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Sepsis and infections

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https://www.readbyqxmd.com/read/28943151/genomic-characterization-phylogenetic-analysis-and-identification-of-virulence-factors-in-aerococcus-sanguinicola-and-aerococcus-urinae-strains-isolated-from-infection-episodes
#1
Derya Carkaci, Katrine Højholt, Xiaohui Chen Nielsen, Rimtas Dargis, Simon Rasmussen, Ole Skovgaard, Kurt Fuursted, Paal Skytt Andersen, Marc Stegger, Jens Jørgen Christensen
Aerococcus sanguinicola and Aerococcus urinae are emerging pathogens in clinical settings mostly being causative agents of urinary tract infections (UTIs), urogenic sepsis and more seldomly complicated infective endocarditis (IE). Limited knowledge exists concerning the pathogenicity of these two species. Eight clinical A. sanguinicola (isolated from 2009 to 2015) and 40 clinical A. urinae (isolated from 1984 to 2015) strains from episodes of UTIs, bacteremia, and IE were whole-genome sequenced (WGS) to analyze genomic diversity and characterization of virulence genes involved in the bacterial pathogenicity...
September 21, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28942840/apoptosis-induced-by-staphylococcus-aureus-toxins
#2
REVIEW
Xiaopeng Zhang, Xiaomei Hu, Xiancai Rao
Apoptosis stimulated by bacterial toxins is common during infection and is now considered important in disease processes. As a major human pathogen, Staphylococcus aureus also causes apoptosis during infection. In some diseases such as atopic dermatitis and sepsis, the apoptosis induced by S. aureus influences the severity and outcome of diseases. S. aureus has various toxins, many of which have reportedly triggered apoptosis. In this review, we focused on the apoptosis-inducing toxins secreted by S. aureus, and their underlying mechanisms...
December 2017: Microbiological Research
https://www.readbyqxmd.com/read/28942469/early-versus-late-diagnosis-of-complement-factor-i-deficiency-clinical-consequences-illustrated-in-two-families-with-novel-homozygous-cfi-mutations
#3
Clara Franco-Jarava, Elena Álvarez de la Campa, Xavier Solanich, Francisco Morandeira-Rego, Virgínia Mas-Bosch, Marina García-Prat, Xavier de la Cruz, Andrea Martín-Nalda, Pere Soler-Palacín, Manuel Hernández-González, Roger Colobran
The complement system is an important effector arm of innate immunity and plays a crucial role in the defense against common pathogens. But effective defense and maintenance of homeostasis requires a careful balance between complement activation and regulation. Factor I (FI) is one of the most important regulators of the complement system. Complete FI deficiency is a rare autosomal recessive disorder typically resulting in severe, recurrent infection by encapsulated bacteria. In the present study, we describe two patients from unrelated families with complete FI deficiency diagnosed at very different ages: Patient 1 is a 60-year-old man who had experienced several severe infections (pneumonia, meningitis, sepsis) since childhood, one of which caused significant and permanent neurologic sequelae...
September 23, 2017: Journal of Clinical Immunology
https://www.readbyqxmd.com/read/28941536/rationale-for-adjunctive-therapies-for-pediatric-sepsis-induced-multiple-organ-failure
#4
REVIEW
Bradley S Podd, Dennis W Simon, Santiago Lopez, Andrew Nowalk, Rajesh Aneja, Joseph A Carcillo
Adjunctive therapies have been proposed for use in at least 5 inflammation pathobiology phenotypes in pediatric sepsis-induced multiple organ failure. This article discusses host-pathogen interaction prototypes to facilitate understanding of the rationale for personalized therapy in these phenotypes. The article discusses the literature on adjunctive antiinflammatory and immune modulation therapies that, in addition to traditional organ support and infection source control, might be part of a personalized precision medicine approach to the reversal of each of these inflammatory pathobiology phenotypes...
October 2017: Pediatric Clinics of North America
https://www.readbyqxmd.com/read/28940032/the-impact-of-22q11-2-microdeletion-on-cardiac-surgery-postoperative-outcome
#5
Goran Cuturilo, Danijela Drakulic, Ida Jovanovic, Slobodan Ilic, Jasna Kalanj, Irena Vulicevic, Misela Raus, Dejan Skoric, Marija Mijovic, Biljana Medjo, Snezana Rsovac, Milena Stevanovic
22q11.2 microdeletion is the most common microdeletion in humans. The purpose of this study was to evaluate postoperative outcome in children with 22q11.2 microdeletion who had undergone complete surgical correction of a congenital heart defect. The study included 34 patients who underwent complete correction of conotruncal heart defects. Of these, 17 patients diagnosed with 22q11.2 microdeletion represent the investigated group. Another 17 patients without 22q11.2 microdeletion represent the control group...
September 22, 2017: Pediatric Cardiology
https://www.readbyqxmd.com/read/28939855/infection-with-burkholderia-pseudomallei-immune-correlates-of-survival-in-acute-melioidosis
#6
Susanna J Dunachie, Kemajittra Jenjaroen, Catherine J Reynolds, Kathryn J Quigley, Ruhena Sergeant, Manutsanun Sumonwiriya, Panjaporn Chaichana, Suchintana Chumseng, Pitchayanant Ariyaprasert, Patricia Lassaux, Louise Gourlay, Charuporn Promwong, Prapit Teparrukkul, Direk Limmathurotsakul, Nicholas P J Day, Daniel M Altmann, Rosemary J Boyton
Melioidosis, caused by Burkholderia pseudomallei, is a potentially lethal infection with no licensed vaccine. There is little understanding of why some exposed individuals have no symptoms, while others rapidly progress to sepsis and death, or why diabetes confers increased susceptibility. We prospectively recruited a cohort of 183 acute melioidosis patients and 21 control subjects from Northeast Thailand and studied immune parameters in the context of survival status and the presence or absence of diabetes...
September 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28939442/association-of-cytolethal-distending-toxin-ii-gene-positive-escherichia-coli-with-escherichia-albertii-an-emerging-enteropathogen
#7
Atsushi Hinenoya, Noritomo Yasuda, Natsuko Mukaizawa, Sikander Sheikh, Yuko Niwa, Sharda Prasad Awasthi, Masahiro Asakura, Teizo Tsukamoto, Akira Nagita, M John Albert, Shinji Yamasaki
Cytolethal distending toxin (CDT)-producing Escherichia coli have been isolated from patients with diarrhea, sepsis and urinary tract infection. CDT of E. coli is divided into five types (CDT-I through CDT-V) based on differences in amino acid sequences and its genomic location. However, in our recent studies, a few strains of cdt-II gene-positive bacteria, initially identified as atypical E. coli, were re-identified as Escherichia albertii, an emerging enteropathogen, by extensive characterization including multilocus sequence (MLS) analysis and sugar utilization tests...
September 19, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28939438/comparative-whole-genome-analysis-of-three-consecutive-salmonella-diarizonae-isolates
#8
Roman G Gerlach, Steffi Walter, Michael McClelland, Christiane Schmidt, Matthias Steglich, Rita Prager, Jennifer K Bender, Stephan Fuchs, Christoph Schoerner, Wolfgang Rabsch, Werner Lang, Jonathan Jantsch
Infections of very young children or immunocompromised people with Salmonella of higher subspecies are a well-known phenomenon often associated with contact to cold-blooded animals. We describe the molecular characterization of three S. enterica subsp. diarizonae strains, isolated consecutively over a period of several months from a hospital patient suffering from diarrhea and sepsis with fatal outcome. With the initial isolate the first complete genome sequence of a member of subsp. diarizonae is provided and based on this reference we revealed the genomic differences between the three isolates by use of next-generation sequencing and confirmed by phenotypical tests...
September 5, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28937407/time-course-of-septic-shock-in-immunocompromised-and-nonimmunocompromised-patients
#9
Matthieu Jamme, Fabrice Daviaud, Julien Charpentier, Nathalie Marin, Michaël Thy, Yannick Hourmant, Jean-Paul Mira, Frédéric Pène
OBJECTIVES: To address the impact of underlying immune conditions on the course of septic shock with respect to both mortality and the development of acute infectious and noninfectious complications. DESIGN: An 8-year (2008-2015) monocenter retrospective study. SETTING: A medical ICU in a tertiary care center. PATIENTS: Patients diagnosed for septic shock within the first 48 hours of ICU admission were included. Patients were classified in four subgroups with respect to their immune status: nonimmunocompromised and immunocompromised distributed into hematologic or solid malignancies and nonmalignant immunosuppression...
September 20, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28937303/palliative-coverage-of-cranial-defect-following-failed-cranial-flap-for-advanced-squamous-cell-carcinoma-case-report
#10
Vyacheslav Makler, Jeffrey S Litt, N Scott Litofsky
INTRODUCTION: With advanced-stage head and neck cancers, patients may develop large and/or complex wounds despite multiple reconstruction attempts. Wound coverage may require novel approaches to palliate the patient. METHOD: We present the case of a 56-year-old female with advanced squamous cell carcinoma of the scalp and skull who required multiple surgical interventions. Despite our best reconstructive efforts, the patient subsequently developed scalp infection and sepsis, necessitating further debridement for source control...
September 22, 2017: Journal of Palliative Medicine
https://www.readbyqxmd.com/read/28937074/clinicoepidemiological-profile-of-peritonitis-complicating-acute-peritoneal-dialysis-a-single-center-experience
#11
Kunal Gandhi, Dharmendra Prasad, Vinay Malhotra, Dhananjai Agrawal, Pankaj Beniwal, Amith Vijay Leon Dsouza
A prospective observational study examining the incidence and microbiological aspects of peritonitis complicating acute intermittent peritoneal dialysis (IPD) was performed. A total of 145 acute IPD treatments were included involving 112 patients. The majority of patients suffered from acute kidney injury (72.3%) secondary to sepsis. Peritonitis occurred in 31 treatment sessions, giving a frequency of 21.4% of procedures performed. The mean interval between starting dialysis and the first sign of peritonitis was 2...
September 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28936965/-important-role-of-interleukin-35-in-infectious-diseases-and-its-significance
#12
Renqi Yao, Yao Wu, Bing Ma
Infectious diseases are resulted from the invasion of an organism's body tissues by multiple disease-causing agents. It has been demonstrated that the occurrence and development of infectious diseases are closely associated with the functional status of immune system. Cytokines play significant roles in modulating the host immune response to the clearance of pathogenic microorganisms and maintaining immune homeostasis. Interleukin-35 (IL-35), as a newly identified member of IL-12 family, exerts suppressive effect on immune response by means of a specific pattern...
September 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28936682/early-versus-delayed-source-control-in-open-abdomen-management-for-severe-intra-abdominal-infections-a-retrospective-analysis-on-111-cases
#13
Stefano Rausei, Vincenzo Pappalardo, Laura Ruspi, Antonio Colella, Simone Giudici, Vincenzo Ardita, Francesco Frattini, Francesca Rovera, Luigi Boni, Gianlorenzo Dionigi
BACKGROUND: Time to source control plays a determinant prognostic role in patients having severe intra-abdominal infections (IAIs). Open abdomen (OA) management became an effective treatment option for peritonitis. Aim of this study was to analyze the correlation between time to source control and outcome in patients presenting with abdominal sepsis and treated by OA. METHODS: We retrospectively analyzed 111 patients affected by abdominal sepsis and treated with OA from May 2007 to May 2015...
September 21, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28935918/host-directed-therapies-for-bacterial-and-viral-infections
#14
REVIEW
Stefan H E Kaufmann, Anca Dorhoi, Richard S Hotchkiss, Ralf Bartenschlager
Despite the recent increase in the development of antivirals and antibiotics, antimicrobial resistance and the lack of broad-spectrum virus-targeting drugs are still important issues and additional alternative approaches to treat infectious diseases are urgently needed. Host-directed therapy (HDT) is an emerging approach in the field of anti-infectives. The strategy behind HDT is to interfere with host cell factors that are required by a pathogen for replication or persistence, to enhance protective immune responses against a pathogen, to reduce exacerbated inflammation and to balance immune reactivity at sites of pathology...
September 22, 2017: Nature Reviews. Drug Discovery
https://www.readbyqxmd.com/read/28935900/antibacterial-and-immunomodulatory-activities-of-insect-defensins-dlp2-and-dlp4-against-multidrug-resistant-staphylococcus-aureus
#15
Zhanzhan Li, Ruoyu Mao, Da Teng, Ya Hao, Huixian Chen, Xiumin Wang, Xiao Wang, Na Yang, Jianhua Wang
Methicillin-resistant Staphylococcus aureus (MRSA), are the most frequent cause of sepsis, which urgently demanding new drugs for treating infection. Two homologous insect CSαβ peptides-DLP2 and DLP4 from Hermetia illucens were firstly expressed in Pichia pastoris, with the yields of 873.5 and 801.3 mg/l, respectively. DLP2 and DLP4 displayed potent antimicrobial activity against Gram-positive bacteria especially MRSA and had greater potency, faster killing, and a longer postantibiotic effect than vancomycin...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28933370/a-case-of-systemic-infection-caused-by-streptococcus-pyogenes-oral-infection-in-an-edentulous-patient
#16
Yumi Inagaki, Masanobu Abe, Ryoko Inaki, Liang Zong, Hideyuki Suenaga, Takahiro Abe, Kazuto Hoshi
BACKGROUND: Infections in the oral and maxillofacial region can sometimes extend beyond the oral cavity, with serious consequences. Most oral infections are odontogenic, occurring through the root apex of the tooth or the periodontal pocket. It thus makes sense that edentulous patients have a much lower risk of oral bacterial infection. For this reason, while there are many reports on systemic infections caused by oral infections, few of these describe such infections in edentulous patients...
August 18, 2017: Diseases (Basel)
https://www.readbyqxmd.com/read/28933172/-development-of-views-on-pathophysiology-of-sepsis
#17
Jiří Beneš
Sepsis was understood as a disease caused by an invasive bacterial infection associated with deluging of organism with bacterial toxins (blood poisoning). Schottmüllers definition emphasized the existence of a focus as the source of invading bacteria. Further research led to the discovery of the cytokine cascade and to the recognition that sepsis is induced by our own endogenous mediators. The dysfunction or failure of various organs in sepsis can be explained both by hemodynamic disorders which originate in the altered microcapillars but also by a complex transformation of metabolism...
2017: Vnitr̆ní Lékar̆ství
https://www.readbyqxmd.com/read/28931235/monoclonal-antibody-protects-against-acinetobacter-baumannii-infection-by-enhancing-bacterial-clearance-and-evading-sepsis
#18
Travis B Nielsen, Paul Pantapalangkoor, Brian M Luna, Kevin W Bruhn, Jun Yan, Ken Dekitani, Sarah Hsieh, Brandon Yeshoua, Bryan Pascual, Evgeny Vinogradov, Kristine M Hujer, T Nicholas Domitrovic, Robert A Bonomo, Thomas A Russo, Magda Lesczcyniecka, Thomas Schneider, Brad Spellberg
Background: Extremely drug-resistant (XDR) Acinetobacter baumannii is one of the most commonly encountered, highly resistant pathogens requiring novel therapeutic interventions. Methods: We developed C8, a monoclonal antibody (mAb), by immunizing mice with sublethal inocula of a hypervirulent XDR clinical isolate. Results: C8 targets capsular carbohydrate on the bacterial surface, enhancing opsonophagocytosis. Treating with a single dose of C8 as low as 0...
August 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28931118/unpacking-the-enabling-factors-for-hand-cord-and-birth-surface-hygiene-in-zanzibar-maternity-units
#19
Giorgia Gon, Said M Ali, Catriona Towriss, Catherine Kahabuka, Ali O Ali, Sue Cavill, Mohammed Dahoma, Sally Faulkner, Haji S Haji, Ibrahim Kabole, Emma Morrison, Rukaiya M Said, Amour Tajo, Yael Velleman, Susannah L Woodd, And Wendy J Graham
Recent national surveys in The United Republic of Tanzania have revealed poor standards of hygiene at birth in facilities. As more women opt for institutional delivery, improving basic hygiene becomes an essential part of preventative strategies for reducing puerperal and newborn sepsis. Our collaborative research in Zanzibar provides an in-depth picture of the state of hygiene on maternity wards to inform action. Hygiene was assessed in 2014 across all 37 facilities with a maternity unit in Zanzibar. We used a mixed methods approach, including structured and semi-structured interviews, and environmental microbiology...
October 1, 2017: Health Policy and Planning
https://www.readbyqxmd.com/read/28930915/microvesicle-subsets-in-sepsis-due-to-community-acquired-pneumonia-compared-to-faecal-peritonitis
#20
Hazem M S Lashin, Suchita Nadkarni, Silvia Oggero, Hefin R Jones, Julian C Knight, Charles J Hinds, Mauro Perretti
RATIONALE: Microvesicles (MV) act as a non-soluble means of inter-cellular communication, with effector roles in disease pathogenesis and potentially as biomarkers. Previously, we reported that neutrophil MV expressing alpha-2-macroglobulin (A2MG) are protective in experimental sepsis and associate with survival in a small cohort of patients with sepsis due to community acquired pneumonia (CAP). OBJECTIVES: To characterise MV profiles in sepsis due to CAP or faecal peritonitis (FP) and determine their relation to outcome...
September 19, 2017: Shock
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