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Antonie Van Leeuwenhoek

Md Amdadul Huq
A novel Gram-staining negative, yellow-pigmented, non-motile, aerobic and rod-shaped bacterium, designated MAH-11T , was isolated from rhizosphere of Pinus koraiensis and was characterised by using a polyphasic taxonomic approach. The colonies were smooth, circular and 0.3-1.0 mm in diameter when grown on R2A agar for 3 days. The strain was positive for both catalase and oxidase tests. Optimum growth temperature and pH were 28-30 °C and 7.0, respectively. Cell growth occurs on R2A agar, nutrient agar, Luria-Bertani agar and tryptone soya agar but not on MacConkey agar...
April 17, 2019: Antonie Van Leeuwenhoek
Paris S Hamm, Nicole A Caimi, Diana E Northup, Ernest W Valdez, Debbie C Buecher, Christopher A Dunlap, David P Labeda, Andrea Porras-Alfaro
Four bacterial strains, with the capability of inhibiting Pseudogymnoascus destructans, the causative agent of white-nose syndrome, were isolated from male Townsend's big-eared bats (Corynorhinus townsendii, Family: Vespertilionidae) in New Mexico. Isolates AC161, AC162, AC208, and AC230T were characterised as a novel clade using morphological, phenotypic and phylogenetic analysis. A draft genome of the type strain was completed to determine its taxonomy and secondary metabolite biosynthetic potential. Multi-locus sequence analysis nests AC230T with neighbours Streptomyces scopuliridis (NRRL B-24574T ), Streptomyces lushanensis (NRRL B-24994T ), Streptomyces odonnellii (NRRL B-24891T ) and Streptomyces niveus (NRRL 2466T )...
April 16, 2019: Antonie Van Leeuwenhoek
Elena N Kaparullina, Alina A Chemodurova, Nadezhda V Agafonova, Tatiana A Karataeva, Ekaterina N Detkova, Yuri A Trotsenko, Nina V Doronina
An aerobic facultatively methylotrophic bacterium, designated strain Das4.1T , was isolated from a root of Daucus carota L. The cells of this strain were observed to be Gram-stain negative, asporogenous, non-motile short rods multiplying by binary fission. Strain Das4.1T can utilise methanol, methylamine and a variety of polycarbon compounds as carbon and energy sources. C1 -compounds were found to be assimilated via the isocitrate lyase-negative variant of the serine pathway. On medium with 0.5% methanol, growth of strain Das4...
April 10, 2019: Antonie Van Leeuwenhoek
Monali C Rahalkar, Kumal Khatri, Pranitha S Pandit, Prashant K Dhakephalkar
Methane oxidation by methanotrophs is a very important environmental process in the mitigation of methane. Methylobacter (Mtb.) clade 2 members have been reported as dominant methane oxidisers in soils and sediments worldwide. We enriched and purified a methanotroph from a tropical rice field soil sample from India. The highly enriched culture showed the presence of motile, long and thick rods (3-5 µm × 0.9-1.2 µm) and minor presence of short, thin rods. The culture was purified on agarose medium and formed yellow colonies which showed the presence of only thick and long rods, henceforth termed as strain KRF1...
April 9, 2019: Antonie Van Leeuwenhoek
Wenxi Qian, Weiping Ao, Cunhui Jia, Zhipeng Li
The rumen microbiome contributes greatly to the degradation of plant fibres to volatile fatty acids and microbial products, affecting the health and productivity of ruminants. In this study, we investigated the dynamics of colonisation by bacterial communities attached to reeds and cottonseed hulls in the rumen of Tarim red deer, a native species distributed in the desert of the Tarim Basin. The reed and cottonseed hull samples incubated in nylon bags for 1, 6, 12, and 48 h were collected and used to examine the bacterial communities by next-generation sequencing of the bacterial 16S rRNA gene...
April 2, 2019: Antonie Van Leeuwenhoek
Zhaobin Huang, Yaping Du, Qiliang Lai, Zongze Shao
A Gram-stain negative, rod-shaped and non-flagellated bacterium, designated strain 1Q3T , was isolated from coastal seawater in Xiamen Island, China, and subjected to taxonomic characterisation using a polyphasic approach. Strain 1Q3T was found to be aerobic, non-gliding and to lack flexirubin-type pigments. Catalase activity was found to be negative and oxidase positive. The strain has the ability to degrade protein. The nearly complete 16S rRNA gene sequence of strain 1Q3T shows high sequence similarities with Nonlabens aestuariivivens OITF-31T (96...
April 2, 2019: Antonie Van Leeuwenhoek
Su-Kyung Kim, MooChang Kook, Zheng-Fei Yan, Sang-Yong Park, Sang Suk Kim, Ho Bin Kim, Huan Trinh, Kyung Hwa Won, Jung-Eun Yang, Tae-Hoo Yi
A Gram-stain-negative, facultatively anaerobic, non-motile and rod-shaped bacterial strain, designated THG-SD5.5T , was isolated from a soil sample collected in a tangerine field, Republic of Korea. According to the 16S rRNA gene sequence comparisons, the isolate was identified as a member of the genus Chitinophaga and to be closely related to Chitinophaga ginsengihumi KACC 17604T (97.9%) and Chitinophaga rupis KACC 14521T (97.5%). The 16S rRNA gene sequence similarities with other species of the genus Chitinophaga were in the range 92...
March 28, 2019: Antonie Van Leeuwenhoek
Ofélia Godinho, Rita Calisto, Lise Øvreås, Sandra Quinteira, Olga Maria Lage
Antimicrobials are naturally produced by microbes and therefore have always been present in their environment, as well as accompanying resistance mechanisms. The antibiotic resistance profile of environmental species is particularly relevant since genetic determinants of resistance can spread through horizontal gene transfer and reach clinically important species. The phylum Planctomycetes comprises Gram-negative bacteria characterised by unusual features and appear to be ubiquitously distributed. Members of this group have recently been characterised as producers of bioactive compounds, namely antimicrobials, but their antibiotic susceptibility profile has been scarcely studied...
March 27, 2019: Antonie Van Leeuwenhoek
Geeta Chhetri, Jiyoun Kim, Inhyup Kim, Myung Kyum Kim, Taegun Seo
A Gram-stain negative, aerobic, salmon-pink, non-motile and rod-shaped bacterium, designated strain 15J11-1T , was isolated from a soil sample collected from the university garden in Nowongu, South Korea. The 16S rRNA gene sequence analysis showed that strain 15J11-1T is phylogenetically related to Runella slithyformis DSM 19594T and Runella palustris HMF3829T (96.9% and 95.4% sequence similarity, respectively). The major fatty acids of strain 15J11-1T were identified as iso-C15:0 , iso-C17:0 3-OH, C16:1 ω5c and summed feature 3 (C16:1 ω7c and/or C16:1 ω6c)...
March 26, 2019: Antonie Van Leeuwenhoek
Inhyup Kim, Jiwon Choi, Geeta Chhetri, Taegun Seo
Two bacterial strains, designated D10T and U8T , were isolated from soil samples from the Dong-angyeong cave and Geommeolle wharf sea-coast, Udo-Island, Jeju, South Korea. Both novel bacterial strains are yellow-pigmented, Gram-stain negative, motile by means of monotrichous flagella, short rod shaped and strictly aerobic. A phylogenetic tree was reconstructed based on their 16S rRNA gene sequences, which indicated that these two strains belong to the genus Lysobacter within the family Xanthomonadaceae. Strain D10T showed high 16S rRNA gene sequence similarities with Lysobacter humi FJY8T (99...
March 25, 2019: Antonie Van Leeuwenhoek
Yu Li, Hong-Qiu Yin, Jun Xia, Hong Luo, Ming-Yi Wang
The Gram-negative marine bacterium Vibrio parahaemolyticus has been identified as a major cause of bacterial food poisoning in China. Here, the population structure and genetic diversity of V. parahaemolyticus from Weihai, a coastal city in China, was studied by the multi-locus sequence typing (MLST) method. In this survey, we isolated 40 strains including environmental and clinical samples of patients with acute gastroenteritis or diarrhea; isolates from other countries were also included for comparison. DnaSP Version5, START V2, eBURST version3 and Mega 6 were used to analyse the data...
March 15, 2019: Antonie Van Leeuwenhoek
Jing Li, Wen Xin, Zhen-Zhen Xu, Fang-Qin Xiang, Jing-Jing Zhang, Li-Jun Xi, Jian-Bo Qu, Jian-Guo Liu
A Gram-stain negative, aerobic, motile, short rod-shaped bacterium, designated as B2.3T , was isolated from coal bed water collected from Jincheng, Shanxi Province, China. The strain was able to grow at 10-40 °C (optimum 28-30 °C), pH 4.0-10.0 (optimum 7.0), and in the presence of 0-5.0% NaCl (optimum 3.0%, w/v). Phylogenetic analysis based on the 16S rRNA and concatenated housekeeping gene recA, atpD and glnA sequences showed strain B2.3T belongs to the genus Mesorhizobium, with Mesorhizobium oceanicum B7T as the closely related type strain...
March 14, 2019: Antonie Van Leeuwenhoek
Vahideh Tarhriz, Setsuko Hirose, Shun-Ichi Fukushima, Mohammad Amin Hejazi, Johannes F Imhoff, Vera Thiel, Mohammad Saeid Hejazi
The genus Tabrizicola with its type species and strain Tabrizicola aquatica RCRI19T was previously described as a purely chemotrophic genus of Gram-negative, aerobic, non-motile and rod-shaped bacteria. With the present study, we expand the description of the metabolic capabilities of this genus and the T. aquatica type strain to include chlorophyll-dependent phototrophy. Our results confirmed that T. aquatica, does not grow under anaerobic photoautotrophic or photoheterotrophic conditions. However, the presence of the photosynthesis-related genes pufL and pufM could be demonstrated in the genomes of several Tabrizicola strains...
March 12, 2019: Antonie Van Leeuwenhoek
Maria da Conceição Marinho, Olga Maria Lage, Carla D Sousa, José Catita, Sara C Antunes
The daily use of the planctomycete Rhodopirellula rubra as an alternative or supplementary food source for Daphnia magna and its feasibility in the nutrition of transgenerational populations were studied. The life history parameters, fatty acids (saturated, mono- and polyunsaturated; SFAs, MUFAs and PUFAs), glycogen and protein contents of organisms during feeding assays and of the first generation were analysed. An increase in the yields of D. magna with the increase of the cell concentration of R. rubra was evident, but overall, bacteria supplied as the only food source was nutritionally insufficient as observed for all the parameters analysed...
March 11, 2019: Antonie Van Leeuwenhoek
Jun Lin, Guiqin Yang, Jia Tang, Zhen Li, Zhen Yu, Li Zhuang
A Gram-staining negative bacterium, designated as GSS15T , was isolated from compost in Guangzhou, China. Cells of strain GSS15T were rod-shaped and non-motile. The isolate was able to grow at 15-42 °C (optimum 30 °C) and pH 6.0-11.0 (optimum pH 8.0), and tolerate up to 6.0% NaCl (w/v). When the 16S rRNA gene sequence of the isolate was compared with those of other bacteria, the highest similarity was observed with Pseudoxanthomonas helianthi roo10T (96.9%). Furthermore, strain GSS15T showed low ANI (75...
March 9, 2019: Antonie Van Leeuwenhoek
Maria Letícia Bonatelli, Jaciane Lutz Ienczak, Carlos Alberto Labate
The presence of microbial contaminants is common in the sugarcane ethanol industry and can decrease process yield, reduce yeast cell viability and induce yeast cell flocculation. To evaluate the effect of microbial contamination on the fermentation process, we compared the use of sterilized and non-sterilized sugarcane must in the performance of Saccharomyces cerevisiae with similar fermentation conditions to those used in Brazilian mills. Non-sterilized sugarcane must had values of 103 and 108 CFU mL-1 of wild yeast and bacterial contamination, respectively; decreased total reducing sugar (TRS); and increased lactic and acetic acids, glycerol and ethanol concentrations during storage...
March 4, 2019: Antonie Van Leeuwenhoek
Marleny Burkett-Cadena, Leonardo Sastoque, Johanna Cadena, Christopher A Dunlap
A strain of a Gram-positive, strictly aerobic, motile, rod-shaped, endospore forming bacterium was originally isolated from rhizospheric soil of a pepper plant when screening and bioprospecting for plant beneficial microorganisms. Phylogenetic analysis of the 16S rRNA gene sequences indicated that this strain, PB300T , is closely related to Lysinibacillus macroides DMS 54T (99.6%) and Lysinibacillus xylanilyticus DSM 23493T (99.4%). In phenotypic characterisation, the novel strain was found to grow between 15 and 40 °C and tolerate up to 10% (w/v) NaCl...
February 28, 2019: Antonie Van Leeuwenhoek
Yingying Jiang, Hangxian Lai, Chunfeng Meng, Zehao Zheng, Qiao Guo, Quanhong Xue, Xiaomin Wei
A novel halophilic, Gram-positive and aerobic actinobacterium, designated strain AFM 20147T , was isolated from a sediment sample collected from Xiaochaidan Salt Lake of Qinghai, China. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain AFM 20147T belongs to the genus Saccharopolyspora, shows high sequence similarities to Saccharopolyspora griseoalba AFM 10238T (99.41%) and Saccharopolyspora halophila YIM 90500T (98.20%), and has low similarities (below 98.0%) with other members of the genus...
February 28, 2019: Antonie Van Leeuwenhoek
Gui Zhang, Jing Yang, Xin-He Lai, Shan Lu, Dong Jin, Ji Pu, Xiangning Bai, Xuelian Luo, Yanwen Xiong, Ying Huang, Cuixia Chen, Jianguo Xu
Two Gram-stain negative, catalase positive, coccus shaped bacteria, designated 10023T and 10010, were isolated from the rectal contents of a plateau pika (Ochotona curzoniae) in Qinghai-Tibet Plateau, China. Based on 16S rRNA gene sequence analysis, phylogenetic trees showed that these two isolates (10023T , 10010) group with members of the genus Neisseria. Additionally, these two isolates exhibited high 16S rRNA gene sequence similarity with Neisseria zalophi CSL 7565T (96.98%), Neisseria wadsworthii WC 05-9715T (96...
February 24, 2019: Antonie Van Leeuwenhoek
Inam Ullah Khan, Neeli Habib, Min Xiao, Meng-Meng Li, Wen-Dong Xian, Mohammad Saeid Hejazi, Vahideh Tarhriz, Xiao-Yang Zhi, Wen-Jun Li
An ovoid to rod-shaped, phototrophic, purple non-sulfur bacterium was isolated from a sediment sample of a hot spring in Tibet, China. Cells of strain YIM 73036T were Gram-stain negative, non-motile and multiplied by binary fission. Strain YIM 73036T grew optimally at pH 7.0-7.5 at 37-45 °C. Growth occurred in 0.5-3.5% (w/v) NaCl. Vitamins were not required for growth. The presence of photosynthesis genes pufL and pufM were shown and photosynthesis pigments were formed. Bacteriochlorophyll α, the bacteriopheophytin and carotenoids were present as photosynthetic pigments...
February 23, 2019: Antonie Van Leeuwenhoek
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