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https://www.readbyqxmd.com/read/29340588/antimicrobial-resistant-klebsiella-pneumoniae-carriage-and-infection-in-specialized-geriatric-care-wards-linked-to-acquisition-in-the-referring-hospital
#1
Claire L Gorrie, Mirjana Mirceta, Ryan R Wick, Louise M Judd, Kelly L Wyres, Nicholas R Thomson, Richard A Strugnell, Nigel F Pratt, Jill S Garlick, Kerrie M Watson, Peter C Hunter, Steve A McGloughlin, Denis W Spelman, Adam W J Jenney, Kathryn E Holt
Background: Klebsiella pneumoniae is a leading cause of extended-spectrum beta-lactamase (ESBL) producing hospital-associated infections, for which elderly patients are at increased risk. Methods: We conducted a 1-year prospective cohort study, in which a third of patients admitted to two geriatric wards in a specialized hospital were recruited and screened for carriage of K. pneumoniae by microbiological culture. Clinical isolates were monitored via the hospital laboratory...
January 11, 2018: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29340060/assessment-of-antimicrobial-and-wound-healing-effects-of-brevinin-2ta-against-the-bacterium-klebsiella-pneumoniae-in-dermally-wounded-rats
#2
Siqin Liu, Qilin Long, Yang Xu, Jun Wang, Zhongwei Xu, Lei Wang, Mei Zhou, Yuxin Wu, Tianbao Chen, Chris Shaw
Antimicrobial peptides (AMPs) are regarded as promising alternatives for antibiotics due to their inherent capacity to prevent microbial drug resistance. Amphibians are rich source of bioactive molecules, which provide numerous AMPs with various structures as drug candidates. Here, we isolated and identified a novel AMP Brevinin-2Ta (B-2Ta) from the skin secretion of the European frog, Pelophylax kl. esculentus. In vitro studies revealed that it showed broad antimicrobial activities against S. aureus, E. coli and C...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29338931/in-vitro-activity-of-eravacycline-against-2213-gram-negative-and-2424-gram-positive-bacterial-pathogens-isolated-in-canadian-hospital-laboratories-canward-surveillance-study-2014-2015
#3
George G Zhanel, Melanie R Baxter, Heather J Adam, Joyce Sutcliffe, James A Karlowsky
Gram-negative (n=2213) and Gram-positive (n=2424) pathogens isolated from patients in 13 Canadian hospitals in 2014 and 2015 were tested for in vitro susceptibility to eravacycline and comparators using the Clinical and Laboratory Standards Institute broth microdilution method. The concentration of eravacycline inhibiting 90% of isolates (MIC90) ranged from 0.5 to 2μg/mL for 9 species of Enterobacteriaceae tested (n=2067). Eravacycline activity was largely unaffected by extended-spectrum β-lactamase phenotypes in Escherichia coli (n=141) and Klebsiella pneumoniae (n=21)...
December 22, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/29338592/whole-genome-sequencing-characterization-of-bloodstream-infection-causing-hypervirulent-klebsiella-pneumoniae-of-capsular-serotype-k2-and-st374
#4
Xiaoli Wang, Yingzhou Xie, Gang Li, Jialin Liu, Xiaobin Li, Lijun Tian, Jingyong Sun, Hong-Yu Ou, Hongping Qu
Hypervirulent K. pneumoniae variants (hvKP) have been increasingly reported worldwide, causing metastasis of severe infections such as liver abscesses and bacteremia. The capsular serotype K2 hvKP strains show diverse multi-locus sequence types (MLSTs), but with limited genetics and virulence information. In this study, we report a hypermucoviscous K. pneumoniae strain, RJF293, isolated from a human bloodstream sample in a Chinese hospital. It caused a metastatic infection and fatal septic shock in a critical patient...
January 17, 2018: Virulence
https://www.readbyqxmd.com/read/29338030/incidence-microbiology-and-outcomes-of-endophthalmitis-after-111-876-pars-plana-vitrectomies-at-a-single-tertiary-eye-care-hospital
#5
Muna Bhende, Rajiv Raman, Mukesh Jain, Pratik K Shah, Tarun Sharma, Lingam Gopal, Pramod S Bhende, Sangeetha Srinivasan, Malathi Jambulingam
PURPOSE: To describe the incidence, risk factors, clinical presentation, causative organisms, and outcomes in patients with endophthalmitis following pars plana vitrectomy (20G and minimally invasive vitrectomy surgery (MIVS). METHODS: Of 111,876 vitrectomies (70,585 20-G 41,291 MIVS) performed, 45 cases developed acute-onset, postoperative endophthalmitis. RESULTS: The rate of culture positive and culture negative endophthalmitis was 0.021% (2...
2018: PloS One
https://www.readbyqxmd.com/read/29336243/identification-of-in-vitro-red-fluorescent-protein-with-antipathogenic-activity-from-the-midgut-of-the-silkworm-bombyx-mori-l
#6
Manjunatha Ks Gowda, Anitha Peter, Mahantesha Bn Naika, P Niranjana, P Shamprasad
Biotic stress affects all organisms, including the silkworm (Bombyx mori L.) which also has a plethora of defense mechanisms against the infecting pathogens. The midgut plays an important role as a natural barrier and source of innate immunity. The present investigation was thus undertaken to identify an antiviral red fluorescent protein formed in the midgut of the silkworm Bombyx mori L. The digestive juice from fifth instar Kolar Gold silkworm larvae was collected and subjected to 40 % ammonium sulfate precipitation and purified by gel filtration chromatography (GFC)...
January 15, 2018: Protein and Peptide Letters
https://www.readbyqxmd.com/read/29336224/treatment-of-a-klebsiella-pneumoniae-kpc-cellulitis-and-gut-decolonization-with-ceftazidime-avibactam-in-a-migrant-from-libya
#7
Novella Carannante, Carlo Pallotto, Mariano Bernardo, Giovanni Di Caprio, Carlo Tascini
KPC-producing Klebsiella pneumoniae (KPC-Kp) is nowadays a global concern. Ceftazidime/avibactam is the most promising novel antibiotic combination available at the moment. We describe the case of a migrant with no risk factors for an infection due to multidrug resistant bacteria. He suffered from a KPC-Kp cellulitis and was treated with a ceftazidime/avibactam-meropenem-fosfomycin combination that not only eradicated the infection but also decontaminated his gut. Ceftazidime/avibactam-based treatment can be useful also in decontamination procedures...
January 16, 2018: Journal of Chemotherapy
https://www.readbyqxmd.com/read/29335877/development-of-cyclic-amp-receptor-protein-based-artificial-transcription-factor-for-intensifying-gene-expression
#8
Peng Zhao, Wenjuan Wang, Pingfang Tian
Vector-dependent gene overexpression typically relies on an efficient operon and sufficient RNA polymerases (RNAPs). The lac (lactose) operon is a paradigm of transcription control, and cyclic AMP receptor protein (CRP) is a global regulator capable of recruiting RNAPs. However, the gap between lac operon and CRP has not been well bridged. In this work, CRP was fused to lac repressor protein (lacI) to form an artificial transcription factor (ATF) with the expectation that when LacI acted on the lacO-positioned upstream of gene of interest, the LacI-tethered CRP would trap RNAPs and thus improve the expression of PuuC, an aldehyde dehydrogenase catalyzing 3-hydroxypropionaldehyde (3-HPA) to 3-hydroxypropionic acid (3-HP) in Klebsiella pneumoniae...
January 16, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29334903/a-rare-case-of-pericarditis-and-pleural-empyema-secondary-to-transdiaphragmatic-extension-of-pyogenic-liver-abscess
#9
Eunae Cho, Sang Woo Park, Chung Hwan Jun, Sang Soo Shin, Eun Kyu Park, Kyo Seon Lee, Seon Young Park, Chang Hwan Park, Hyun Soo Kim, Sung Kyu Choi, Jong Sun Rew
BACKGROUND: Transdiaphragmatic extension of pyogenic liver abscess is the rarest cause of pericarditis and pleural empyema. It is a rapidly progressive and highly lethal infection with mortality rates reaching 100% if left untreated. However, the transmission route, treatment methods and prognosis have not been well studied. CASE PRESENTATION: A 65-year-old male patient presented with a fever, dyspnea, and right upper quadrant abdominal pain. Computed tomography of the chest and abdomen showed huge liver abscess without full liquefaction in the left lobe, large amount of left pleural effusion, and mild pericardial effusion, and the patient was treated with parenteral antibiotics and pigtail insertion at the left pleura...
January 15, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29334239/antimicrobial-and-antiquorum-sensing-activity-of-ricinus-communis-extracts-and-ricinine-derivatives
#10
Mai H El-Naggar, Abdelaziz Elgaml, Fatma M Abdel Bar, Farid A Badria
Ricinine (1), a known major alkaloid in Ricinus communis plant, was used as a starting compound for the synthesis of six ricinine derivatives; two new and four known compounds. The new derivatives; 3-amino-5-methyl-1H-pyrazolo[4,3-c]pyridin-4(5H)-one (2), and 3-amino-5-methyl-1-(phenylsulfonyl)-1H-pyrazolo[4,3-c]pyridin-4(5H)-one (3), as well as the previously prepared derivatives (4-7) were subjected for antimicrobial and antiquorum-sensing evaluation in comparison to different R. communis extracts. Acetyl ricininic acid derivative (5) showed the highest antimicrobial activity among all tested derivatives against Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeuroginosa and Candida albicans...
January 15, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29333051/therapeutic-significance-of-loligo-vulgaris-lamarck-1798-ink-extract-a-biomedical-approach
#11
Sri Kumaran Nadarajah, Radha Vijayaraj, Jayaprakashvel Mani
Background: The squid ink extract is well known for its biomedical properties. Objective: In this study, squid Loligo vulgaris was collected from Tuticorin costal water, Bay of Bengal, India. Materials and Methods: Proximate composition of the crude squid ink was studied and found to have protein as the major component over lipid and carbohydrates. Further, bioactive fractions of squid ink were extracted with ethanol, and therapeutic applications such as hemolytic, antioxidant, antimicrobial, and in vitro anti-inflammatory properties were analyzed using standard methods...
December 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/29332105/the-emergence-of-carbapenem-resistant-klebsiella-pneumoniae-isolates-producing-oxa-48-and-ndm-in-the-southern-asir-province-saudi-arabia
#12
Ibrahim A Al-Zahrani, Bander A Alsiri
To identify the prevalence of carbapenem-resistant Klebsiella pneumoniae (CRKP) and the most common types of cabapenemases among CRKP in the Southern (Asir) province hospitals, Saudi Arabia. Methods: The cross-sectional study was conducted between late April and September in 2015. A total of 54 Klebsiella pneumoniae (K. pneumoniae) isolates with reduced sensitivity to carbapenems were obtained from various clinical specimens of the 2 largest hospitals in the Southern province. Minimum inhibitory concentrations (MICs) of carbapenems were confirmed using E-test...
January 2018: Saudi Medical Journal
https://www.readbyqxmd.com/read/29331370/preparation-and-evaluation-of-antibacterial-potential-of-pithecellobium-dulce-root-extract-against-gram-positive-and-gram-negative-bacteria
#13
Muneer Ahmad Bhat, Rayees Ahmad Malik, Poonam Prakash, Ali Mohd Lone
In the present study hexane, benzene, ethyl acetate and ethanol extracts of Pithecellobium dulce root were prepared using soxhlet extractor. The extracts were evaluated for antibacterial activity against one Gram positive (Staphylococcus aureus) and three Gram negative (Acetobacter aceti, Acetobacter aceti, Klebsiella pneumoniae) strains. Disc diffusion method revealed promising antibacterial activity of the extracts prepared in polar solvents (ethyl acetate and ethanol) compared to non-polar solvents (hexane and benzene)...
January 10, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29330994/pattern-of-causative-micro-organisms-in-catheter-related-blood-stream-infections-in-dialysis-patients-experience-from-saudi-arabia
#14
Bilal Mohsin
BACKGROUND: Catheter related blood stream infections (CRBSI) are the leading cause of morbidity in HD patients. The majority of these infections relate to haemodialysis catheters. There is a paucity of local data on microbial agents responsible for CRBSI in our region. This prompted our study. METHODS: This Prospective observatory survey was conducted in Department of Nephrology, King Fahd Hospital, Hofuf KSA from Nov 2014 to Jan 2017 (26 months). It was performed on dialysis patients with HD catheters who developed features of CRBSI...
October 2017: Journal of Ayub Medical College, Abbottabad: JAMC
https://www.readbyqxmd.com/read/29330592/genomic-characterization-of-key-bacteriophages-to-formulate-the-potential-biocontrol-agent-to-combat-enteric-pathogenic-bacteria
#15
Krupa M Parmar, Nishant A Dafale, Hitesh Tikariha, Hemant J Purohit
Combating bacterial pathogens has become a global concern especially when the antibiotics and chemical agents are failing to control the spread due to its resistance. Bacteriophages act as a safe biocontrol agent by selectively lysing the bacterial pathogens without affecting the natural beneficial microflora. The present study describes the screening of prominent enteric pathogens NDK1, NDK2, NDK3, and NDK4 (Escherichia, Klebsiella, Enterobacter, and Serratia) mostly observed in domestic wastewater; against which KNP1, KNP2, KNP3, and KNP4 phages were isolated...
January 12, 2018: Archives of Microbiology
https://www.readbyqxmd.com/read/29329652/three-new-anthraquinone-derivatives-isolated-from-symplocos-racemosa-and-their-antibiofilm-activity
#16
Umar Farooq, Sara Khan, Sadia Naz, Ajmal Khan, Afsar Khan, Ayaz Ahmed, Abdur Rauf, Syed Majid Bukhari, Shujaat Ali Khan, Arfa Kamil, Nadia Riaz, Abdur Rahman Khan
Three new alkyl substituted anthraquinone derivatives, trivially named as symploquinones A-C (Compounds 1-3) were isolated from Symplocos racemosa. The structures of these compounds were determined on the basis of extensive spectroscopic analyses (UV, IR, Mass, 1H- and 13C-NMR, and two-dimensional (2D) NMR techniques). The resulting data were also compared with the reported literature. These compounds were then subjected to antibacterial or antibiofilm testing. Compounds 1 and 3 exhibited good antibacterial activity in the concentration range of 160-83 μg·mL-1 against Streptococcus mutans, methicillin resistant Staphylococcus aureus and Proteus mirabilis...
December 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/29327210/paired-blood-cultures-increase-the-sensitivity-for-detecting-pathogens-in-both-inpatients-and-outpatients
#17
Bansidhar Tarai, Dinesh Jain, Poonam Das, Sandeeep Budhiraja
The objective of this study was to show the differences between paired blood cultures (PBC) versus single blood cultures (SBC) in the microbiologic yield, the sensitivity to detect pathogens and the time to positivity (TTP). We performed a retrospective study examining 112,570 blood culture samples over a 5-year period from July 2011 to May 2016 in the BacT/ALERT® 3D automated blood culture system (bioMérieux, Marcy l'Etoile, France). Bacteria and yeasts were identified using the VITEK® 2 Compact system (bioMérieux, Marcy l'Etoile, France)...
January 11, 2018: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29326011/neonatal-intestinal-colonization-with-extended-spectrum-%C3%AE-lactamase-producing-enterobacteriaceae-a-five-year-follow-up-study
#18
V Nordberg, K Jonsson, C G Giske, A Iversen, O Aspevall, B Jonsson, A Camporeale, M Norman, L Navér
OBJECTIVE: To analyse Klebsiella pneumoniae (KP) isolates from an outbreak of Extended-Spectrum β-Lactamase (ESBL)-producing KP and Escherichia coli (ESBL-EC) among infants admitted to neonatal intensive care units (NICUs) and to determine the duration of the intestinal colonization. METHODS: A prospective cohort study of intestinal ESBL-KP/ ESBL-EC colonized neonates after a five-month outbreak in two NICUs. Whole genome sequencing (WGS), multilocus sequence typing (MLST), core genome MLST, pulsed-field electrophoresis (PFGE) and PCR for blaCTX-M were performed on the first isolates...
January 8, 2018: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29325684/respiratory-comorbidities-and-risk-of-mortality-in-hospitalized-patients-with-idiopathic-pulmonary-fibrosis
#19
Keishi Oda, Kazuhiro Yatera, Yoshihisa Fujino, Takashi Kido, Tetsuya Hanaka, Konomi Sennari, Kiyohide Fushimi, Shinya Matsuda, Hiroshi Mukae
BACKGROUND: Respiratory comorbidities are frequently associated with idiopathic pulmonary fibrosis (IPF). However, little is known about their prognostic impact in hospitalized patients with IPF. We examined the impact of respiratory comorbidities on the mortality rates of hospitalized patients with IPF using a Japanese nationwide database. METHODS: We identified 5665 hospitalized patients diagnosed with IPF between April 2010 and March 2013. The primary outcome was defined as the in-hospital mortality at 30 days after admission...
January 2018: Respiratory Investigation
https://www.readbyqxmd.com/read/29324657/%C3%AE-glucosidase-inhibition-and-antibacterial-activity-of-secondary-metabolites-from-the-ecuadorian-species-clinopodium-taxifolium-kunth-govaerts
#20
Vladimir Morocho, Andrea Valle, Jessica García, Gianluca Gilardoni, Luis Cartuche, Alírica I Suárez
The phytochemical investigation of both volatile and fixed metabolites of Clinopodium taxifolium (Kunth) Govaerts (Lamiaceae) was performed for the first time. It allowed the isolation and characterization of the essential oil and six known compounds: carvacrol (1), squalane (2), uvaol (3), erythrodiol (4), ursolic acid (5), and salvigenin (6). Their structures were identified and characterized by Nuclear Magnetic Resonance (NMR) and Gas Chromatography coupled to Mass Spectroscopy (GC-MS), and corroborated by literature...
January 11, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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