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https://www.readbyqxmd.com/read/28544183/clinical-outcomes-of-intestinal-transplant-recipients-colonized-with-multi-drug-resistant-organisms-a-retrospective-study
#1
Jacques Simkins, Michele I Morris, Jose F Camargo, Rodrigo Vianna, Thiago Beduschi, Lilian M Abbo
Rates of multi-drug resistant organisms (MDRO) colonization among intestinal transplant (ITx) recipients have not been reported. Colonization rates with vancomycin-resistant Enterococcus (VRE), carbapenem-resistant gram-negative bacteria (CR-GNB) and methicillin-resistant Staphylococcus aureus (MRSA) were obtained retrospectively in adults undergoing ITx (isolated or multi-visceral) from 1/2009-12/2015. We assessed for VRE, CR-GNB and MRSA bacteremia during the first year post-transplant for patients colonized with VRE, CR-GNB and MRSA respectively and for those who were not colonized...
May 19, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28542918/multisite-external-validation-of-a-risk-prediction-model-for-the-diagnosis-of-blood-stream-infections-in-febrile-pediatric-oncology-patients-without-severe-neutropenia
#2
Adam J Esbenshade, Zhiguo Zhao, Catherine Aftandilian, Raya Saab, Rachel L Wattier, Melissa Beauchemin, Tamara P Miller, Jennifer J Wilkes, Michael J Kelly, Alison Fernbach, Michael Jeng, Cindy L Schwartz, Christopher C Dvorak, Yu Shyr, Karl G M Moons, Maria-Luisa Sulis, Debra L Friedman
BACKGROUND: Pediatric oncology patients are at an increased risk of invasive bacterial infection due to immunosuppression. The risk of such infection in the absence of severe neutropenia (absolute neutrophil count ≥ 500/μL) is not well established and a validated prediction model for blood stream infection (BSI) risk offers clinical usefulness. METHODS: A 6-site retrospective external validation was conducted using a previously published risk prediction model for BSI in febrile pediatric oncology patients without severe neutropenia: the Esbenshade/Vanderbilt (EsVan) model...
May 23, 2017: Cancer
https://www.readbyqxmd.com/read/28542614/evaluation-of-the-sepsis-flow-chip-assay-for-the-diagnosis-of-blood-infections
#3
Antonio Galiana, Javier Coy, Adelina Gimeno, Noemi Marco Guzman, Francisco Rosales, Esperanza Merino, Gloria Royo, Juan Carlos Rodríguez
BACKGROUND: Blood infections are serious complex conditions that generally require rapid diagnosis and treatment. The big challenge is to reduce the time necessary to make a diagnosis with current clinical microbiological methods so as to improve the treatment given to patients. METHODS: In this study, we assess for the first time the Sepsis Flow Chip assay, which is a novel diagnostic assay for simultaneous rapid-detection of the vast majority of bloodstream pathogens, including Gram-positive and Gram-negative bacteria and fungi, in the same assay, and for the detection of most common antibiotic resistance genes...
2017: PloS One
https://www.readbyqxmd.com/read/28539343/multicenter-clinical-evaluation-of-bact-alert-virtuo-blood-culture-system
#4
Michael R Jacobs, Tony Mazzulli, Kevin C Hazen, Caryn E Good, Ayman M Abdelhamed, Pauline Lo, Bianche Shum, Katharine P Roman, Danielle C Robinson
Background: The BacT/ALERT VIRTUO is an advanced, automated blood culture system incorporating improved automation and an enhanced detection algorithm to shorten time to detection.Methods: Multicenter study of the investigational VIRTUO system (bioMérieux, Inc., Durham, NC) compared to BacT/ALERT 3D (BTA3D) for detection of bacteremia/fungemia in four bottle types, SA and FA Plus (aerobic) and SN and FN Plus (anaerobic) in a clinical setting with patient samples, in a matched system design clinical trial. Blood was added to paired aerobic or anaerobic bottles, with volume in each bottle pair required to be ≤10 mL per bottle and within 30% of each other...
May 24, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28534213/impact-of-antimicrobial-stewardship-and-rapid-microarray-testing-on-patients-with-gram-negative-bacteremia
#5
K R Rivard, V Athans, S W Lam, S M Gordon, G W Procop, S S Richter, E Neuner
A rapid microarray assay, Nanosphere Verigene® Gram-negative blood culture test (BC-GN), detects four Gram-negative species, four Gram-negative genera, and six resistance genes directly from positive blood culture samples, shortening the time from Gram stain to pathogen and resistance-gene identification. The purpose of this study was to determine the impact of the BC-GN paired with an antimicrobial stewardship intervention on antimicrobial and clinical outcomes. Patients with Gram-negative bacteremia were compared before (n = 456) and after (n = 421) BC-GN implementation...
May 23, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28514306/unusual-case-of-rapid-growing-intraabdominal-abscess-caused-by-stenotrophomonas-maltophilia-after-laparoscopic-appendectomy-due-to-perforated-appendicitis-a-case-report
#6
Dae Ro Lim, Jung Cheol Kuk, Taehyung Kim, Eung Jin Shin
INTRODUCTION: An intraabdominal abscess due to Stenotrophomonas maltophilia (S maltophilia) infection is a very rare clinical manifestation. S maltophilia is a glucose nonfermentative, aerobic, gram-negative, mobile, and biofilm-forming bacterium. It is an opportunistic pathogen and uncommon cause of infection. Respiratory tract infections (pneumonia) and bloodstream infections (bacteremia) are the most common clinical manifestations of S maltophilia infection. CONCLUSIONS: This case report describes an unusual case of a rapidly growing, extremely large intraabdominal abscess (within 1 week during antibiotic therapy), which was detected 2 weeks after a laparoscopic appendectomy was performed for perforated appendicitis and was caused by multidrug-resistant S maltophilia infection...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28506633/-anaerobiospirillum-succiniciproducens-and-desulfovibrio-desulfuricans-in-2-cases-of-insidious-bacteremia
#7
Silvia C Predari, Adriana N de Paulis, Eugenia Bertona, Daiana Guevara Núñez, Juan P Suárez, Liliana Castello
Two cases of insidious bacteremia by uncommon curve and spiral-shaped, motile anaerobic gram-negative rods are presented. Both of them were of an unclear origin and occurred in immunosuppressed patients with simultaneous diseases. The key tests for the identification of Anaerobiospirillum were its micromorphology, a strictly anaerobic condition, negative catalase activity, the special-potency disk profile, glucose fermentation, and β-NAG production. Desulfovibrio species was identified by all the above preliminary tests but with a different disk profile, as well as for being asaccharolytic and desulfoviridin and H2S producer...
May 12, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/28494709/hypervirulent-klebsiella-pneumoniae-in-california-sea-lions-zalophus-californianus-pathologic-findings-in-natural-infections
#8
Mauricio Seguel, Nicole L Gottdenker, Kathleen Colegrove, Shawn Johnson, Carsten Struve, Elizabeth W Howerth
Tissues of stranded California sea lions ( Zalophus californianus) naturally infected with a hyperviruluent strain of Klebsiella pneumoniae were examined by histopathology and immunohistochemistry against the K. pneumoniae K2 capsular antigen. In 7 of 8 animals, there was severe purulent bronchopneumonia, sometimes complicated by fibrinonecrotizing pleuritis with pyothorax. In affected areas of lung, large numbers of degenerate neutrophils and macrophages were admixed with rare large extracellular and intracellular gram-negative bacilli surrounded by a prominent capsule...
January 1, 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28491889/infections-in-hematopoietic-cell-transplant-recipients-results-from-the-organ-transplant-infection-project-a-multicenter-prospective-cohort-study
#9
Mindy G Schuster, Angela A Cleveland, Erik R Dubberke, Carol A Kauffman, Robin K Avery, Shahid Husain, David L Paterson, Fernanda P Silveira, Tom M Chiller, Kaitlin Benedict, Kathleen Murphy, Peter G Pappas
BACKGROUND: Infection is a major cause of morbidity and mortality after allogeneic hematopoietic cell transplantation (HCT). Our object was to better define the epidemiology and outcomes of infections after HCT. METHODS: This was a prospective, multicenter cohort study of HCT recipients and conducted from 2006 to 2011. The study included 4 US transplant centers and 444 HCT recipients. Data were prospectively collected for up to 30 months after HCT using a standardized data collection tool...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28485359/spectrum-of-bacteremia-in-posthematopoietic-stem-cell-transplant-patients-from-an-indian-center
#10
A Ghafur, V Devarajan, R Raj, J Easow, T Raja
BACKGROUND: Despite the relatively low prevalence of Gram-positive bacteremic infections in Indian oncology patients, glycopeptides are extensively used for empirical management of febrile neutropenia. Our aim was to analyze the spectrum of bacteremia in posthematopoietic stem cell transplant (HSCT) recipients in our center and make a recommendation on glycopeptide use in this patient population. MATERIALS AND METHODS: Retrospective analysis of bacteremic data from HSCT recipients in a tertiary care oncology and transplant center from South India, between 2011 and 2013...
October 2016: Indian Journal of Cancer
https://www.readbyqxmd.com/read/28481638/impact-of-total-body-weight-on-30-day-mortality-in-patients-with-gram-negative-bacteremia
#11
Ronald G Hall, Eunice Yoo, Andrew Faust, Terri Smith, Edward Goodman, Eric M Mortensen, Steven Richardson, Carlos Alvarez
BACKGROUND: The impact of total body weight (TBW) on 30-day mortality 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 30-day mortality of TBW <70kg vs. >/=70kg with a multivariable stepwise logistic regression adjusting for age >/=70 years, cancer diagnosis, and Pitt bacteremia score of >/=4...
May 8, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/28480269/globicatella-sanguinis-osteomyelitis-and-bacteremia-review-of-an-emerging-human-pathogen-with-an-expanding-spectrum-of-disease
#12
Andy O Miller, Seanne P Buckwalter, Michael W Henry, Fann Wu, Katherine F Maloney, Bisrat K Abraham, Barry J Hartman, Barry D Brause, Susan Whittier, Thomas J Walsh, Audrey N Schuetz
BACKGROUND: Globicatella sanguinis is an uncommon pathogen that may be misdiagnosed as viridans group streptococci. We review the literature of Globicatella and report 2 clinical cases in which catalase-negative Gram-positive cocci resembling viridans group streptococci with elevated minimum inhibitory concentrations (MICs) to ceftriaxone were inconsistently identified phenotypically, with further molecular characterization and ultimate identification of G sanguinis. METHODS: Two clinical strains (from 2 obese women; 1 with a prosthetic hip infection and the other with bacteremia) were analyzed with standard identification methods, followed by matrix-assisted laser desorption ionization time-of-flight mass spectrometry, 16S recombinant ribonucleic acid (rRNA), and sodA polymerase chain reaction (PCR)...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28450472/paneth-cell-disruption-induced-necrotizing-enterocolitis-requires-live-bacteria-and-occurs-independent-of-tlr4-signaling
#13
Jessica R White, Huiyu Gong, Brock Pope, Patrick Schlievert, Steven J McElroy
OBJECTIVE: Necrotizing enterocolitis (NEC) remains a leading cause of morbidity and mortality in premature infants. Both human surgical specimens and animal models suggest a potential involvement of Paneth cells in NEC pathogenesis. Paneth cells play critical roles in epithelial homeostasis, innate immunity, and host-microbial interactions. Yet, the complex interplay between Paneth cell disruption, epithelial barrier dysfunction, and microbial-driven inflammation remains unclear in the immature intestine...
April 27, 2017: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/28418298/esbl-and-carbapenemase-producing-enterobacteriaceae-in-patients-with-bacteremia-yangon-myanmar-2014
#14
Tin O Myat, Rachel F Hannaway, Khwar N Zin, Wah W Htike, Kyu K Win, John A Crump, David R Murdoch, James E Ussher
Among 42 gram-negative bloodstream isolates from inpatients in 3 hospitals in Yangon, Myanmar, admitted during July-December 2014, 16 (38%) were extended-spectrum β-lactamase-producing Enterobacteriaceae and 6 (14%) produced carbapenemase. The high prevalence of multidrug-resistant gram-negative bacteria raises concerns about the empiric treatment of patients with sepsis in Yangon.
May 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28414672/a-strong-and-fortuitous-case-of-dyspnea
#15
R Hammer, M Sciaudone
CASE: A 48 year-old man with no past medical history was sent to our emergency department (ED); from a primary care clinic for hypertensive urgency of 200/130. The man reported an intermittent non-productive cough of approximately one year's duration and worsening dyspnea on exertion and orthopnea over the last month with lower extremity swelling. Of note, he emigrated from Honduras twenty years ago. Blood pressure normalized with administration of Lasix in the ED. Physical exam revealed rales in lung bases bilaterally, jugular venous distension, lower extremity pitting edema with serpiginous patches of erythema and excoriation, and a cardiac gallop...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28407420/dental-biofilm-infections-an-update
#16
REVIEW
Tove Larsen, Nils-Erik Fiehn
Teeth are colonized by oral bacteria from saliva containing more than 700 different bacterial species. If removed regularly, the dental biofilm mainly comprises oral streptococci and is regarded as resident microflora. But if left undisturbed, a complex biofilm containing up to 100 bacterial species at a site will build up and may eventually cause development of disease. Depending on local ecological factors, the composition of the dental biofilm may vary considerably. With access to excess carbohydrates, the dental biofilm will be dominated by mainly gram-positive carbohydrate-fermenting bacteria causing demineralization of teeth, dental caries, which may further lead to inflammation and necrosis in the pulp and periapical region, i...
April 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28403835/bacteremia-caused-by-bergeyella-zoohelcum-in-an-infective-endocarditis-patient-case-report-and-review-of-literature
#17
REVIEW
Yili Chen, Kang Liao, Lu Ai, Penghao Guo, Han Huang, Zhongwen Wu, Min Liu
BACKGROUND: Bergeyella zoohelcum is an aerobic, Gram-negative bacterium that is frequently isolated from the upper respiratory tract of dogs, cats and other mammals. Clinically, B. zoohelcum has been reported causing cellulitis, tenosynovitis, leg abscess and septicemia, which is closely connected with animal bites. Here we describe a case of bacteremia in an infective endocarditis (IE) patient caused by B. zoohelcum, in China. CASE PRESENTATION: A 27-year-old infective endocarditis woman who had no history of dog bite nor other mammal exposure suffered bacteremia caused by B...
April 12, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28386776/real-world-experience-with-oritavancin-therapy-in-invasive-gram-positive-infections
#18
Cassie L Stewart, Michelle S Turner, Jeremy J Frens, Cynthia B Snider, Jordan R Smith
INTRODUCTION: Oritavancin is a novel lipoglycopeptide approved for acute bacterial skin and skin structure infections. The pharmacokinetic profile and convenient one-time dosing make oritavancin an enticing option for other serious Gram-positive infections requiring prolonged treatment courses. Unfortunately, data for using oritavancin in these populations are limited. METHODS: We report ten cases of oritavancin use for invasive Gram-positive infections in our health system, and provide a review of the currently available literature regarding oritavancin therapy for invasive infections...
April 6, 2017: Infectious Diseases and Therapy
https://www.readbyqxmd.com/read/28358803/efficacy-of-polymyxin-b-immobilized-fiber-hemoperfusion-for-patients-with-septic-shock-caused-by-gram-negative-bacillus-infection
#19
Nobuyuki Saito, Kazuhiro Sugiyama, Testu Ohnuma, Takashi Kanemura, Michitaka Nasu, Yuya Yoshidomi, Yuta Tsujimoto, Hiroshi Adachi, Hiroyuki Koami, Aito Tochiki, Kota Hori, Yukiko Wagatsuma, Hisashi Matsumoto
Septic shock-associated mortality in intensive care units (ICUs) remains high, with reported rates ranging 30-50%. In particular, Gram-negative bacilli (GNB), which induce significant inflammation and consequent multiple organ failure, are the etiological bacterial agent in 40% of severe sepsis cases. Hemoperfusion using polymyxin B-immobilized fiber (PMX), which adsorbs endotoxin, is expected to reduce the inflammatory sepsis cascade due to GNB. However, the clinical efficacy of this treatment has not yet been demonstrated...
2017: PloS One
https://www.readbyqxmd.com/read/28352667/hepcidin-mediated-iron-sequestration-protects-against-bacterial-dissemination-during-pneumonia
#20
Kathryn R Michels, Zhimin Zhang, Alexandra M Bettina, R Elaine Cagnina, Debora Stefanova, Marie D Burdick, Sophie Vaulont, Elizabeta Nemeth, Tomas Ganz, Borna Mehrad
Gram-negative pneumonia is a dangerous illness, and bacterial dissemination to the bloodstream during the infection is strongly associated with death. Antibiotic resistance among the causative pathogens has resulted in diminishing treatment options against this infection. Hepcidin is the master regulator of extracellular iron availability in vertebrates, but its role in the context of host defense is undefined. We hypothesized that hepcidin-mediated depletion of extracellular iron during Gram-negative pneumonia protects the host by limiting dissemination of bacteria to the bloodstream...
March 23, 2017: JCI Insight
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