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pseudomonas infection

A Hernández, G Yagüe, E García Vázquez, M Simón, L Moreno Parrado, M Canteras, J Gómez
OBJECTIVE: Pseudomonas aeruginosa is one of the major pathogens causing hospital-acquired infections. In recent years, antimicrobial resistance is increasing and multidrug resistant (MDR) and extremely drug resistant (XDR) isolates have been associated with an increase of mortality. The aim of this study is to assess the clinical significance and analyze predictors and prognostic factors. METHODS: Prospective case-control non-paired study involving 64 patients with P...
March 21, 2018: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
Xuan Qin, Chuan Zhou, Danielle M Zerr, Amanda Adler, Amin Addetia, Shuhua Yuan, Alexander L Greninger
Clinical isolates of Pseudomonas aeruginosa from patients with cystic fibrosis (CF) are known to differ from those associated with non-CF hosts by colony morphology, drug susceptibility patterns, and genomic hypermutability. Pseudomonas aeruginosa isolates from CF patients have long been recognized for their overall reduced rate of antimicrobial susceptibility, but their intraclonal MIC heterogeneity has long been overlooked. Using two distinct cohorts of clinical strains ( n = 224 from 56 CF patients, n = 130 from 68 non-CF patients) isolated in 2013, we demonstrated profound Etest MIC heterogeneity in CF P...
March 2018: MSphere
Heba Y Al Dawodeyah, Nathir Obeidat, Luay F Abu-Qatouseh, Asem A Shehabi
Introduction: Pseudomonas aeruginosa is a common agent causing community acquired and nosocomial respiratory tract infections, with particularly life-threatening manifestations in patients who are immunocompromised of who have cystic fibrosis. This study investigated the occurrence of extended-spectrum β-lactamases (ESBLs) and metallo β-lactamase (MBL) in association with important putative virulence genes and genotypes variation among P. aeruginosa isolates from respiratory tract infection of Jordanian patients...
March 2018: Germs
Kuili Fang, Xing Jin, Seok Hoon Hong
Many chronic infections involve bacterial biofilms, which are difficult to eliminate using conventional antibiotic treatments. Biofilm formation is a result of dynamic intra- or inter-species interactions. However, the nature of molecular interactions between bacteria in multi-species biofilms are not well understood compared to those in single-species biofilms. This study investigated the ability of probiotic Escherichia coli Nissle 1917 (EcN) to outcompete the biofilm formation of pathogens including enterohemorrhagic E...
March 21, 2018: Scientific Reports
L J Li, Y M Liu, Y M Wang, F Zhou, H Li, X Q Xing, X D Han, L Chen, C X Zhang, J X Wang, B Liu, L J Suo, G H Yu, G Q Wang, X X Yao, Y Xiao, X L Zhu, C X Xue, X J Cui, B Cao
Objective: To explore the clinical features, etiological features and prognostic risk factors of long-term glucocorticoid users with community-acquired pneumonia (CAP). Methods: A retrospective study included 100 long-term glucocorticoid users with CAP (G-CAP group) from 11 hospitals of China between January 2014 and December 2014, while 100 non-immunocompromised patients with community-acquired pneumonia were enrolled as controls (nICH-CAP group). Characteristics including age, gender, underlying diseases, corticosteroids, symptoms, disease severity, imaging manifestations, etiology, respiratory failure, mechanical ventilation, whether the application of vasoactive drugs, antibiotics application, hospital mortality rate between the two groups were compared, and the prognostic factors of G-CAP were investigated using Logistic regression...
March 13, 2018: Zhonghua Yi Xue za Zhi [Chinese medical journal]
Karen E Bowker, Alan R Noel, Sharon Tomaselli, Marie Attwood, Alasdair P MacGowan
Background: The pharmacodynamics of inhaled antimicrobials are poorly studied. Amikacin is being developed for inhalational therapy as BAY 41-6551. Objectives: We employed an in vitro pharmacokinetic model to study the pharmacokinetics/pharmacodynamics of amikacin. Methods: A dose-ranging design was used to establish fAUC/MIC and fCmax/MIC targets for static, -1 log drop and -2 log drop effects for strains of Escherichia coli, Klebsiella pneumoniae and Pseudomonas aeruginosa...
March 19, 2018: Journal of Antimicrobial Chemotherapy
Fernando Pablo Canale, Silvia Del Valle Dávila, Corina Verónica Sasso, Nicolás Wilson Pellarín, María Aída Mattar Domínguez
Pseudomonas aeruginosa is an opportunistic pathogen implicated in nosocomial infections for which no vaccines have been approved. Larrea divaricata Cav. (Jarilla) is a widely spread plant in America and it is used in folk medicine to treat several pathologies. It has also been shown that antibodies elicited against Jarilla proteins of crude extract (JPCE) cross-react with proteins from gram-negative bacteria. In this study we aim to assess the contribution of anti-JPCE antibodies in the opsonophagocytosis of P...
March 17, 2018: Microbial Pathogenesis
Refilwe Given Kudumela, Peter Masoko
There is very little scientific information on indigenous plants used for medicinal purposes. Therefore, the aim of the study was to evaluate the antibacterial and antioxidant activities of the leaves of Commelina africana, Elephantorrhiza elephantina, Dombeya rotundifolia, and the whole plant excluding the roots of Schkuhria pinnata indigenous medicinal plants from the Limpopo Province, which may be used for the treatment in humans infected with bacterial pathogens. The screening of different phytoconstituents using standard methods revealed the presence of terpenoids, flavonoids, tannins, and saponins...
January 2018: J Evid Based Integr Med
Carlos Rumbo, Juan Antonio Tamayo-Ramos, M Federica Caso, Antonio Rinaldi, Lorena Romero-Santacreu, Roberto Quesada, Santiago Cuesta
Electrospun biodegradable polymers have emerged as promising materials for their applications in several fields, including biomedicine and food industry. For this reason, the susceptibility of these materials to be colonized by different pathogens is a critical issue for public health, and their study can provide future knowledge to develop new strategies against bacterial infections. In this work, the ability of three pathogenic bacterial species ( Pseudomonas aeruginosa, Acinetobacter baumannii and Listeria monocytogenes) to adhere and form biofilm in electrospun polycaprolactone (PCL) microfibrous meshes was investigated...
March 20, 2018: ACS Applied Materials & Interfaces
Ping-Feng Wu, Yi-Tsung Lin, Fu-Der Wang, Tsuey-Ching Yang, Chang-Phone Fung
PURPOSE: Pseudomonas aeruginosa bacteraemia is associated with high mortality, and most monotherapies are beta-lactam-based. We aimed to investigate clinical outcomes of definitive fluoroquinolone monotherapy versus beta-lactam monotherapy for P. aeruginosa bacteraemia. METHODS: This retrospective study enrolled adult patients receiving definitive monotherapy with beta-lactam or fluoroquinolone between November 2013 and November 2014 at Taipei Veterans General Hospital...
March 20, 2018: Infection
Francesca Forti, Dwayne R Roach, Marco Cafora, Maria E Pasini, David S Horner, Ersilia V Fiscarelli, Martina Rossitto, Lisa Cariani, Federica Briani, Laurent Debarbieux, Daniela Ghisotti
The alarming diffusion of multidrug resistant (MDR) bacterial strains requires investigations on non-antibiotic therapies. Amongst them, the use of bacteriophages (phages) as antimicrobial agents, namely phage therapy, is a promising treatment strategy with support by recent successful compassionate treatments in Europe and the U.S.A. In this work, we combined host range and genomic information to design a 6-phage cocktail killing several clinical strains of P. aeruginosa , including those collected from Italian cystic fibrosis (CF) patients, and analyzed the cocktail performance...
March 19, 2018: Antimicrobial Agents and Chemotherapy
Yoshio Takesue, Shinya Kusachi, Hiroshige Mikamo, Junko Sato, Akira Watanabe, Hiroshi Kiyota, Satoshi Iwata, Mitsuo Kaku, Hideaki Hanaki, Yoshinobu Sumiyama, Yuko Kitagawa, Kazuhiko Nakajima, Takashi Ueda, Motoi Uchino, Toru Mizuguchi, Yoshiyasu Ambo, Masafumi Konosu, Keiichiro Ishibashi, Akihisa Matsuda, Kazuo Hase, Yasushi Harihara, Koji Okabayashi, Shiko Seki, Takuo Hara, Koshi Matsui, Yoichi Matsuo, Minako Kobayashi, Shoji Kubo, Kazuhisa Uchiyama, Junzo Shimizu, Ryohei Kawabata, Hiroki Ohge, Shinji Akagi, Masaaki Oka, Toshiro Wakatsuki, Katsunori Suzuki, Kohji Okamoto, Katsunori Yanagihara
The principle of empirical therapy for patients with intra-abdominal infections (IAI) should include antibiotics with activity against Enterobacteriaceae and Bacteroides fragilis group species. Coverage of Pseudomonas aeruginosa, Enterobacter cloacae, and Enterococcus faecalis is also recommended for hospital-associated IAI. A nationwide survey was conducted to investigate the antimicrobial susceptibility of pathogens isolated from postoperative IAI. All 504 isolates were collected at 26 institutions and referred to a central laboratory for susceptibility testing...
March 16, 2018: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
Graciela Rodríguez-Sevilla, Marta García-Coca, David Romera-García, John Jairo Aguilera-Correa, Ignacio Mahíllo-Fernández, Jaime Esteban, Concepción Pérez-Jorge
Lung disease in cystic fibrosis (CF) is characterized by the progressive colonization of the respiratory tract by different bacteria, which develop polymicrobial biofilms. In the past decades, there has been an increase in the number of CF patients infected with Non-Tuberculous Mycobacteria (NTM). Although Mycobacterium abscessus is the main NTM isolated globally, little is known about M. abscessus multispecies biofilm formation. In the present study we developed an in vitro model to study the phenotypic characteristics of biofilms formed by M...
March 6, 2018: International Journal of Medical Microbiology: IJMM
Adham Abu Taha, Ayman Daoud, Sawsan Zaid, Sajida Sammour, Maram Belleh, Refqa Daifi
BACKGROUND: Active surveillance is important in infection control programmes, allowing the detection of patients colonised with multi-drug resistant organisms and preventing the spread of multi-drug resistant organisms. The aim of this study was to determine the rate of asymptomatic colonisation with multi-drug resistant organisms and the prevalence of each organism in patients transferred to An-Najah National University Hospital, Nablus, occupied Palestinian territory. METHODS: Patients transferred from other hospitals between January and December, 2015, were screened at time of admission by taking nasal, groin, and axillary swabs...
February 21, 2018: Lancet
Dirk Westhölter, Jens Hiller, Ulrike Denzer, Susanne Polywka, Francis Ayuk, Meike Rybczynski, Thomas Horvatits, Swantje Gundlach, Nicole Fischer, Marylyn M Addo, Sven Peine, Burkhard Göke, Ansgar W Lohse, Marc Lütgehetmann, Sven Pischke
BACKGROUND: Routine Hepatitis E Virus (HEV) testing of blood products has recently been implemented in Great-Britain and the Netherlands. The relevance of transfusion-transmitted HEV infections is still controversially discussed in Europe. METHODS: All blood donations at the University Medical Center Hamburg-Eppendorf were prospectively tested for HEV-RNA by pooled PCR from October 2016 to May 2017. Reactive samples were individually re-tested. Additionally, stored samples from previous donations of positive donors were tested to determine the duration of HEV-viremia...
March 15, 2018: Journal of Hepatology
Jumpei Uchiyama, Ryu Shigehisa, Tadahiro Nasukawa, Keijiro Mizukami, Iyo Takemura-Uchiyama, Takako Ujihara, Hironobu Murakami, Ichiro Imanishi, Koji Nishifuji, Masahiro Sakaguchi, Shigenobu Matsuzaki
The combined use of phage and antibiotics can show synergistic antimicrobial effects, so-called phage-antibiotic synergy (PAS). Here, we screened and examined PAS against Pseudomonas aeruginosa in vitro. Testing four different phages infecting P. aeruginosa, phage KPP22 classified within the family Myoviridae genus Pbunavirus showed PAS with the widest range of antibiotics, and showed PAS with anti-Pseudomonas drugs such as piperacillin and ceftazidime. Thus, evidence suggests that the combined use of phage and antibiotics is a promising therapeutic strategy against P...
March 17, 2018: Archives of Virology
Francesca Micoli, Paolo Costantino, Roberto Adamo
Cell surface carbohydrates have been proven optimal targets for vaccine development. Conjugation of polysaccharides to a carrier protein triggers a T-cell dependent immune response to the glycan moiety. Licensed glycoconjugate vaccines are produced by chemical conjugation of capsular polysaccharides to prevent meningitis caused by meningococcus, pneumococcus and Haemophilus influenzae type b. However, other classes of carbohydrates (O-antigens, exopolysaccharides, wall/teichoic acids) represent attractive targets for developing vaccines...
March 14, 2018: FEMS Microbiology Reviews
Asmaa E Kassab, Ehab M Gedawy
As we are interested in synthetizing biologically active leads with dual anticancer and antibacterial activity, we adopted biology oriented drug synthesis (BIODS) strategy to synthesize a series of novel ciprofloxacin (CP) hybrids. The National Cancer Institute (USA) selected seventeen newly synthesized compounds for anticancer evaluation against 59 different human tumor cell lines. Five compounds 3e, 3f, 3h, 3o and 3p were further studied through determination of IC50 values against the most sensitive cancer cell lines...
March 9, 2018: European Journal of Medicinal Chemistry
Enrico Gugliandolo, Roberta Fusco, Giovanna Ginestra, Ramona D'amico, Carlo Bisignano, Giuseppina Mandalari, Salvatore Cuzzocrea, Rosanna Di Paola
BACKGROUND: Colonization with Pseudomonas aeruginosa (PA), the most common pathogen isolated mainly in patients with cystic fibrosis, is particularly difficult to eradicate and is associated with acceleration of decline in lung function and with poorer prognosis. PA LPS is recognized by toll like receptors 4 (TLR4) and has been shown to induce lung inflammation in vivo. In addition, regulation of this process is essential for proper pathogen clearance and to prevent excessive inflammatory response resulting in tissue damage...
March 15, 2018: Shock
David Williams, Joanne L Fothergill, Benjamin Evans, Jessica Caples, Sam Haldenby, Martin J Walshaw, Michael A Brockhurst, Craig Winstanley, Steve Paterson
Pseudomonas aeruginosa chronic infections of cystic fibrosis (CF) airways are a paradigm for within-host evolution with abundant evidence for rapid evolutionary adaptation and diversification. Recently emerged transmissible strains have spread globally, with the Liverpool Epidemic Strain (LES) the most common strain infecting the UK CF population. Previously we have shown that highly divergent lineages of LES can be found within a single infection, consistent with super-infection among a cross-sectional cohort of patients...
March 16, 2018: Microbial Genomics
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