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Acinetobacter calcoaceticus

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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
#1
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...
April 20, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28336599/complete-genome-sequence-and-methylome-analysis-of-acinetobacter-calcoaceticus-65
#2
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
#3
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
#4
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...
January 23, 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
#5
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
#6
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
#7
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
#8
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
https://www.readbyqxmd.com/read/27714593/emergence-of-new-delhi-metallo-beta-lactamase-1-and-other-carbapenemase-producing-acinetobacter-calcoaceticus-baumannii-complex-among-patients-in-hospitals-in-ha-noi-viet-nam
#9
D N Tran, H H Tran, M Matsui, M Suzuki, S Suzuki, K Shibayama, T D Pham, T T Van Phuong, D A Dang, H S Trinh, C T Loan, L T V Nga, H R van Doorn, H F L Wertheim
Acinetobacter baumannii is an important cause of multidrug-resistant hospital acquired infections in the world. Here, we investigate the presence of NDM-1 and other carbapenemases among carbapenem-resistant A. baumannii isolated between August 2010 and December 2014 from three large hospitals in Hanoi, Vietnam. We identified 23/582 isolates (4 %) (11 from hospital A, five from hospital B, and seven from hospital C) that were NDM-1 positive, and among them 18 carried additional carbapenemase genes, including seven isolates carrying NDM-1, IMP-1, and OXA-58 with high MICs for carbapenems...
February 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/27709647/multi-drug-resistant-acinetobacter-calcoaceticus-acinetobacter-baumannii-complex-infection-outbreak-in-dogs-and-cats-in-a-veterinary-hospital
#10
S Kuzi, S E Blum, N Kahane, A Adler, O Hussein, G Segev, I Aroch
BACKGROUND: Members of the Acinetobacter calcoaceticus-Acinetobacter baumannii complex cause severe outbreaks in humans, and are increasingly reported in animals. OBJECTIVE AND METHODS: A retrospective study, describing a severe outbreak in dogs and cats caused by a multidrug resistant member of the Acinetobacter calcoaceticus-Acinetobacter baumannii complex in a veterinary hospital, between July 2010 and November 2012. RESULTS: The study included 19 dogs and 4 cats...
November 2016: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/27611681/opportunistic-infections-in-hiv-infected-patients-differ-strongly-in-frequencies-and-spectra-between-patients-with-low-cd4-cell-counts-examined-postmortem-and-compensated-patients-examined-antemortem-irrespective-of-the-haart-era
#11
Marta K Powell, Kamila Benková, Pavel Selinger, Marek Dogoši, Iva Kinkorová Luňáčková, Hana Koutníková, Jarmila Laštíková, Alena Roubíčková, Zuzana Špůrková, Lucie Laclová, Václav Eis, Josef Šach, Petr Heneberg
OBJECTIVE: AIDS-related mortality has changed dramatically with the onset of highly active antiretroviral therapy (HAART), which has even allowed compensated HIV-infected patients to withdraw from secondary therapy directed against opportunistic pathogens. However, in recently autopsied HIV-infected patients, we observed that associations with a broad spectrum of pathogens remain, although detailed analyses are lacking. Therefore, we focused on the possible frequency and spectrum shifts in pathogens associated with autopsied HIV-infected patients...
2016: PloS One
https://www.readbyqxmd.com/read/27605498/pcr-assay-based-on-the-gyrb-gene-for-rapid-identification-of-acinetobacter-baumannii-calcoaceticus-complex-at-specie-level
#12
Aline B Teixeira, Juliana Barin, Djuli M Hermes, Afonso L Barth, Andreza F Martins
BACKGROUND: The genus Acinetobacter sp. comprises more than 50 species, and four are closely related and difficult to be distinguished by either phenotypic or genotypic methods: the Acinetobacter calcoaceticus-baumannii complex (ABC). The correct identification at species level is necessary mainly due to the epidemiological aspects. METHODS: We evaluated a multiplex PCR for gyrB gene to identify the species of the ABC using the sequencing of the ITS 16S-23S fragment as a gold standard...
September 8, 2016: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/27598629/the-role-of-the-genetic-elements-bla-oxa-and-is-aba-1-in-the-acinetobacter-calcoaceticus-acinetobacter-baumannii-complex-in-carbapenem-resistance-in-the-hospital-setting
#13
Vanessa Cristine Kobs, Jéssica Augustini Ferreira, Thaís Alexandra Bobrowicz, Leslie Ecker Ferreira, Roseneide Campos Deglmann, Glauco Adrieno Westphal, Paulo Henrique Condeixa de França
INTRODUCTION: Members of the Acinetobacter genus are key pathogens that cause healthcare-associated infections, and they tend to spread and develop new antibiotic resistance mechanisms. Oxacillinases are primarily responsible for resistance to carbapenem antibiotics. Higher rates of carbapenem hydrolysis might be ascribed to insertion sequences, such as the ISAba1 sequence, near bla OXA genes. The present study examined the occurrence of the genetic elements bla OXA and ISAba1 and their relationship with susceptibility to carbapenems in clinical isolates of the Acinetobacter calcoaceticus-Acinetobacter baumannii complex...
July 2016: Revista da Sociedade Brasileira de Medicina Tropical
https://www.readbyqxmd.com/read/27552304/emergence-of-antimicrobial-resistance-among-acinetobacter-species-a-global-threat
#14
Nina M Clark, George G Zhanel, Joseph P Lynch
PURPOSE OF REVIEW: Bacteria within the genus Acinetobacter [principally Acinetobacter baumannii-calcoaceticus complex (ABC)] are Gram-negative coccobacilli that may cause serious nosocomial infections (particularly ventilator-associated pneumonia and infections of the bloodstream, urinary tract, and wounds) as well as community-acquired infections (often skin/soft tissue infections in the context of trauma). Within the past two decades, Acinetobacter spp. have been responsible for an increasing number of infections in intensive care units (ICUs) globally...
October 2016: Current Opinion in Critical Care
https://www.readbyqxmd.com/read/27551277/carbapenem-resistance-in-acinetobacter-baumannii-and-other-acinetobacter-spp-causing-neonatal-sepsis-focus-on-ndm-1-and-its-linkage-to-isaba125
#15
Somdatta Chatterjee, Saswati Datta, Subhasree Roy, Lavanya Ramanan, Anindya Saha, Rajlakshmi Viswanathan, Tapas Som, Sulagna Basu
Carbapenem-resistant determinants and their surrounding genetic structure were studied in Acinetobacter spp. from neonatal sepsis cases collected over 7 years at a tertiary care hospital. Acinetobacter spp. (n = 68) were identified by ARDRA followed by susceptibility tests. Oxacillinases, metallo-β-lactamases (MBLs), extended-spectrum β-lactamases and AmpCs, were detected phenotypically and/or by PCR followed by DNA sequencing. Transconjugants possessing the bla NDM-1(New Delhi metallo-β-lactamase) underwent further analysis for plasmids, integrons and associated genes...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27496018/tigecycline-based-versus-sulbactam-based-treatment-for-pneumonia-involving-multidrug-resistant-acinetobacter-calcoaceticus-acinetobacter-baumannii-complex
#16
Jung-Jr Ye, Huang-Shen Lin, Chun-Fu Yeh, Yen-Mu Wu, Po-Yen Huang, Chien-Chang Yang, Ching-Tai Huang, Ming-Hsun Lee
BACKGROUND: The treatment options for pneumonia involving multidrug-resistant Acinetobacter calcoaceticus-Acinetobacter baumannii (MDR Acb) complex are limited, and the optimal treatment has not been established. METHODS: To compare the efficacy of tigecycline-based with sulbactam (or ampicillin/sulbactam)-based therapy for pneumonia involving MDR Acb complex, we conducted a retrospective study comparing 84 tigecycline-treated adult patients during the period August 2007 to March 2010 with 84 sulbactam or ampicillin/sulbactam-treated adult patients during the period September 2004 to July 2007...
2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27461479/determination-of-synergy-between-sulbactam-meropenem-and-colistin-in-carbapenem-resistant-klebsiella-pneumoniae-and-acinetobacter-baumannii-isolates-and-correlation-with-the-molecular-mechanism-of-resistance
#17
Shakti Laishram, Shalini Anandan, Bakthavatchalam Yamuna Devi, Munusamy Elakkiya, Babu Priyanka, Thukkaram Bhuvaneshwari, John Victor Peter, Kandasmy Subramani, Veeraraghavan Balaji
Treatment of infections with carbapenem-resistant Gram negative organism is a major challenge especially among intensive care patients. Combinations of sulbactam, meropenem and colistin was studied for its synergistic activity against 100 invasive isolates of carbapenem-resistant Klebsiella pneumoniae and Acinetobacter baumannii-calcoaceticus complex by checkerboard assay and time kill assay (TKA). In addition, presence of carbapenemase production was determined by multiplex PCR. Time kill assay detected more synergy than checkerboard assay...
August 2016: Journal of Chemotherapy
https://www.readbyqxmd.com/read/27449800/characteristics-of-invasive-acinetobacter-species-isolates-recovered-in-a-pediatric-academic-center
#18
Avish L Jain, Christian M Harding, Kaivon Assani, Chandra L Shrestha, Mercedees Haga, Amy Leber, Robert S Munson, Benjamin T Kopp
BACKGROUND: Acinetobacter species are associated with increasing mortality due to emerging drug-resistance. Pediatric Acinetobacter infections are largely undefined in developed countries and clinical laboratory identification methods do not reliably differentiate between members of the Acinetobacter calcoaceticus-baumannii complex, leading to improper identification. Therefore we aimed to determine risk factors for invasive Acinetobacter infections within an academic, pediatric setting as well as defining microbiologic characteristics of predominant strains...
2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27432448/acinetobacter-dijkshoorniae-sp-nov-a-member-of-the-acinetobacter-calcoaceticus-acinetobacter-baumannii-complex-mainly-recovered-from-clinical-samples-in-different-countries
#19
Clara Cosgaya, Marta Marí-Almirall, Ado Van Assche, Dietmar Fernández-Orth, Noraida Mosqueda, Murat Telli, Geert Huys, Paul G Higgins, Harald Seifert, Bart Lievens, Ignasi Roca, Jordi Vila
The recent advances in bacterial species identification methods have led to the rapid taxonomic diversification of the genus Acinetobacter. In the present study, phenotypic and molecular methods have been used to determine the taxonomic position of a group of 12 genotypically distinct strains belonging to the Acinetobacter calcoaceticus-Acinetobacter baumannii (ACB) complex, initially described by Gerner-Smidt and Tjernberg in 1993, that are closely related to Acinetobacter pittii. Strains characterized in this study originated mostly from human samples obtained in different countries over a period of 15 years...
October 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27412356/rapid-species-identification-and-epidemiological-analysis-of-carbapenem-resistant-acinetobacter-spp-by-a-pcr-based-open-reading-frame-typing-method
#20
Yuki Yamada, Kentaro Endo, Kaori Sawase, Marie Anetai, Kazuya Narita, Yuji Hatakeyama, Katsunori Ishifuji, Makiko Kurota, Akira Suwabe
The spread of carbapenem-resistant Acinetobacter spp. has become a global problem. In this study, 18 carbapenem-resistant Acinetobacter calcoaceticus-baumannii (ACB) complexes, identified using a conventional biochemical method at our hospital during 2004-2013, were studied for species identification and epidemiological analyses. Species identification was performed using matrix-assisted laser desorption ionization-time-of-flight MS, a partial sequence analysis of rpoB and a PCR-based ORF typing (POT) method...
September 2016: Journal of Medical Microbiology
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