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pseudomonas aeruginosa review

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https://www.readbyqxmd.com/read/28316289/post-stapedectomy-granuloma-a-devastating-complication
#1
E Watts, H R F Powell, S R Saeed, R M Irving
OBJECTIVES: This paper reports three cases of severe post-stapedectomy granuloma, emphasising the variable presentation of this devastating complication and the challenges of its management. METHODS: A retrospective review was conducted of three cases of post-stapedectomy granuloma requiring surgical debulking between 2010 and 2015. Clinical symptoms, serial imaging, histopathology and post-operative outcomes were considered. RESULTS: Intra-operatively, extensive granulation tissue with erosion of the otic capsule was found...
March 20, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28302376/emerging-trends-in-antibiotic-resistance-implications-for-emergency-medicine
#2
Ali Pourmand, Maryann Mazer-Amirshahi, Gregory Jasani, Larissa May
BACKGROUND: Many bacteria are demonstrating increasing levels of resistance to commonly used antibiotics. While this has implications for the healthcare system as a whole, many patients infected with these resistant organisms will initially present to the emergency department (ED). The purpose of this review is to provide a summary of current trends in infections caused by the most clinically relevant resistant organisms encountered in emergency medicine. METHODS: Bacteria were selected based on the Centers for Disease Control and Prevention's National Action Plan for Combating Antibiotic Resistant Bacteria, and PubMed database...
March 7, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28301918/pseudomonas-aeruginosa-biofilm-a-programmed-bacterial-life-for-fitness
#3
REVIEW
Keehoon Lee, Sang Sun Yoon
Biofilm is a community of microbes that typically inhabits on surfaces and is encased in an extracellular matrix. Biofilms display very dissimilar characteristics to their planktonic counterparts. Biofilms are ubiquitous in the environments and influence our life tremendously in both positive and negative ways. Pseudomonas aeruginosa is a bacterium, known to produce robust biofilms. P. aeruginosa biofilms cause severe problems in immunocompromised patients including those with cystic fibrosis or wound infection...
March 17, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28291668/under-utilization-of-taps-in-intensive-care-unit-as-a-cause-of-reservoirs-of-nonfermenting-gram-negative-bacilli
#4
Gonzalo de-Las-Casas-Cámara, María Dolores Martín-Ríos, Maria Isabel Adillo-Montero, María Carmen Muñoz-Egea, Javier Zapardiel-Ferrero, Concepción Pérez-Jorge Peremarch
INTRODUCTION: The under-utilisation of taps is associated with the generation of reservoirs of non-fermenting gram-negative bacilli with the ability to disseminate. We describe the detection and approach of the problem in an ICU. METHODS: Observational descriptive study in an ICU with individual cubicles with their own sink. We collected clinical samples from patients and environmental samples from tap aerators and reviewed the unit's hygiene measures. RESULTS: We detected four cases due to Chryseobacterium indologenes, one to Elizabethkingia meningoseptica and another to Pseudomonas aeruginosa; they were identified both in clinical and the environmental samples...
March 10, 2017: Enfermedades Infecciosas y Microbiología Clínica
https://www.readbyqxmd.com/read/28282951/interactions-between-neutrophils-and-pseudomonas-aeruginosa-in-cystic-fibrosis
#5
REVIEW
Balázs Rada
Cystic fibrosis (CF) affects 70,000 patients worldwide. Morbidity and mortality in CF is largely caused by lung complications due to the triad of impaired mucociliary clearance, microbial infections and chronic inflammation. Cystic fibrosis airway inflammation is mediated by robust infiltration of polymorphonuclear neutrophil granulocytes (PMNs, neutrophils). Neutrophils are not capable of clearing lung infections and contribute to tissue damage by releasing their dangerous cargo. Pseudomonas aeruginosa is an opportunistic pathogen causing infections in immunocompromised individuals...
March 9, 2017: Pathogens
https://www.readbyqxmd.com/read/28276116/epidemiology-of-bacterial-conjunctivitis-in-chinchillas-chinchilla-lanigera-49-cases-2005-to-2015
#6
S Ozawa, C Mans, Z Szabo, N Di Girolamo
OBJECTIVES: To evaluate the anamnesis, clinical signs, diagnostic test results, treatment and outcome of chinchillas diagnosed with bacterial conjunctivitis. METHODS: Medical records of 49 chinchillas diagnosed with bacterial conjunctivitis were retrospectively reviewed. Association between clinical signs and type of bacteria involved was determined by means of univariate logistic regression. RESULTS: 61·5% of the isolated bacteria were Gram-negative, and the most common bacterial species was Pseudomonas aeruginosa (50%), followed by Staphylococcus species (26·9%)...
April 2017: Journal of Small Animal Practice
https://www.readbyqxmd.com/read/28264910/the-expanding-role-of-type-ii-secretion-in-bacterial-pathogenesis-and-beyond
#7
Nicholas P Cianciotto, Richard C White
Type II secretion (T2S) is one means by which Gram-negative pathogens secrete proteins into the extracellular milieu and/or host organisms. Based upon recent genome sequencing, it is clear that T2S is largely restricted to the Proteobacteria, occurring in many, but not all genera in the α-, β-, γ-, and δ- classes. Prominent human and/or animal pathogens that express a T2S system(s) include Acinetobacter baumannii, Burkholderia pseudomallei, Chlamydia trachomatis, Escherichia coli, Klebsiella pneumoniae, Legionella pneumophila, Pseudomonas aeruginosa, Stenotrophomonas maltophilia, Vibrio cholerae, and Yersinia enterocolitica T2S-expressing plant pathogens include Dickeya dadantii, Erwinia amylovora, Pectobacterium carotovorum, Ralstonia solanacearum, Xanthomonas campestris, Xanthomonas oryzae, and Xylella fastidiosa T2S also occurs in non-pathogenic bacteria, facilitating symbioses, among other things...
March 6, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28261568/pseudomonas-aeruginosa-lifestyle-a-paradigm-for-adaptation-survival-and-persistence
#8
REVIEW
M Fata Moradali, Shirin Ghods, Bernd H A Rehm
Pseudomonas aeruginosa is an opportunistic pathogen affecting immunocompromised patients. It is known as the leading cause of morbidity and mortality in cystic fibrosis (CF) patients and as one of the leading causes of nosocomial infections. Due to a range of mechanisms for adaptation, survival and resistance to multiple classes of antibiotics, infections by P. aeruginosa strains can be life-threatening and it is emerging worldwide as public health threat. This review highlights the diversity of mechanisms by which P...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28260939/infectious-anastomotic-pseudoaneurysm-complicating-renal-allograft-case-report-and-review-of-literature
#9
Marvin Mt Chung, Yiu Che Chan, Yuk Law, Stephen Wk Cheng
Infectious anastomotic pseudoaneurysm complicating renal transplant is rare, but probably under-reported with <30 cases worldwide. We report a 45-year-old man with hypertension, diabetes mellitus and end stage renal failure, who had a renal transplant anastomosed to the right external iliac artery and vein. Postoperatively, he made a slow recovery with malaise and persistent vague right iliac fossa discomfort. Ultrasound scan 1 month postoperatively showed perinephric collection, and fluid culture grew Enterococcus faecium and Pseudomonas aeruginosa...
2017: International Journal of Nephrology and Renovascular Disease
https://www.readbyqxmd.com/read/28258920/odontogenic-sinusitis-maxillaris-a-retrospective-study-of-121-cases-with-surgical-intervention
#10
Matthias Zirk, Timo Dreiseidler, Matthias Pohl, Daniel Rothamel, Johannes Buller, Franziska Peters, Joachim E Zöller, Matthias Kreppel
PURPOSE: Otolaryngologists, dentists and maxilla-facial surgeons see patients suffering from odontogenic maxillary sinusitis on a daily routine. The study was performed to investigate the different origins of the odontogenic maxillary sinusitis ranging from periodontitis to augmentative implant surgery. Furthermore, the microbial flora of purulent odontogenic maxillary sinusitis was analyzed in order to present a proper antibiotic treatment in addition to a surgical approach. MATERIALS AND METHODS: A retrospective study was performed, analyzing the clinical trials of 121 patients suffering from odontogenic maxillary sinusitis who undergone surgery...
February 4, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28258668/pathogenic-factors-of-pseudomonas-aeruginosa-the-role-of-biofilm-in-pathogenicity-and-as-a-target-for-phage-therapy
#11
Fairoz Al-Wrafy, Ewa Brzozowska, Sabina Górska, Andrzej Gamian
Pseudomonas aeruginosa is an opportunistic pathogen that can cause several acute and chronic infections in humans, and it has become an important cause of nosocomial infections and antibiotic resistance. Biofilm represents an important virulence factor for these bacteria, plays a role in P. aeruginosa infections and avoidance of immune defence mechanisms, and has the ability to protect the bacteria from antibiotics. Alginate, Psl and Pel, three exopolysaccharides, are the main components in biofilm matrix, with many biological functions attributed to them, especially with respect to the protection of the bacterial cell from antibiotics and the immune system...
February 14, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28254026/the-fate-of-inhaled-antibiotics-after-deposition-in-cystic-fibrosis-how-to-get-drug-to-the-bug
#12
REVIEW
Aukje C Bos, Kimberly M Passé, Johan W Mouton, Hettie M Janssens, Harm A W M Tiddens
BACKGROUND: Chronic airway infections in patients with cystic fibrosis (CF) are most often treated with inhaled antibiotics of which deposition patterns have been extensively studied. However, the journey of aerosol particles does not end after deposition within the bronchial tree. OBJECTIVES: To review how local conditions affect the clinical efficacy of antibiotic aerosol particles after deposition in the airways of patients with CF. METHODS: Electronic databases were searched from inception to September 2015...
January 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28253831/an-update-on-emerging-therapies-for-urinary-tract-infections
#13
Aneela Majeed, Sumaiah Alarfaj, Rabih Darouiche, Mayar Mohajer
Urinary tract infections (UTIs) are the most common healthcare-acquired infections, and are associated with high morbidity and mortality. Worldwide use of antibiotics has led to a significant rise in resistant uropathogens emanating from both hospitals and communities. The huge concern of multidrug resistance (MDR) has led the Food and Drug Administration (FDA) to encourage drug companies to invest in the development of new antibiotics. Area covered: In this review we summarized data on already approved antibiotics, and selected emerging therapies that are currently in phase II and III trials with emphasis on complicated urinary tract infections (cUTIs)...
March 2017: Expert Opinion on Emerging Drugs
https://www.readbyqxmd.com/read/28238638/critical-review-on-biosurfactant-analysis-purification-and-characterization-using-rhamnolipid-as-a-model-biosurfactant
#14
REVIEW
Sunita J Varjani, Vivek N Upasani
Surfactants are one of the most versatile group of chemicals used in various industrial processes. Their market is competitive, and manufacturers will have to expand surfactant production in ecofriendly and cost effective manner. Increasing interest in biosurfactants led to an intense research for environment friendly and cost-efficient production of biosurfactant. Structural diversity and functional properties of biosurfactants make them an attractive group of compounds for potential use in wide variety of industrial, environmental and biotechnological applications...
February 16, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28231368/is-malignant-otitis-externa-on-the-increase-a-retrospective-review-of-cases
#15
Diana Bhasker, Angela Hartley, Frank Agada
We performed a retrospective review of all patients with malignant otitis externa (MOE) treated in our center between July 2004 and December 2012 to evaluate the current epidemiology in our region and to ascertain causative factors associated with the perceived increase in the number of cases diagnosed. Eleven patients were identified (5 men and 6 women), with a mean age of 77 years (range: 38 to 97 years). Diabetes was present in 36%. Pseudomonas aeruginosa was the causative organism in 64% of cases; all pathogens were sensitive to ciprofloxacin...
February 2017: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/28229205/-spectrum-of-pathogens-in-postoperative-complications-of-visceral-surgery-the-problem-of-multidrug-resistance
#16
A Kramer, J Pochhammer, P Walger, U Seifert, M Ruhnke, J C Harnoss
In general surgery the etiology of surgical site infections has not significantly changed over the last 30 years. Gram-positive bacteria, e.g. coagulase negative staphylococci (CNS), Staphylococcus aureus and Enterococcus spp. as well as Gram-negative bacteria, e.g. Escherichia coli, Enterobacter spp., Klebsiella spp. and Pseudomonas aeruginosa, are the most common findings. Although in general surgery 10% of the S. aureus causing postoperative wound infections were methicillin resistant (MRSA), no cases of multidrug-resistant Gram-negative (MRGN) bacteria were reported...
February 22, 2017: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
https://www.readbyqxmd.com/read/28222444/inflammation-a-double-edged-sword-in-the-response-to-pseudomonas-aeruginosa-infection
#17
Christina K Lin, Barbara I Kazmierczak
The Gram-negative opportunistic pathogen Pseudomonas aeruginosa exploits failures of barrier defense and innate immunity to cause acute infections at a range of anatomic sites. We review the defense mechanisms that normally protect against P. aeruginosa pulmonary infection, as well as the bacterial products and activities that trigger their activation. Innate immune recognition of P. aeruginosa is critical for pathogen clearance; nonetheless, inflammation is also associated with pathogen persistence and poor host outcomes...
February 22, 2017: Journal of Innate Immunity
https://www.readbyqxmd.com/read/28215711/biomarkers-for-cystic-fibrosis-drug-development
#18
REVIEW
Marianne S Muhlebach, J P Clancy, Sonya L Heltshe, Assem Ziady, Tom Kelley, Frank Accurso, Joseph Pilewski, Nicole Mayer-Hamblett, Elizabeth Joseloff, Scott D Sagel
PURPOSE: To provide a review of the status of biomarkers in cystic fibrosis drug development, including regulatory definitions and considerations, a summary of biomarkers in current use with supportive data, current gaps, and future needs. METHODS: Biomarkers are considered across several areas of CF drug development, including cystic fibrosis transmembrane conductance regulator modulation, infection, and inflammation. RESULTS: Sweat chloride, nasal potential difference, and intestinal current measurements have been standardized and examined in the context of multicenter trials to quantify CFTR function...
November 2016: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
https://www.readbyqxmd.com/read/28195963/mediastinitis-following-endobronchial-ultrasound-guided-transbronchial-needle-aspiration
#19
Aruna Jahoor, Shekhar Ghamande, Shirley Jones, Carl Boethel, Heath D White
Mediastinitis is a rare complication of endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA). Recent reports of infectious complications following EBUS-TBNA involved oropharyngeal bacteria. Here, we report 2 unusual cases of post-EBUS-TBNA mediastinitis involving Streptococcus pneumoniae and Pseudomonas aeruginosa, which were likely the result of direct inoculation of the organisms at the time of transbronchial needle aspiration. The first case was successfully treated with computed tomography-guided drainage and antibiotics, whereas the second case had >50% distal tracheal obstruction and near total occlusion of the left main stem bronchus, requiring rigid bronchoscopy, stent placement, debulking, and antibiotics...
February 10, 2017: Journal of Bronchology & Interventional Pulmonology
https://www.readbyqxmd.com/read/28195681/recent-advances-in-the-discovery-of-pqsd-inhibitors-as-antimicrobial-agents
#20
REVIEW
Ziteng Zhou, Shutao Ma
The treatment of the infections caused by Pseudomonas aeruginosa, an opportunistic Gram-negative bacterium, is very difficult. High intrinsic tolerance toward common antibiotics and the development of new resistant strains challenge us to find a new treatment as soon as possible. PqsD is an enzyme essential for the P. aeruginosa quorum-sensing apparatus, which catalyzes the final and key step in the biosynthesis of 4-hydroxy-2-heptylquinolone (HHQ), which is a signal molecule of the P. aeruginosa quorum-sensing system...
February 14, 2017: ChemMedChem
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