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gram-negative bacteremia

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https://www.readbyqxmd.com/read/29776609/threshold-level-of-riemerella-anatipestifer-crossing-blood-brain-barrier-and-expression-profiles-of-immune-related-proteins-in-blood-and-brain-tissue-from-infected-ducks
#1
Shengdou Li, Xiaowei Gong, Qiwei Chen, Fuying Zheng, Guo Ji, Yongsheng Liu
Riemerella anatipestifer (R. anatipestifer) is a Gram-negative bacterium that crosses the blood-brain barrier (BBB) and causes meningitis with neurological symptoms in infected ducks. A threshold level of bacteremia must be reached before the BBB can be breached. In this study, the bacterial burden and expression profiles of immune-related proteins in blood and brain tissue samples from R. anatipestifer-infected ducks were investigated. The data showed that R. anatipestifer could cross the BBB with low-level bacteremia of 7...
June 2018: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29774878/-etiology-and-risk-factors-for-meningitis-and-or-bacteremia-after-craniotomy-for-patients-with-glioma
#2
Yaning Wang, Yu Wang, Wenbin Ma
To evaluate the incidence and microbiological profile of meningitis and/or bacteremia after craniotomy in patients with glioma and analyze the risk factors relevant to postoperative meningitis.
 Methods: All demographic data, etiological data and clinical data for hospitalized patients who underwent craniotomy in Dept. of Neurosurgery of Peking Union Medical College Hospital between Jan. 2013 to Dec. 2017 were recorded.
 Results: The incidence of post-craniotomy meningitiswas 7.73%, bacteremia was 2.21% and meningitis combined with bacteremia was 1...
April 28, 2018: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/29768249/detection-of-cytomegalovirus-in-saliva-from-infants-undergoing-sepsis-evaluation-in-the-neonatal-intensive-care-unit-the-virion-c-study
#3
Andrea Ronchi, Christopher P Ouellette, Asuncion Mejías, Douglas Salamon, Amy Leber, Lorenza Pugni, Fabio Mosca, Pablo J Sánchez
OBJECTIVE: To determine the frequency of detection of cytomegalovirus (CMV) among infants evaluated for late-onset sepsis in the neonatal intensive care unit (NICU). STUDY DESIGN: This study was a prospective cohort study. RESULTS: During the 13-month study, 84 infants underwent 116 sepsis evaluations, and CMV DNA was detected in saliva in three (4%) infants (median: gestational age 28 weeks, birth weight 950 g), representing 5% (n=6) of all sepsis evaluations...
May 16, 2018: Journal of Perinatal Medicine
https://www.readbyqxmd.com/read/29753321/influence-of-pathogen-and-focus-of-infection-on-procalcitonin-values-in-sepsis-patients-with-bacteremia-or-candidemia
#4
Daniel O Thomas-Rüddel, Bernhard Poidinger, Matthias Kott, Manfred Weiss, Konrad Reinhart, Frank Bloos
BACKGROUND: This study aimed to evaluate the accuracy of procalcitonin (PCT) serum concentrations to diagnose Gram-negative bacteremia and the association of PCT serum concentrations with more specific pathogens and the focus of infection. METHODS: Secondary analysis of the prospectively collected patient-level dataset from a cluster randomized quality improvement trial was performed. The trial included sepsis patients with organ dysfunction treated in the participating intensive care units from 2011 to 2015...
May 13, 2018: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/29747632/mycotic-aneurysm-caused-by-edwardsiella-tarda-successfully-treated-with-stenting-and-suppressive-antibiotic-therapy-a-case-report-and-systematic-review
#5
Kei Furui Ebisawa, Sho Nishimura, Shungo Yamamoto, Goh Ohji, Kentaro Iwata
BACKGROUND: Mycotic aneurysm is an uncommon disease which could be fatal without appropriate treatment. Although standard therapy for mycotic aneurysms consists of resection of the infected aorta and in situ graft replacement, some treat with endovascular stent-grafting because patients may not tolerate graft replacement due to underlying diseases. There are 6 more reported cases of mycotic aneurysm caused by Edwardsiella tarda. With the exception of our case, all underwent resection and debridement of the infected aorta or vascular prosthesis...
May 10, 2018: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/29746596/the-hyr1-protein-from-the-fungus-candida-albicans-is-a-cross-kingdom-immunotherapeutic-target-for-acinetobacter-bacterial-infection
#6
Priya Uppuluri, Lin Lin, Abdullah Alqarihi, Guanpingsheng Luo, Eman G Youssef, Sondus Alkhazraji, Nannette Y Yount, Belal A Ibrahim, Michael Anthony Bolaris, John E Edwards, Marc Swidergall, Scott G Filler, Michael R Yeaman, Ashraf S Ibrahim
Different pathogens share similar medical settings and rely on similar virulence strategies to cause infections. We have previously applied 3-D computational modeling and bioinformatics to discover novel antigens that target more than one human pathogen. Active and passive immunization with the recombinant N-terminus of Candida albicans Hyr1 (rHyr1p-N) protect mice against lethal candidemia. Here we determine that Hyr1p shares homology with cell surface proteins of the multidrug resistant Gram negative bacterium, Acinetobacter baumannii including hemagglutinin (FhaB) and outer membrane protein A (OmpA)...
May 10, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29733508/fast-rapid-determinations-of-antibiotic-susceptibility-phenotypes-using-label-free-cytometry
#7
Tzu-Hsueh Huang, Yih-Ling Tzeng, Robert M Dickson
Sepsis, a life-threatening immune response to blood infections (bacteremia), has a ∼30% mortality rate and is the 10th leading cause of US hospital deaths. The typical bacterial loads in adult septic patients are ≤100 bacterial cells (colony forming units, CFU) per ml blood, while pediatric patients exhibit only ∼1000 CFU/ml. Due to the low numbers, bacteria must be propagated through ∼24-hours blood cultures to generate sufficient CFUs for diagnosis and further analyses. Herein, we demonstrate that, unlike other rapid post-blood culture antibiotic susceptibility tests (ASTs), our phenotypic approach can drastically accelerate ASTs for the most common sepsis-causing gram-negative pathogens by circumventing long blood culture-based amplification...
May 7, 2018: Cytometry. Part A: the Journal of the International Society for Analytical Cytology
https://www.readbyqxmd.com/read/29731080/carbapenem-resistant-acinetobacter-baumannii-bacteremia-in-liver-transplant-recipients
#8
Y J Kim, S I Kim, Y D Lee, H J Choi, J Y Choi, S K Yoon, Y-K You, D-G Kim
BACKGROUND: Acinetobacter baumannii has become an increasingly important nosocomial pathogen. Carbapenem is the preferred drug of choice for treatment of multidrug-resistant gram-negative bacilli, but carbapenem-resistant A baumannii (CRAB) has now emerged. The aim of this study was to determine the incidence, outcomes, and risk factors for CRAB bacteremia in liver transplant recipients. METHODS: The medical records of 393 subjects who underwent living donor liver transplant at Seoul St...
May 2018: Transplantation Proceedings
https://www.readbyqxmd.com/read/29728100/raoultella-planticola-bacteremia-induced-fatal-septic-shock-following-burn-injury
#9
Tetsuya Yumoto, Hiromichi Naito, Hiromi Ihoriya, Kohei Tsukahara, Tomoyuki Ota, Toshiyuki Watanabe, Atsunori Nakao
BACKGROUND: Raoultella planticola, a Gram-negative, aerobic bacillus commonly isolated from soil and water, rarely causes invasive infections in humans. Septic shock from R. planticola after burn injury has not been previously reported. CASE PRESENTATION: A 79-year-old male was admitted to the emergency intensive care unit after extensive flame burn injury. He accidently caught fire while burning trash and plunged into a nearby tank filled with contaminated rainwater to extinguish the fire...
May 4, 2018: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/29718754/impact-of-total-body-weight-on-acute-kidney-injury-in-patients-with-gram-negative-bacteremia
#10
Ronald G Hall, Eunice Yoo, Andrew Faust, Terri Smith, Edward Goodman, Eric M Mortensen, Victoria Felder, Carlos A Alvarez
BACKGROUND: The impact of total body weight (TBW) on the development of acute kidney injury (AKI) associated with gram-negative bacteremia has not been previously evaluated. METHODS: The cohort included 323 patients >/ = 18 years old with gram-negative bacteremia (1/1/2008-8/31/2011) who received >/ = 48 hours of antibiotics. We compared the incidence of AKI in patients with a TBW </ = 80kg vs. >80kg with a multivariable stepwise logistic regression adjusting for age >/ = 70 years, baseline serum creatinine of > 2...
May 10, 2018: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/29670861/the-cynomolgus-macaque-natural-history-model-of-pneumonic-tularemia-for-predicting-clinical-efficacy-under-the-animal-rule
#11
Tina Guina, Lynda L Lanning, Kristian S Omland, Mark S Williams, Larry A Wolfraim, Stephen P Heyse, Christopher R Houchens, Patrick Sanz, Judith A Hewitt
Francisella tularensis is a highly infectious Gram-negative bacterium that is the etiologic agent of tularemia in animals and humans and a Tier 1 select agent. The natural incidence of pneumonic tularemia worldwide is very low; therefore, it is not feasible to conduct clinical efficacy testing of tularemia medical countermeasures (MCM) in human populations. Development and licensure of tularemia therapeutics and vaccines need to occur under the Food and Drug Administration's (FDA's) Animal Rule under which efficacy studies are conducted in well-characterized animal models that reflect the pathophysiology of human disease...
2018: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/29667100/severe-infections-in-systemic-lupus-erythematosus-disease-pattern-and-predictors-of-infection-related-mortality
#12
C L Teh, S A Wan, G R Ling
Infection is a major cause of morbidity and mortality among patients with systemic lupus erythematosus (SLE). To describe the pattern of serious infections in patients with SLE and to identify the predictors of infection-related mortality among SLE patients with serious infections, we prospectively studied all SLE patients who were hospitalized with infections in Sarawak General Hospital during 2011-2015. Demographic data, clinical features, and outcomes were collected. Cox regression analysis was carried out to determine the independent predictors of infection-related mortality...
April 18, 2018: Clinical Rheumatology
https://www.readbyqxmd.com/read/29664370/antimicrobial-resistance-in-invasive-bacterial-infections-in-hospitalized-children-cambodia-2007-2016
#13
Andrew Fox-Lewis, Junko Takata, Thyl Miliya, Yoel Lubell, Sona Soeng, Poda Sar, Kolthida Rith, Gregor McKellar, Vanaporn Wuthiekanun, Erin McGonagle, Nicole Stoesser, Catrin E Moore, Christopher M Parry, Claudia Turner, Nicholas P J Day, Ben S Cooper, Paul Turner
To determine trends, mortality rates, and costs of antimicrobial resistance in invasive bacterial infections in hospitalized children, we analyzed data from Angkor Hospital for Children, Siem Reap, Cambodia, for 2007-2016. A total of 39,050 cultures yielded 1,341 target pathogens. Resistance rates were high; 82% each of Escherichia coli and Klebsiella pneumoniae isolates were multidrug resistant. Hospital-acquired isolates were more often resistant than community-acquired isolates; resistance trends over time were heterogeneous...
May 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29619327/-brucella-vertebral-osteomyelitis-misidentified-as-an-ochrobactrum-anthropi-infection
#14
João Trêpa, Patricia Mendes, Raquel Gonçalves, Catarina Chaves, Ana Maria Brás, Andrea Mesa, Isabel Ramos, Rosa Sá, José Gabriel Saraiva da Cunha
Ochrobactrum anthropi is a Gram-negative bacillus widely distributed in nature. It is a low virulence and low pathogenic microorganism and human infection by this agent is considered rare. This microorganism can cause bacteremia and in some cases can lead to osteomyelitis and endocarditis. Included in Brucellaceae family, this bacterium is phenotypically and genetically closely related to the Brucella genus and may be misidentified by rapid identification systems. The authors describe a patient admitted to the Infectious Diseases Department with vertebral osteomyelitis initially identified as Ochrobactrum anthropi ...
2018: IDCases
https://www.readbyqxmd.com/read/29579836/early-bacterial-pneumonia-after-hepatic-transplantation-epidemiologic-profile
#15
J Prieto Amorin, M Lopez, K Rando, J Castelli, J Medina Presentado
BACKGROUND: Postoperative pulmonary complications are major cause of morbidity and mortality in patients receiving liver transplantation (LT), particularly bacterial pneumonia occurring within the first 100 days after transplantation. Our aim in this study was to determine the incidence, microorganisms involved, associated factors, and morbidity of bacterial pneumonia presenting in the first 100 days posttransplant. METHODS: We performed a cohort study in which patients receiving liver transplantation were included prospectively in our national database (Database of Infections in Transplantation of Solid Organs)...
March 2018: Transplantation Proceedings
https://www.readbyqxmd.com/read/29555630/comparison-of-septic-shock-due-to-mdr-acinetobacter-baumannii-or-klebsiella-pneumoniae-carbapenemase-producing-k-pneumoniae-in-icu-patients
#16
Alessandro Russo, Simone Giuliano, Giancarlo Ceccarelli, Francesco Alessandri, Alessandra Giordano, Grazia Brunetti, Mario Venditti
Objectives: a significant cause of mortality in intensive care unit (ICU) is represented by multidrug-resistant (MDR) gram-negative bacteria, such as MDR Acinetobacter baumannii (MDR-AB) and Klebsiella pneumoniae carbapenemase-producing Klebsiella pneumoniae (KPC-Kp). Aim of the present study was the comparison of clinical features, therapy and outcome of patients who developed septic shock due to either MDR-AB or KPC-Kp. Methods: were retrospectively analyzed patients admitted to the intensive care unit (ICU) of a teaching hospital, from November 2010 to December 2015, who developed septic shock due to MDR-AB or KPC-Kp infection...
March 19, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29542179/a-case-of-severe-hyponatremia-due-to-linezolid-induced-siadh
#17
P Ioannou, M Stavroulaki, V Mavrikaki, I Papakitsou, S Panagiotakis
WHAT IS KNOWN AND OBJECTIVE: Hyponatremia is the most common electrolyte disorder. Syndrome of inappropriate antidiuretic hormone secretion (SIADH) is the main cause of euvolemic hyponatremia and is often associated with medications or underlying diseases. Linezolid is a potent antibiotic against resistant Gram-positive microorganisms that has been associated with mild hyponatremia, yet with a mechanism different from SIADH. CASE SUMMARY: We present the case of a patient who developed severe hyponatremia during treatment with linezolid for an ampicillin-resistant E...
March 14, 2018: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/29541448/multidrug-resistant-gram-negative-bacterial-infections-in-a-teaching-hospital-in-ghana
#18
Nicholas Agyepong, Usha Govinden, Alex Owusu-Ofori, Sabiha Yusuf Essack
Background: Multidrug-resistant Gram-negative bacteria have emerged as major clinical and therapeutic dilemma in hospitals in Ghana.To describe the prevalence and profile of infections attributable to multidrug-resistant Gram-negative bacteria among patients at the Komfo Anokye Teaching Hospital in the Ashanti region of Ghana. Methods: Bacterial cultures were randomly selected from the microbiology laboratory from February to August, 2015. Bacterial identification and minimum inhibitory concentrations were conducted using standard microbiological techniques and the Vitek-2 automated system...
2018: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/29531446/diagnostic-value-of-procalcitonin-in-predicting-bacteremia-in-intensive-care-unit
#19
Tuna Demirdal, Pinar Sen, Salih Atakan Nemli
Background and Aims: Several biomarkers are used in the diagnosis of bacteremia. Procalcitonin (PCT) is more specific than other biomarkers in differentiating bacterial and nonbacterial inflammation. It was aimed to evaluate the diagnostic and prognostic value of PCT in bacteremic patients in Intensive Care Unit (ICU). Materials and Methods: A total of 156 patients diagnosed with noninfectious systemic inflammatory response syndrome, sepsis, and severe sepsis/septic shock in ICU between December 2014 and July 2015 were evaluated in this prospective cohort study...
February 2018: Indian Journal of Critical Care Medicine
https://www.readbyqxmd.com/read/29527202/comprehensive-evaluation-of-the-mbt-star-bl-module-for-simultaneous-bacterial-identification-and-%C3%AE-lactamase-mediated-resistance-detection-in-gram-negative-rods-from-cultured-isolates-and-positive-blood-cultures
#20
Annie W T Lee, Johnson K S Lam, Ricky K W Lam, Wan H Ng, Ella N L Lee, Vicky T Y Lee, Po P Sze, Rahim Rajwani, Kitty S C Fung, Wing K To, Rodney A Lee, Dominic N C Tsang, Gilman K H Siu
Objective: This study evaluated the capability of a MALDI Biotyper system equipped with the newly introduced MBT STAR-BL module to simultaneously perform species identification and β-lactamase-mediated resistance detection in bacteremia -causing bacteria isolated from cultured isolates and patient-derived blood cultures (BCs). Methods: Two hundred retrospective cultured isolates and 153 prospective BCs containing Gram-negative rods (GNR) were collected and subjected to direct bacterial identification, followed by the measurement of β-lactamase activities against ampicillin, piperacillin, cefotaxime, ceftazidime, and meropenem using the MBT STAR-BL module...
2018: Frontiers in Microbiology
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