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https://www.readbyqxmd.com/read/29330702/ptac10-an-s1-domain-containing-component-of-the-transcriptionally-active-chromosome-complex-is-essential-for-plastid-gene-expression-in-arabidopsis-thaliana-and-is-phosphorylated-by-chloroplast-targeted-casein-kinase-ii
#1
Qing-Bo Yu, Tuan-Tuan Zhao, Lin-Shan Ye, Ling Cheng, Ying-Qian Wu, Chao Huang, Zhong-Nan Yang
In higher plant chloroplasts, the plastid-encoded RNA polymerase (PEP) consists of four catalytic subunits and numerous nuclear-encoded accessory proteins, including pTAC10, an S1-domain-containing protein. In this study, pTAC10 knockout lines were characterized. Two ptac10 mutants had an albino phenotype and severely impaired chloroplast development. The pTAC10 genomic sequence fused to a four-tandem MYC tag driven by its own promoter functionally complemented the ptac10-1 mutant phenotype. pTAC10 was present in both the chloroplast stroma and thylakoids...
January 12, 2018: Photosynthesis Research
https://www.readbyqxmd.com/read/29310897/vicia-faba-l-in-the-bejaia-region-of-algeria-is-nodulated-by-rhizobium-leguminosarum-sv-viciae-rhizobium-laguerreae-and-two-new-genospecies
#2
Djellali Belhadi, Philippe de Lajudie, Nacer Ramdani, Christine Le Roux, Farida Boulila, Pierre Tisseyre, Abdelghani Boulila, Amar Benguedouar, Yahia Kaci, Gisèle Laguerre
Fifty-eight rhizobial strains were isolated from root nodules of Vicia faba cv. Equina and Vicia faba cv. Minor by the host-trapping method in soils collected from eleven sites in Bejaia, Eastern Algeria. Eleven genotypic groups were distinguished based on the combined PCR/RFLP of 16S rRNA, 16S-23S rRNA intergenic spacer and symbiotic (nodC and nodD-F) genes and further confirmed by multilocus sequence analysis (MLSA) of three housekeeping genes (recA, atpD and rpoB), the 16S rRNA gene and the nodulation genes nodC and nodD...
December 27, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/29310751/multi-clonal-evolution-of-multi-drug-resistant-extensively-drug-resistant-mycobacterium-tuberculosis-in-a-high-prevalence-setting-of-papua-new-guinea-for-over-three-decades
#3
Arnold Bainomugisa, Evelyn Lavu, Stenard Hiashiri, Suman Majumdar, Alice Honjepari, Rendi Moke, Paison Dakulala, Grant A Hill-Cawthorne, Sushil Pandey, Ben J Marais, Chris Coulter, Lachlan Coin
An outbreak of multi-drug resistant (MDR) tuberculosis (TB) has been reported on Daru Island, Papua New Guinea. Mycobacterium tuberculosis strains driving this outbreak and the temporal accrual of drug resistance mutations have not been described. Whole genome sequencing of 100 of 165 clinical isolates referred from Daru General Hospital to the Supranational reference laboratory, Brisbane, during 2012-2015 revealed that 95 belonged to a single modern Beijing sub-lineage strain. Molecular dating suggested acquisition of streptomycin and isoniazid resistance in the 1960s, with potentially enhanced virulence mediated by an mycP1 mutation...
January 4, 2018: Microbial Genomics
https://www.readbyqxmd.com/read/29303698/reclassification-of-bisgaard-taxon-5-as-caviibacterium-pharyngocola-gen-nov-sp-nov-and-bisgaard-taxon-7-as-conservatibacter-flavescens-gen-nov-sp-nov
#4
Sadhana Adhikary, Magne Bisgaard, Werner Nicklas, Henrik Christensen
A total of 29 strains mainly from guinea pigs were investigated by a polyphasic approach that included previously published data. The strains were classified as Bisgaard taxa 5 and 7 by comparison of phenotypic characteristics and the strains showed typical cultural characteristics for members of family Pasteurellaceae and the strains formed two monophyletic groups based on 16S rRNA gene sequence comparison. Partial rpoB sequence analysis as well as published data on DNA-DNA hybridization showed high genotypic relationships within both groups...
January 5, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29300153/bifidobacterium-catulorum-sp-nov-a-novel-taxon-from-the-faeces-of-the-baby-common-marmoset-callithrix-jacchus
#5
Monica Modesto, Samanta Michelini, Kaihei Oki, Bruno Biavati, Koichi Watanabe, Paola Mattarelli
In our previous study based on hsp60 PCR-restriction fragment length polymorphism and 16S rRNA gene sequencing, we stated that the bifidobacterial strains isolated from the individual faecal samples of five baby common marmosets constituted different phylogenetically isolated groups of the genus Bifidobacterium. In that study, we also proposed that these isolated groups potentially represented novel species of the genus Bifidobacterium. Out of them, Bifidobacterium aesculapii, Bifidobacterium myosotis, Bifidobacterium tissieri and Bifidobacterium hapali, have been described recently...
January 4, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29298099/propidium-monoazide-quantitative-real-time-polymerase-chain-reaction-for-enumeration-of-some-viable-but-nonculturable-foodborne-bacteria-in-meat-and-meat-products
#6
Norhan Khairy Abd El-Aziz, Yasmine Hasanine Tartor, Ahlam Abd El-Aziz Gharib, Ahmed Mohamed Ammar
Foodborne infections due to bacterial pathogens are increasing worldwide. Given the surreptitious nature of viable but nonculturable (VBNC) bacteria, they largely remain a threat to public health and food safety due to their non-detectability through conventional plate count techniques. Hence, species-specific quantitative real-time polymerase chain reaction (PCR) (qPCR) alone and combined with the use of propidium monoazide (PMA) was used along with the plate count method to quantify VBNC Staphylococcus aureus, Bacillus cereus, Clostridium perfringens, and Enterobacteriaceae in fresh and processed meat samples...
January 3, 2018: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/29297845/proteus-columbae-sp-nov-isolated-from-a-pigeon-in-ma-anshan-china
#7
Hang Dai, Yonglu Wang, Yujie Fang, Tao Xiao, Zhenzhou Huang, Biao Kan, Duochun Wang
A Gram-negative, facultatively anaerobic bacillus, strain 08MAS2615T, was isolated from the flesh of a pigeon specimen collected in Ma'anshan, Anhui province, China. Phylogenetic analysis of 16S rRNA gene sequences confirmed that strain 08MAS2615T belonged to the genus Proteus, and formed an independent branch which was clearly separated from the other six known species of Proteus. Strain 08MAS2615T was more closely related to Proteus vulgaris ATCC 29905T and Proteus penneri NCTC 12737T than other Proteus species...
January 3, 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29297829/occurrence-of-pasteurellaceae-bacteria-in-the-oral-cavity-of-selected-marsupial-species
#8
Mie Johanne Hansen, Mads F Bertelsen, Androo Kelly, Anders Miki Bojesen
Eighty-two Pasteurellaceae isolates from marsupials characterized by phylogenetic analysis of rpoB gene sequences formed five distinct groups. Twenty-one strains from long-nosed potoroos ( Potorous tridactylus apicalis), spotted-tailed quolls ( Dasyurus maculatus), and eastern quolls ( Dasyurus viverrinus) made up group 1, which classified with Frederiksenia canicola. Group 2, 15 strains from Tasmanian devils ( Sarcophilus harrisii), common wombats ( Vombatus ursinus), common ring-tailed possums ( Pseudocheirus peregrinus), and eastern quolls, grouped with Pasteurella multocida...
December 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/29287710/rifampin-resistance-in-staphylococcus-epidermidis-molecular-characterization-and-fitness-cost-of-rpob-mutations
#9
Yu Mi Wi, Kerryl E Greenwood-Quaintance, Cassandra L Brinkman, Jean Y H Lee, Benjamin P Howden, Robin Patel
Molecular mechanisms and characteristics of rifampin resistance in Staphylococcus epidermidis are poorly characterized, even though S. epidermidis is one of the most common nosocomial pathogens associated with indwelling medical device-related infections. The aim of this study was to investigate the evolution of rifampin resistance and to characterize the associated molecular mechanisms in S. epidermidis. Rifampin-resistant mutants from two rifampin-susceptible S. epidermidis strains, RP62A and IDRL-8883, were selected through in vitro and in vivo exposure to rifampin...
December 26, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29283077/species-distribution-sequence-types-and-antimicrobial-resistance-of-acinetobacter-spp-from-cystic-fibrosis-patients
#10
G A Rocha, D F Lima, E R Rodrigues, R S Leão, T W Folescu, M C Firmida, R W F Cohen, R M Albano, E A Marques
Acinetobacter spp. are important healthcare pathogens, being closely linked to antibiotic resistance and outbreaks worldwide. Although such species are rarely observed in patients with cystic fibrosis (CF), we describe the characteristics of 53 strains of Acinetobacter spp. isolated from the sputum of 39 Brazilian patients with CF. The species distribution was A. baumannii (n = 29), A. pittii (n = 13), A. nosocomialis (n = 8), A. seifertii (n = 1), A. soli (n = 1) and A. variabilis (n = 1) determined by partial rpoB gene sequencing...
December 28, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/29242075/molecular-drug-resistance-profiles-of-mycobacterium-tuberculosis-from-sputum-specimens-using-ion-semiconductor-sequencing
#11
Joonhong Park, Woori Jang, Myungshin Kim, Yonggoo Kim, So Youn Shin, Kuhn Park, Myung Sook Kim, Soyoung Shin
The increasing burden of multidrug resistant (MDR)-TB, defined by resistance to rifampin (RFP) and isoniazid (INH), and extensively drug resistant-TB, defined by MDR-TB with additional resistance to fluoroquinolones (FQs) and more than one second-line injectable drug, is a serious impediment to global TB control. We evaluated the feasibility of full-length gene analysis including inhA, katG, rpoB, pncA, rpsL embB, eis, and gyrA using a semiconductor NGS with the Ion AmpliSeq TB panel to directly analyse 34 sputum specimens confirmed by phenotypic DST: INH, RFP, ethambutol (EMB), pyrazinamide (PZA), amikacin, kanamycin, streptomycin (SM), FQs including ofloxacin, moxifloxacin, and levofloxacin...
December 11, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/29239716/pseudomonas-fluvialis-sp-nov-a-novel-member-of-the-genus-pseudomonas-isolated-from-the-river-ganges-india
#12
Sarabjeet Kour Sudan, Deepika Pal, Bhawana Bisht, Narender Kumar, Vasvi Chaudhry, Prabhu Patil, Girish Sahni, Shanmugam Mayilraj, Srinivasan Krishnamurthi
A bacterial strain, designated ASS-1T, was isolated and identified from a sediment sample of the river Ganges, Allahabad, India. The strain was Gram-stain-negative, formed straw-yellow pigmented colonies, was strictly aerobic, motile with a single polar flagellum, and positive for oxidase and catalase. The major fatty acids were C16 : 1ω7c/ 16 : 1 C16 : 1ω6c, C18 : 1ω7c and C16 : 0. Sequence analysis based on the 16S rRNA gene revealed that strain ASS-1T showed high similarity to Pseudomonas guguanensis CC-G9AT (98...
December 14, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29235263/detection-and-genetic-characterization-of-diverse-bartonella-genotypes-in-the-small-mammals-of-singapore
#13
E S Neves, I H Mendenhall, S A Borthwick, Y C F Su, G J D Smith
Bartonella species are arthropod-borne bacterial pathogens that infect numerous mammalian species. Small mammals play an important role as natural reservoirs of many Bartonella species, maintaining the greatest diversity of Bartonella described to date. Although Bartonella research has been conducted in Southeast Asia, no studies have been undertaken on small mammals in Singapore. Here, we report the detection and description of Bartonella in small mammals in Singapore during the period of November 2011 to May 2014...
December 12, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/29230198/commentary-rifabutin-resistance-associated-with-double-mutations-in-rpob-gene-in-mycobacterium-tuberculosis-isolates
#14
COMMENT
Sandeep Sharma, Noton K Dutta
No abstract text is available yet for this article.
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29227219/halorubrum-aethiopicum-sp-nov-an-extremely-halophilic-archaeon-isolated-from-commercial-rock-salt
#15
Ashagrie Gibtan, Hye Seon Song, Joon Yong Kim, Yeon Bee Kim, Nakyeong Park, Kyounghee Park, Sang-Jae Lee, Joseph Kwon, Seong Woon Roh, Han-Seung Lee
A novel extremely halophilic archaeon, designated SAH-A6T, was isolated from a sample of commercial rock salt in Ethiopia. Cells of SAH-A6T were aerobic and pleomorphic. The strain was able to grow at concentrations of 15-30 % (w/v) NaCl (optimum 20-25 % NaCl), at pH 6.0-9.0 (optimum pH 7.0) and in a temperature range of 30-55 °C (optimum 37-45 °C). Mg2+ was not required for growth of SAH-A6T cells. On the basis of 16S rRNA gene sequence analysis, strain SAH-A6T was closely related to Halorubrum halodurans Cb34T (99...
December 11, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29225973/molecular-epidemiology-of-rifampicin-resistance-in-mycobacterium-tuberculosis-using-the-genexpert-mtb-rif-assay-from-a-rural-setting-in-india
#16
Raghuprakash Reddy, Gerardo Alvarez-Uria
The Xpert MTB/RIF assay can detect mutations in rpoB gene that confer rifampicin resistance (RR) using five overlapping probes (A, B, C, D, and E). In this study, we described our experience with the Xpert assay in a rural setting in India. During the study period, 3250 samples were processed. The result was unsuccessful in 5.7% of cases. For extrapulmonary specimens, the risk of unsuccessful result was higher in tissue biopsy and stool samples. Among samples positive for Mycobacterium tuberculosis, rifampicin resistance was indeterminate in 1...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/29221301/matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-a-powerful-tool-for-identification-of-corynebacterium-species
#17
Rong Bao, Xiaodong Gao, Bijie Hu, Zhaoyan Zhou
Background: Matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) is a powerful tool that has initiated a revolution in the clinical microbiology laboratory for identification of nosocomial pathogens. The efficacy of MALDI-TOF MS produced by bioMerieux, Marcy l'Etoile, France (VITEK MS) for detecting Corynebacterium remains unknown. Methods: Corynebacterium isolates were isolated from clinical specimen in a tertial teaching hospital from 2012 to 2013...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29218414/cyclic-lipopeptide-signature-as-fingerprinting-for-the-screening-of-halotolerant-bacillus-strains-towards-microbial-enhanced-oil-recovery
#18
Bárbara C S Farias, Denise C Hissa, Camila T M do Nascimento, Samuel A Oliveira, Davila Zampieri, Marcos N Eberlin, Deivid L S Migueleti, Luiz F Martins, Maíra P Sousa, Danuza N Moyses, Vânia M M Melo
Cyclic lipopeptides (CLPs) are non-ribosomal biosurfactants produced by Bacillus species that exhibit outstanding interfacial activity. The synthesis of CLPs is under genetic and environmental influence, and representatives from different families are generally co-produced, generating isoforms that differ in chemical structure and biological activities. This study to evaluate the effect of low and high NaCl concentrations on the composition and surface activity of CLPs produced by Bacillus strains TIM27, TIM49, TIM68, and ICA13 towards microbial enhanced oil recovery (MEOR)...
December 7, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29217277/absence-of-hybridization-with-the-wild-type-and-mutant-rpob-probes-in-the-genotype-mtbdrplus-assay-detects-disputed-rifampicin-mutations
#19
Ngu Njei Abanda, Josiane Yvonne Djieugoué, Vedbar S Khadka, Eric Walter Pefura-Yone, Wilfred Fon Mbacham, Guy Vernet, Veronique Mbeng Penlap, Youping Deng, Sara Irene Eyangoh, Diane Wallace Taylor, Rose Gana Fomban Leke
OBJECTIVE: Mycobacterium tuberculosis isolates that fail to hybridize to at least one rpoB wildtype or any mutation probe on the Genotype MTBDRplus strip are assumed Rifampicin-resistant. However, the precise mutation(s) are unknown. We sought to identify the mutations in isolates with such hybridization patterns and determine if the mutations are associated with resistance to Rifampicin. METHODS: In this study, 275 M. tuberculosis isolates were screened with the Genotype MTBDRplus assay to identify isolates with the hybridization pattern...
December 4, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29216262/direct-detection-of-mycobacterium-tuberculosis-rifampin-resistance-in-bio-safe-stained-sputum-smears
#20
Surabhi Lavania, Divya Anthwal, Manpreet Bhalla, Nagendra Singh, Sagarika Haldar, Jaya Sivaswami Tyagi
Direct smear microscopy of sputum forms the mainstay of TB diagnosis in resource-limited settings. Stained sputum smear slides can serve as a ready-made resource to transport sputum for molecular drug susceptibility testing. However, bio-safety is a major concern during transport of sputum/stained slides and for laboratory workers engaged in processing Mycobacterium tuberculosis infected sputum specimens. In this study, a bio-safe USP (Universal Sample Processing) concentration-based sputum processing method (Bio-safe method) was assessed on 87 M...
2017: PloS One
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