-severely-malnourished-infant
#15
Maryam Tidjani Alou, Jaishriram Rathored, Caroline Michelle, Gregory Dubourg, Claudia Andrieu, Nicholas Armstrong, Cheikh Sokhna, Aldiouma Diallo, Didier Raoult, Pierre-Edouard Fournier
A novel strain, Mt12(T) (=CSUR P1907 = DSM 100590), was isolated from the fecal sample of a 7-month-old girl from Senegal afflicted with severe acute malnutrition. This bacterium is a strictly anaerobic, spore-forming Gram-stain positive bacillus. The major cellular fatty acid was identified as tetradecanoic acid. Its 16S rRNA gene sequence exhibited 94.9% similarity with that of Crassaminicella profunda strain Ra1766H(T), currently the closest species with a validly published name. The draft genome of strain Mt12(T) is 3,497,275-bp long with a 30...
February 11, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28185026/streptomyces-aridus-sp-nov-isolated-from-a-high-altitude-atacama-desert-soil-and-emended-description-of-streptomyces-noboritoensis-isono-et-al-1957
#16
Hamidah Idris, David P Labeda, Imen Nouioui, Jean Franco Castro, Maria Del Carmen Montero-Calasanz, Alan T Bull, Juan A Asenjo, Michael Goodfellow
A polyphasic study was undertaken to determine the taxonomic status of a Streptomyces strain which had been isolated from a high altitude Atacama Desert soil and shown to have bioactive properties. The strain, isolate H9(T), was found to have chemotaxonomic, cultural and morphological properties that place it in the genus Streptomyces. 16S rRNA gene sequence analyses showed that the isolate forms a distinct branch at the periphery of a well-delineated subclade in the Streptomyces 16S rRNA gene tree together with the type strains of Streptomyces crystallinus, Streptomyces melanogenes and Streptomyces noboritoensis...
February 9, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28176144/antibacterial-low-molecular-weight-compounds-produced-by-the-marine-bacterium-rheinheimera-japonica-kmm-9513-t
#17
Natalia I Kalinovskaya, Lyudmila A Romanenko, Anatoly I Kalinovsky
Strain KMM 9513(T) was isolated from a sediment sample collected from the Sea of Japan seashore and selected due to its ability to inhibit indicator bacterial growth. The strain KMM 9513(T) has been recently described as a novel species Rheinheimera japonica. This study was undertaken to determine which substances produced by strain KMM 9513(T) could be responsible for its antimicrobial activity. Eight compounds were obtained from an ethyl acetate extract of R. japonica KMM 9513(T). The structures of five diketopiperazines (4-8) and diisobutyl-, dibutyl- and bis(2-ethylhexyl) phthalates (1-3) were established on the basis of detailed interpretation of NMR data, by Marfey method and optical rotation data...
February 7, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28176143/microbacterium-zeae-sp-nov-an-endophytic-bacterium-isolated-from-maize-stem
#18
Jun-Lian Gao, Pengbo Sun, Xu-Ming Wang, Fan-Yang Lv, Jian-Guang Sun
A novel Gram-stain positive, aerobic, non-motile, non-spore-forming and rod-shaped strain designated 1204(T) was isolated from surface-sterilised stem tissue of maize planted in Fangshan District of Beijing, People's Republic of China. A polyphasic taxonomic study was performed on the new isolate. On the basis of 16S rRNA gene sequence similarity studies, this isolate belongs to the genus Microbacterium. High levels of 16S rRNA gene sequence similarity were found between strain 1204(T) and Microbacterium enclense NIO-1002(T) (98...
February 7, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28168566/the-value-of-cultures-to-modern-microbiology
#19
Brian Austin
Since the late nineteenth century, pure cultures have been regarded as the cornerstone of bacteriology. However, not all bacteria will multiply sufficiently to produce visible colonies on solid media; some cells will produce micro-colonies that are invisible to the naked eye. Moreover, the proportion of culturable cells that produce visible growth will vary according to the species and the state of the cells-are they actively growing or comparatively inactive? The latter have a poorer rate of recovery in terms of cultivability...
February 6, 2017: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/28168565/introducing-a-digital-protologue-a-timely-move-towards-a-database-driven-systematics-of-archaea-and-bacteria
#20
EDITORIAL
Ramon Rosselló-Móra, Martha E Trujillo, Iain C Sutcliffe
No abstract text is available yet for this article.
February 6, 2017: Antonie Van Leeuwenhoek
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