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https://www.readbyqxmd.com/read/28933015/deep-brain-stimulator-infection-by-a-novel-rapid-growing-mycobacterium
#1
Donna C Moritz, Amanda T Harrington, Konstantin Slavin, Christy Gomez, Olamide D Jarrett
Devise-related infections after deep brain stimulator implantation are not uncommon. However, infections due to mycobacteria have not been reported in the medical literature. We describe the first reported case of DBS infection due to a novel rapidly growing mycobacteria, most closely resembling Mycobacterium goodii, by rpoB gene sequencing.
September 20, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28932221/diversity-of-vibrio-navarrensis-revealed-by-genomic-comparison-veterinary-isolates-are-related-to-strains-associated-with-human-illness-and-sewage-isolates-while-seawater-strains-are-more-distant
#2
Keike Schwartz, Cindy Kukuc, Nadja Bier, Karin Taureck, Jens A Hammerl, Eckhard Strauch
Strains of Vibrio navarrensis are present in aquatic environments like seawater, rivers, and sewage. Recently, strains of this species were identified in human clinical specimens. In this study, V. navarrensis strains isolated from livestock in Germany were characterized that were found in aborted fetuses and/or placentas after miscarriages. The veterinary strains were analyzed using phenotypical and genotypical methods and compared to isolates from marine environments of the Baltic Sea and North Sea. The investigated phenotypical traits were similar in all German strains...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28931561/genetic-mimetics-of-mycobacterium-tuberculosis-and-methicillin-resistant-staphylococcus-aureus-as-verification-standards-for-molecular-diagnostics
#3
Edith Erika Machowski, Bavesh Davandra Kana
Molecular diagnostics have revolutionized the management of health care through enhanced detection of disease or infection and effective engagement into care. In recognition of this, the World Health Organization approved the rollout out of nucleic acid amplification technologies for identification of Mycobacterium tuberculosis using platforms such as GeneXpert MTB/RIF, the GenoType MTBDRplus Line Probe Assay and more recently, GeneXpert MTB/RIF Ultra. These assays can simultaneously detect tuberculosis infection and assess rifampicin resistance...
September 20, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28930567/molecular-mechanisms-of-chlamydia-trachomatis-resistance-to-antimicrobial-drugs
#4
Tomislav Mestrovic, Suncanica Ljubin-Sternak
Chlamydia trachomatis (C. trachomatis) is a leading cause of bacterial sexually transmitted infections in developed and undeveloped countries, and therefore a global public health issue. In an era of increasing bacterial resistance to antibiotics, resistance has been an exceedingly rare phenomenon in C. trachomatis; however, clinical treatment failures attributed to multidrug-resistant C. trachomatis strains have been described on several occasions. Cell culture systems using McCoy cells and subsequent immunofluorescent staining are still the most common methodology used for antimicrobial susceptibility testing, but the presence of resistance markers should be appraised by further genetic analysis...
January 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/28925024/complete-characterization-of-new-isolates-of-neptunomonas-phycophila-leads-to-emend-its-description-and-opens-possibilities-of-biotechnological-applications
#5
Ana L Diéguez, Phillip Pichon, Sabela Balboa, Thorolf Magnesen, Jesús L Romalde
Five strains were isolated from gonad of Great scallop (Pecten maximus) broodstock in a Norwegian hatchery. The study of 16S rRNA gene sequences showed that these isolates belong to Neptunomonas phycophila, a bacterium originally isolated from a symbiont of the anemone Aiptasia tagetes from Puerto Rico. The gyrB and rpoB genes sequences confirmed the affiliation of the scallop isolates to this species. Phenotypic characterization was performed and some differences between the Norwegian isolates and the type strain of N...
September 18, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28920836/mycobacterium-aquiterrae-sp-nov-a-rapidly-growing-bacterium-isolated-from-groundwater
#6
Jae-Chan Lee, Kyung-Sook Whang
A strain representing a rapidly growing, Gram-stain-positive, aerobic, rod-shaped, non-motile, non-sporulating and non-pigmented species of the genus Mycobacterium, designated strain S-I-6T, was isolated from groundwater at Daejeon in Korea. The strain grew at temperatures between 10 and 37 °C (optimal growth at 25 °C), between pH 4.0 and 9.0 (optimal growth at pH 7.0) and at salinities of 0-5 % (w/v) NaCl, growing optimally with 2 % (w/v) NaCl. Phylogenetic analyses based on multilocus sequence analysis of the 16S rRNAgene, hsp65, rpoB and the 16S-23S internal transcribed spacer indicated that strain S-I-6T belonged to the rapidly growing mycobacteria, being most closely related to Mycobacterium sphagni...
September 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28906179/multi-locus-sequence-types-of-mycoplasma-bovis-isolated-from-ontario-canada-in-the-past-three-decades-have-a-temporal-distribution
#7
Patricia Bell-Rogers, Lois Parker, Hugh Y Cai
A total of 217 Mycoplasma bovis isolates cultured from clinical cases in Ontario, Canada, over the past 30 y were selected to be characterized by a multi-locus sequence typing (MLST) method. Eleven housekeeping genes were evaluated for suitability for MLST; 2 loci that had been used in prior MLST schemes, dnaN and metS, along with hsp70 were chosen for further sequence analysis. The remaining loci- adk, efp, gmk, gyrB, polC, rpoB, tpiA, and uvrC genes-were not used because they had little to no sequence variation...
September 1, 2017: Journal of Veterinary Diagnostic Investigation
https://www.readbyqxmd.com/read/28905703/saliphagus-infecundisoli-gen-nov-sp-nov-an-extremely-halophilic-archaeon-isolated-from-a-saline-soil
#8
Xiao-Qing Yin, Bing-Bing Liu, Xiao Chu, Nimaichand Salam, Xin Li, Zi-Wen Yang, Yao Zhang, Min Xiao, Wen-Jun Li
Two extremely halophilic archaea, strains YIM 93745T and YIM 93707, were isolated from a saline soil sample collected from Loulan, China. Cells of the two strains were coccus, non-motile and Gram-stain negative. The strains were aerobic and grew at 25-50 °C (optimum, 37 °C), in the presence of 5-35 % (w/v) NaCl (optimum, 20 %), 0.01-0.1 M Mg2+ (optimum, 0.03 M) and pH 6.0-8.5 (optimum, 7.0-7.5). Cells lysed in distilled water and with 0-5 % NaCl. Major polar lipids were phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, phosphatidylglycerol sulfate, sulfated mannosyl glycosyl diether and two unidentified glycolipids...
September 14, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28904673/mutations-in-rpob-and-katg-genes-of-multidrug-resistant-mycobacterium-tuberculosis-undetectable-using-genotyping-diagnostic-methods
#9
Faustinos Tatenda Takawira, Racheal Shamiso Dube Mandishora, Zephaniah Dhlamini, Ellen Munemo, Babill Stray-Pedersen
INTRODUCTION: Tuberculosis remains the leading causes of death worldwide with frequencies of mutations in rifampicin and isoniazid resistant Mycobacterium tuberculosis isolates varying according to geographical location. There is limited information in Zimbabwe on specific antibiotic resistance gene mutation patterns in MTB and hence, increased rate of discordant results and mortality due to inappropriate antibiotic prescriptions. The rpoB and katG genes molecular markers are used for detecting rifampicin and isoniazid resistance respectively...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28901903/halobacterium-litoreum-sp-nov-isolated-from-a-marine-solar-saltern
#10
Zhen-Zhen Lü, Yang Li, Yao Zhou, Heng-Lin Cui, Zheng-Rong Li
Halophilic archaeal strain ZS-54-S2T was isolated from Zhoushan marine solar saltern, China. Cells were rod-shaped, Gram-stain-negative and formed red-pigmented colonies on an agar plate. Strain ZS-54-S2T was able to grow at 20-50 °C (optimum 35 °C), at 1.7-4.8 M NaCl (optimum 3.9 M), at 0.005-1.0 M MgCl2 (optimum 0.05 M) and at pH 5.0-9.5 (optimum pH 7.0). The cells lysed in distilled water and the minimal NaCl concentration to prevent cell lysis was found to be 5 % (w/v). The major polar lipids of the strain were phosphatidic acid, phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, two glycolipids, which were chromatographically identical to sulfated galactosyl mannosyl galactofuranosyl glucosyl diether and galactosyl mannosyl glucosyl diether, and an unidentified glycolipid, which was chromatographically identical to one detected in Halobacterium salinarum ATCC 33171T...
September 13, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28900077/-the-spectrum-of-mutations-in-genes-associated-with-resistance-to-rifampicin-isoniazid-and-fluoroquinolones-in-the-clinical-strains-of-m-tuberculosis-reflects-the-transmissibility-of-mutant-clones
#11
A Ergeshov, S N Andreevskaya, E E Larionova, T G Smirnova, L N Chernousova
To study the transmissibility of drug resistant mutant clones, M. tuberculosis samples were isolated from the patients of the clinical department and the polyclinic of the Central TB Research Institute (n = 1455) for 2011-2014. A number of clones were phenotypically resistant to rifampicin (n = 829), isoniazid (n = 968), and fluoroquinolones (n = 220). We have detected 21 resistance-associated variants in eight codons of rpoB, six variants in three codons of katG, three variants in two positions of inhA, four variants in four positions of ahpC, and nine variants in five codons of gyrA, which were represented in the analyzed samples with varied frequencies...
July 2017: Molekuliarnaia Biologiia
https://www.readbyqxmd.com/read/28895525/description-of-mycobacterium-chelonae-subsp-bovis-subsp-nov-isolated-from-cattle-bos-taurus-coreanae-emended-description-of-mycobacterium-chelonae-and-creation-of-mycobacterium-chelonae-subsp-chelonae-subsp-nov
#12
Byoung-Jun Kim, Ga-Na Kim, Bo-Ram Kim, Che Ok Jeon, Joseph Jeong, Seon Ho Lee, Ji-Hun Lim, Seung-Heon Lee, Chang Ki Kim, Yoon-Hoh Kook, Bum-Joon Kim
Three rapidly growing mycobacterial strains, QIA-37T, QIA-40 and QIA-41, were isolated from the lymph nodes of three separate Korean native cattle, Hanwoo (Bos taurus coreanae). These strains were previously shown to be phylogenetically distinct but closely related to Mycobacterium chelonae ATCC 35752T by taxonomic approaches targeting three genes (16S rRNA, hsp6 and rpoB) and were further characterized using a polyphasic approach in this study. The 16S rRNA gene sequences of all three strains showed 99.7 % sequence similarity with that of the M...
September 12, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28895509/mycoplasma-tullyi-sp-nov-isolated-from-penguins-of-the-genus-spheniscus
#13
Christine A Yavari, Ana S Ramírez, Robin A J Nicholas, Alan D Radford, Alistair C Darby, Janet M Bradbury
A mycoplasma isolated from the liver of a dead Humboldt penguin (Spheniscus humboldti) and designated strain 56A97T, was investigated to determine its taxonomic status. Complete 16S rRNA gene sequence analysis indicated that the organism was most closely related to Mycoplasma gallisepticum and Mycoplasma imitans(99.7 and 99.9 % similarity, respectively). The average DNA-DNA hybridization values between strain 56A97T and M. gallisepticum and M. imitans were 39.5 and 30 %, respectively and the Genome to Genome Distance Calculator gave results of 29...
September 12, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28893355/bifidobacterium-vansinderenii-sp-nov-isolated-from-faeces-of-emperor-tamarin-saguinus-imperator
#14
Sabrina Duranti, Marta Mangifesta, Gabriele Andrea Lugli, Francesca Turroni, Rosaria Anzalone, Christian Milani, Leonardo Mancabelli, Maria Cristina Ossiprandi, Marco Ventura
A novel Bifidobacterium strain, Tam10BT, i.e. LMG 30126T, was isolated from emperor tamarin (Saguinus imperator). Cells were Gram-positive, non-motile, non-sporulating, non-haemolytic, facultative anaerobic and fructose 6-phosphate phosphoketolase-positive. Phylogenetic analyses based on 16S rRNA genes as well as multilocus sequences (representing hsp60, rpoB, dnaJ, dnaG and clpC genes) and the core genome revealed that Bifidobacterium Tam10BT exhibited close phylogenetic relatedness to Bifidobacterium tissieri DSM 100201T...
September 12, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28888870/efficient-differentiation-of-corynebacterium-striatum-corynebacterium-amycolatum-and-corynebacterium-xerosis-clinical-isolates-by-multiplex-pcr-using-novel-species-specific-primers
#15
Carolina S Santos, Juliana N Ramos, Veronica V Vieira, Carina S Pinheiro, Roberto Meyer, Neuza M Alcantara-Neves, Rommel T Ramos, Artur Silva, Raphael Hirata, Liza Felicori, Carlos Ruiz de Alegría Puig, Jesús Navas, Vasco Azevedo, Ana L Mattos-Guaraldi, Luis G C Pacheco
A multiplex-PCR (mPCR) assay was designed with species-specific primers which generate amplicons of 226bp, 434bp and 106bp for differentiating the species C. striatum, C. amycolatum, and C. xerosis, respectively. mPCR results were 100% in agreement with identifications achieved by 16S rRNA and rpoB gene sequencing and by VITEK-MS.
September 6, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28884143/use-of-genotype-mtbdrplus-assay-for-diagnosis-of-multidrug-resistant-tuberculosis-in-nepal
#16
Elina Maharjan, Narayan Dutt Pant, Sanjeev Neupane, Jyoti Amatya, Bhawana Shrestha
The main aims of this study were to study the patterns of mutations in rpoB, katG, and inhA genes in Mycobacterium tuberculosis strains isolated from patients from Nepal and to evaluate the performance of genotype MTBDRplus assay, taking conventional drug susceptibility testing as gold standard for diagnosis of MDR-TB. A total of 69 Mycobacterium tuberculosis strains isolated from 73 smear positive sputum samples from patients suspected of suffering from multidrug-resistant tuberculosis were used in our study...
2017: International Scholarly Research Notices
https://www.readbyqxmd.com/read/28879159/molecular-characterisation-of-rifampicin-resistant-mycobacterium-tuberculosis-strains-from-malawi
#17
Tarsizio Chikaonda, Irene Ketseoglou, Nelson Nguluwe, Robert Krysiak, Isaac Thengolose, Felix Nyakwawa, Nora E Rosenberg, Christopher Stanley, James Mpunga, Irving F Hoffman, Maria A Papathanasopoulos, Mina Hosseinipour, Lesley Scott, Wendy Stevens
BACKGROUND: Availability and access to the detection of resistance to anti-tuberculosis drugs remains a significant challenge in Malawi due to limited diagnostic services. The Xpert(®) MTB/RIF can detect Mycobacterium tuberculosis and resistance to rifampicin in a single, rapid assay. Rifampicin-resistant M. tuberculosis has not been well studied in Malawi. OBJECTIVES: We aimed to determine mutations in the rifampicin resistance determining region (RRDR) of the rpoB gene of M...
2017: African Journal of Laboratory Medicine
https://www.readbyqxmd.com/read/28875907/salinirussus-salinus-gen-nov-sp-nov-isolated-from-a-marine-solar-saltern
#18
Heng-Lin Cui, Zhen-Zhen Lü, Yang Li, Yao Zhou
A halophilic archaeal strain, YGH44T, was isolated from the Yinggehai marine solar saltern in Hainan Province of China. Cells were rod-shaped, stained Gram-negative and formed red-pigmented colonies on agar plates. Optimal growth was obtained with 3.4 M NaCl (range: 2.6-4.8 M), 0.5 M MgCl2 (range: 0.005-1.0 M), at 37 °C (range: 25-55 °C) and at pH 7.0 (range: pH 5.0-9.0). The cells lysed in distilled water, and the minimal NaCl concentration to prevent cell lysis was 1.7 M. Phylogenetic tree reconstructions based on 16S rRNA genes and rpoB' genes revealed that strain YGH44T was distinct from the related genera, Halovenus, Halapricum, Halorientalis, Halorhabdus and Halosimplex of the order Halobacteriales...
September 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28870771/identification-and-antimicrobial-susceptibility-of-clinical-nocardia-species-in-a-tertiary-hospital
#19
Ming Wei, Peng Wang, Jiuxin Qu, Ran Li, Yongzhe Liu, Li Gu, Chunxia Yang
OBJECTIVES: The aim of this study was to determine the antibiotic susceptibility of 28 clinical isolates of Nocardia species isolated from Beijing Chao-Yang Hospital, for reducing the insufficiency of information on antimicrobial activities of Nocardia clinical isolates in specific species in China. METHODS: Molecular diagnosis of Nocardia species was performed using partial 16S rRNA and rpoB gene sequences. Antimicrobial susceptibility testing by broth microdilution was performed according to the Clinical and Laboratory Standards Institute recommendations...
September 1, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28869002/mycobacterium-eburneum-sp-nov-a-non-chromogenic-fast-growing-strain-isolated-from-sputum
#20
Imen Nouioui, Lorena Carro, Kanae Teramoto, José M Igual, Marlen Jando, Maria Del Carmen Montero-Calasanz, Iain Sutcliffe, Vartul Sangal, Michael Goodfellow, Hans-Peter Klenk
A polyphasic study was undertaken to establish the taxonomic position of a non-chromogenic, rapidly growing Mycobacterium strain that had been isolated from sputum. The strain, CECT 8775T, has chemotaxonomic and cultural properties consistent with its classification in the genus Mycobacterium and was distinguished from the type strains of closely related mycobacterial species, notably from Mycobacterium paraense DSM 46749T, its nearest phylogenetic neighbour, based on 16S rRNA, hsp65 and rpoB gene sequence data...
September 2017: International Journal of Systematic and Evolutionary Microbiology
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