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Acinetobacter calcoaceticus

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https://www.readbyqxmd.com/read/28893978/gut-bacteria-from-multiple-sclerosis-patients-modulate-human-t-cells-and-exacerbate-symptoms-in-mouse-models
#1
Egle Cekanaviciute, Bryan B Yoo, Tessel F Runia, Justine W Debelius, Sneha Singh, Charlotte A Nelson, Rachel Kanner, Yadira Bencosme, Yun Kyung Lee, Stephen L Hauser, Elizabeth Crabtree-Hartman, Ilana Katz Sand, Mar Gacias, Yungjiao Zhu, Patrizia Casaccia, Bruce A C Cree, Rob Knight, Sarkis K Mazmanian, Sergio E Baranzini
The gut microbiota regulates T cell functions throughout the body. We hypothesized that intestinal bacteria impact the pathogenesis of multiple sclerosis (MS), an autoimmune disorder of the CNS and thus analyzed the microbiomes of 71 MS patients not undergoing treatment and 71 healthy controls. Although no major shifts in microbial community structure were found, we identified specific bacterial taxa that were significantly associated with MS. Akkermansia muciniphila and Acinetobacter calcoaceticus, both increased in MS patients, induced proinflammatory responses in human peripheral blood mononuclear cells and in monocolonized mice...
September 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28789688/an-in-vitro-synthetic-biosystem-based-on-acetate-for-production-of-phloroglucinol
#2
Rubing Zhang, Wei Liu, Yujin Cao, Xin Xu, Mo Xian, Huizhou Liu
BACKGROUND: Phloroglucinol is an important chemical, and the biosynthesis processes which can convert glucose to phloroglucinol have been established. However, due to approximate 80% of the glucose being transformed into undesirable by-products and biomass, this biosynthesis process only shows a low yield with the highest value of about 0.20 g/g. The industrial applications are usually hindered by the low current productivity and yield and also by the high costs. Generally, several different aspects limit the development of phloroglucinol biosynthesis...
August 8, 2017: BMC Biotechnology
https://www.readbyqxmd.com/read/28774994/erratum-for-ho-et-al-complete-genome-sequence-of-acinetobacter-calcoaceticus-ca16-a-bacterium-capable-of-degrading-diesel-and-lignin
#3
Margaret T Ho, Brian Weselowski, Ze-Chun Yuan
No abstract text is available yet for this article.
August 3, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28723202/structure-guided-design-of-protein-biosensors-for-phenolic-pollutants
#4
Shamayeeta Ray, Santosh Panjikar, Ruchi Anand
Phenolic aromatic compounds are a major source of environmental pollution. Currently there are no in situ methods for specifically and selectively detecting these pollutants. Here, we exploit the nature's biosensory machinery by employing Acinetobacter calcoaceticus NCIB8250 protein, MopR, as a model system to develop biosensors for selective detection of a spectrum of these pollutants. The X-ray structure of the sensor domain of MopR was used as a scaffold for logic-based tunable biosensor design. By employing a combination of in silico structure guided approaches, mutagenesis and isothermal calorimetric studies, we were able to generate biosensor templates, that can selectively and specifically sense harmful compounds like chlorophenols, cresols, catechol, and xylenols...
March 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28692823/high-hiv-infection-prevalence-in-a-group-of-men-who-have-sex-with-men
#5
Raquel Maria Cardoso Torres, Marly Marques da Cruz, André Reynaldo Santos Périssé, Denise Ribeiro Franqueira Pires
Brazil is characterized by a concentrated AIDS epidemic, it has a prevalence of less than 1% in the general population. However, there are higher rates in specific populations, especially in men who have sex with men. The study's aim was to analyze the association between sociodemographic characteristics, sexual practices, sexual behaviors and the HIV infection in a group of men who have sex with men. Secondary data was collected between June 2014 and September 2015 in a research of cross-sectional design in the city of Rio de Janeiro, Brazil...
July 8, 2017: Brazilian Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28683724/first-report-of-cavitary-pneumonia-due-to-community-acquired-acinetobacter-pittii-study-of-virulence-and-overview-of-pathogenesis-and-treatment
#6
Romaric Larcher, Alix Pantel, Erik Arnaud, Albert Sotto, Jean-Philippe Lavigne
BACKGROUND: Acinetobacter pittii is a nosocomial pathogen rarely involved in community-acquired infections. We report for the first time that A. pittii can be responsible for cavitary community-acquired pneumonia and study its virulence, and discuss its pathogenesis and treatment options. CASE PRESENTATION: A 45-year-old woman with a history of smoking and systemic lupus was admitted to Nimes University Hospital (France) with coughing and sputum lasting for three weeks...
July 6, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28619790/complete-genome-sequence-of-acinetobacter-calcoaceticus-ca16-a-bacterium-capable-of-degrading-diesel-and-lignin
#7
Margaret T Ho, Brian Weselowski, Ze-Chun Yuan
We report here the complete assembled genome sequence of Acinetobacter calcoaceticus CA16, which is capable of utilizing diesel and lignin as a sole carbon source. CA16 contains a 4,110,074-bp chromosome and a 5,920-bp plasmid. The assembled sequences will help elucidate potential metabolic pathways and mechanisms responsible for CA16's hydrocarbon degradation ability.
June 15, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28598213/characterization-and-degradation-potential-of-diesel-degrading-bacterial-strains-for-application-in-bioremediation
#8
María Balseiro-Romero, Panagiotis Gkorezis, Petra S Kidd, Jonathan Van Hamme, Nele Weyens, Carmen Monterroso, Jaco Vangronsveld
Bioremediation of polluted soils is a promising technique with low environmental impact, which uses soil organisms to degrade soil contaminants. In this study, 19 bacterial strains isolated from a diesel-contaminated soil were screened for diesel-degrading potential, biosurfactant production, and biofilm formation abilities, all desirable characteristics when selecting strains for re-inoculation into hydrocarbon-contaminated soils. Diesel degradation rates were determined in vitro in minimal medium with diesel as the sole carbon source...
June 9, 2017: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/28594944/development-and-evaluation-of-a-core-genome-multilocus-typing-scheme-for-whole-genome-sequence-based-typing-of-acinetobacter-baumannii
#9
Paul G Higgins, Karola Prior, Dag Harmsen, Harald Seifert
We have employed whole genome sequencing to define and evaluate a core genome multilocus sequence typing (cgMLST) scheme for Acinetobacter baumannii. To define a core genome we downloaded a total of 1,573 putative A. baumannii genomes from NCBI as well as representative isolates belonging to the eight previously described international A. baumannii clonal lineages. The core genome was then employed against a total of fifty-three carbapenem-resistant A. baumannii isolates that were previously typed by PFGE and linked to hospital outbreaks in eight German cities...
2017: PloS One
https://www.readbyqxmd.com/read/28578555/infections-due-to-acinetobacter-baumannii-in-the-icu-treatment-options
#10
Joseph P Lynch, George G Zhanel, Nina M Clark
Bacteria within the genus Acinetobacter (principally A. baumannii-calcoaceticus complex [ABC]) are gram-negative coccobacilli that may cause nosocomial infections in critically ill or debilitated patients (particularly ventilator-associated pneumonia and infections of the bloodstream, urinary tract, and wounds). Treatment of Acinetobacter infections is difficult, as Acinetobacter spp. are intrinsically resistant to multiple antimicrobial agents, and have a remarkable ability to acquire new resistance determinants via mechanisms that include plasmids, transposons, integrons, and resistance islands...
June 2017: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/28562751/carbapenem-resistant-acinetobacter-baumannii-contamination-in-an-intensive-care-unit
#11
COMPARATIVE STUDY
Otávio Hallal Ferreira Raro, Stephanie Wagner Gallo, Carlos Alexandre Sanchez Ferreira, Sílvia Dias de Oliveira
INTRODUCTION: Acinetobacter baumannii is a major pathogen causing infections in intensive care units (ICUs). In this study, we aimed to evaluate the presence of A. baumannii in an ICU environment and gloves from ICU workers and to characterize the antimicrobial resistance of the isolates in comparison with those isolated from ICU patients at the same hospital. METHODS: ICU samples were collected from March to November 2010. Isolates biochemically characterized as Acinetobacter calcoaceticus-Acinetobacter baumannii complex were evaluated by PCR targeting the 16S rDNA and bla OXA-51 genes...
March 2017: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/28533186/delayed-identification-of-acinetobacter-baumannii-during-an-outbreak-owing-to-disrupted-blaoxa-51-like-by-isaba19
#12
Amjad Ahmadi, Himen Salimizand
Early detection of Acinetobacter baumannii, an emerging pathogen in hospital settings, is of interest. The blaOXA-51-like family had been used as a marker to detect A. baumannii. During an infection outbreak, 14 isolates produced a 1.7-kb PCR band instead of 353 bp for this marker. This work sought the reasons behind the increased marker size. Characterisation of isolates was done by API-20NE, gyrB multiplex PCR and 16S-23S rRNA ITS sequencing. The 1.7-kb band generated and the complete blaOXA-51-like variant were sequenced to find the probable integrated element...
May 19, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28435019/epidemiology-and-trends-in-the-antibiotic-susceptibilities-of-gram-negative-bacilli-isolated-from-patients-with-intra-abdominal-infections-in-the-asia-pacific-region-2010-2013
#13
Ya-Ting Chang, Geoffrey Coombs, Thomas Ling, V Balaji, Camilla Rodrigues, Hiroshige Mikamo, Min-Ja Kim, Datin Ganeswrie Rajasekaram, Myrna Mendoza, Thean Yen Tan, Pattarachai Kiratisin, Yuxing Ni, Weinman Barry, Yingchun Xu, Yen-Hsu Chen, Po-Ren Hsueh
This study was conducted to investigate the epidemiology and antimicrobial susceptibility patterns of Gram-negative bacilli (GNB) isolated from intra-abdominal infections (IAIs) in the Asia-Pacific region (APR) from 2010-2013. A total of 17 350 isolates were collected from 54 centres in 13 countries in the APR. The three most commonly isolated GNB were Escherichia coli (46.1%), Klebsiella pneumoniae (19.3%) and Pseudomonas aeruginosa (9.8%). Overall, the rates of extended-spectrum β-lactamase (ESBL)-producing E...
June 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28336599/complete-genome-sequence-and-methylome-analysis-of-acinetobacter-calcoaceticus-65
#14
Alexey Fomenkov, Tamas Vincze, Sergey K Degtyarev, Richard J Roberts
Acinetobacter calcoaceticus 65 is the original source strain for the restriction enzyme Acc65I. Its complete sequence and full methylome were determined using single-molecule real-time (SMRT) sequencing.
March 23, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28213015/lettuce-and-fruits-as-a-source-of-multidrug-resistant-acinetobacter-spp
#15
Ana Carvalheira, Joana Silva, Paula Teixeira
The role of ready-to-eat products as a reservoir of pathogenic species of Acinetobacter remains unclear. The objective of the present study was to evaluate the presence of Acinetobacter species in lettuces and fruits marketed in Portugal, and their susceptibility to antimicrobials. Acinetobacter spp. were isolated from 77.9% of the samples and these microorganisms were also found as endophytes (i.e. present within the plant tissue) in 12 of 20 samples of lettuces analysed. Among 253 isolates that were identified as belonging to this genus, 181 presented different PFGE profiles, representing different strains...
June 2017: Food Microbiology
https://www.readbyqxmd.com/read/28111984/effects-of-meropenem-exposure-in-persister-cells-of-acinetobacter-calcoaceticus-baumannii
#16
Stephanie Wagner Gallo, Bruna Kern Donamore, Vany Elisa Pagnussatti, Carlos Alexandre Sanchez Ferreira, Sílvia Dias de Oliveira
AIM: To evaluate the influence of meropenem in the Acinetobacter calcoaceticus-baumannii (ACB) persister levels. METHODS: Persister levels in planktonic and biofilm cultures from ACB isolates were evaluated after exposure to different meropenem concentrations. RESULTS: A high variability of persister fractions was observed among the isolates cultured under planktonic and biofilm conditions. Meropenem concentration did not influence persister fractions, even when far above the MIC...
February 2017: Future Microbiology
https://www.readbyqxmd.com/read/28109554/clinical-and-microbiological-characteristics-of-bloodstream-infections-among-patients-with-haematological-malignancies-with-and-without-neutropenia-at-a-medical-centre-in-northern-taiwan-2008-2013
#17
Chien-Yuan Chen, Feng-Ming Tien, Wang-Huei Sheng, Shang-Yi Huang, Ming Yao, Jih-Luh Tang, Woei Tsay, Hwei-Fang Tien, Po-Ren Hsueh
This study aimed to investigate the epidemiology and microbiology of bloodstream infections (BSIs) in patients with haematological malignancies. Clinical characteristics and microbiology of 2083 patients with haematological malignancy who were treated for BSI from 2008 to 2013 at a medical centre in Taiwan were retrospectively reviewed. Lymphoma (38.1%) was the most common, followed by acute myeloid leukaemia (30.9%). Of the 2090 non-duplicate BSI isolates, 1310 (62.7%) were recovered from patients with neutropenia...
March 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/27935281/engineering-cyclohexanone-monooxygenase-for-the-production-of-methyl-propanoate
#18
Hugo L van Beek, Elvira Romero, Marco W Fraaije
A previous study showed that cyclohexanone monooxygenase from Acinetobacter calcoaceticus (AcCHMO) catalyzes the Baeyer-Villiger oxidation of 2-butanone, yielding ethyl acetate and methyl propanoate as products. Methyl propanoate is of industrial interest as a precursor of acrylic plastic. Here, various residues near the substrate and NADP(+) binding sites in AcCHMO were subjected to saturation mutagenesis to enhance both the activity on 2-butanone and the regioselectivity toward methyl propanoate. The resulting libraries were screened using whole cell biotransformations, and headspace gas chromatography-mass spectrometry was used to identify improved AcCHMO variants...
December 20, 2016: ACS Chemical Biology
https://www.readbyqxmd.com/read/27795305/carbapenem-resistant-acinetobacter-baumannii-and-enterobacteriaceae-in-south-and-southeast-asia
#19
REVIEW
Li-Yang Hsu, Anucha Apisarnthanarak, Erum Khan, Nuntra Suwantarat, Abdul Ghafur, Paul Anantharajah Tambyah
Carbapenem-resistant Gram-negative bacteria, in particular the Acinetobacter baumannii-calcoaceticus complex and Enterobacteriaceae, are escalating global public health threats. We review the epidemiology and prevalence of these carbapenem-resistant Gram-negative bacteria among countries in South and Southeast Asia, where the rates of resistance are some of the highest in the world. These countries house more than a third of the world's population, and several are also major medical tourism destinations. There are significant data gaps, and the almost universal lack of comprehensive surveillance programs that include molecular epidemiologic testing has made it difficult to understand the origins and extent of the problem in depth...
January 2017: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/27742144/evaluation-of-an-ultraviolet-c-light-emitting-device-for-disinfection-of-electronic-devices
#20
Lisa M Li, Titus Wong, Emily Rose, Graham Wickham, Elizabeth Bryce
BACKGROUND: A tabletop-type ultraviolet C (UVC) light-emitting disinfecting device was evaluated for microbiologic effectiveness, safety, usability, and end-user satisfaction. METHODS: Three different inoculums of methicillin-resistant Staphylococcus aureus, Pseudomonas aeruginosa, and Acinetobacter calcoaceticus-baumannii complex strains suspended in both saline and trypticase soy broth were applied onto stainless steel carriers and electronic device surfaces in triplicate and cultured for growth after UVC disinfection...
December 1, 2016: American Journal of Infection Control
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