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https://www.readbyqxmd.com/read/28422970/the-gut-microbiota-as-a-modulator-of-innate-immunity-during-melioidosis
#1
Jacqueline M Lankelma, Emma Birnie, Tassili A F Weehuizen, Brendon P Scicluna, Clara Belzer, Riekelt H Houtkooper, Joris J T H Roelofs, Alex F de Vos, Tom van der Poll, Andries E Budding, W Joost Wiersinga
BACKGROUND: Melioidosis, caused by the Gram-negative bacterium Burkholderia pseudomallei, is an emerging cause of pneumonia-derived sepsis in the tropics. The gut microbiota supports local mucosal immunity and is increasingly recognized as a protective mediator in host defenses against systemic infection. Here, we aimed to characterize the composition and function of the intestinal microbiota during experimental melioidosis. METHODOLOGY/PRINCIPAL FINDINGS: C57BL/6 mice were infected intranasally with B...
April 19, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28409532/diagnosis-of-neonatal-sepsis-using-16s-rrna-polymerase-chain-reaction
#2
Harish Punia, Geeta Gathwala, Dhara B Dhaulakhandi, Mohammed Aamir
The gold standard for detecting bacterial sepsis is blood culture. However, the sensitivity of blood culture is low and the results take 48-72 h. Molecular assays for the detection of bacterial DNA permit early detection of a bacterial cause as the turnaround time is 6-8 h. We undertook an evaluation of the performance of universal bacterial primer (16S rRNA) polymerase chain reaction (PCR) in the diagnosis of neonatal sepsis at a tertiary care medical college teaching hospital. 16S rRNA PCR was positive in all cases of blood culture proven sepsis...
January 1, 2017: Tropical Doctor
https://www.readbyqxmd.com/read/28348769/clostridium-baratii-a-rare-case-of-pneumonia-associated-with-an-alzheimer-patient-in-rio-de-janeiro-brazil
#3
Carla Ormundo Gonçalves Ximenes Lima, Vinicius Magno da Rocha, Eliane de Oliveira Ferreira, Joaquim Santos Filho, Lucia Rodrigues Serradas, Rodrigo Otávio Silveira Silva, Francisco Carlos Faria Lobato, Regina Maria Cavalcanti Pilotto Domingues
INTRODUCTION: Clostridium baratii is rarely associated with human diseases. Infection is usuallcaused by ingestion of contaminated food, and infant botulism is the most common clinical presentation. CASE REPORT: Here we report a case of pneumonia by a non-toxigenic strain of C. baratii in an Alzheimer 70-year-old male with sepsis in Rio de Janeiro, Brazil. The micro-organism was identified by phenotypical tests, mass spectrometry (MALDI-TOF), DNA amplification (PCR) and sequencing of the 16S rRNA gene...
August 2016: JMM Case Reports
https://www.readbyqxmd.com/read/28330494/pseudomonas-oryzihabitans-sepsis-in-a-1-year-old-child-with-multiple-skin-rashes-a-case-report
#4
Michael Owusu, Ellis Owusu-Dabo, Godfred Acheampong, Isaac Osei, John Amuasi, Nimako Sarpong, Augustina Annan, Hsin-Ying Chiang, Chih-Horng Kuo, Se Eun Park, Florian Marks, Yaw Adu-Sarkodie
BACKGROUND: Pseudomonas oryzihabitans is a Pseudomonas bacterial organism rarely implicated in human infections. The bacterium has been isolated in a few reported cases of neurosurgical infections and patients with end-stage cirrhosis, sickle cell disease, and community-acquired urinary tract infections. Limited information exists in developing countries, however, because of the lack of advanced microbiological tools for identification and characterization of this bacterium. This case report describes the isolation of a rare Pseudomonas bacterium in a patient presenting with sepsis and skin infection...
March 23, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28252538/dietary-supplementation-with-nonfermentable-fiber-alters-the-gut-microbiota-and-confers-protection-in-murine-models-of-sepsis
#5
Michael J Morowitz, Valentina Di Caro, Diana Pang, Jessica Cummings, Brian Firek, Matthew B Rogers, Sarangarajan Ranganathan, Robert S B Clark, Rajesh K Aneja
OBJECTIVES: Links between microbial alterations and systemic inflammation have been demonstrated in chronic disease, but little is known about these interactions during acute inflammation. This study investigates the effect of dietary supplementation with cellulose, a nonfermentable fiber, on the gut microbiota, inflammatory markers, and survival in two murine models of sepsis. DESIGN: Prospective experimental study. SETTING: University laboratory...
May 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28238416/quantitative-multiplexed-tandem-pcr-for-direct-detection-of-bacteraemia-in-critically-ill-patients
#6
Andrew N Ginn, Briony Hazelton, Shereen Shoma, Martin Cullen, Thomas Solano, Jonathan R Iredell
Culture remains the gold standard for diagnosis of blood stream infections (BSI), but its clinical utility is limited by slow turnaround times. Here we describe a method for rapid quantitative detection of bacterial DNA directly extracted from whole blood using a multiplexed tandem real-time PCR (MT-PCR) assay targeting Staphylococcus, Streptococcus, Pseudomonas, Enterococcus and Enterobacteriaceae 16S rDNA genes. Results were available less than 3.5 hours after blood collection with all five bacterial targets having limits of detection between 10(1) and 10(3) CFU/mL...
April 2017: Pathology
https://www.readbyqxmd.com/read/28124968/-accurate-diagnosis-of-pseudomonas-luteola-in-routine-microbiology-laboratory-on-the-occasion-of-two-isolates
#7
Muharrem Çiçek, Gülşen Hasçelik, H Kaan Müştak, K Serdar Diker, Burçin Şener
Pseudomonas luteola which was previously known as Chryseomonas luteola; is a gram-negative, non-fermentative, aerobic, motile, non-spore-forming bacillus. It is frequently found as a saprophyte in soil, water and other damp environments and is an opportunistic pathogen in patients with underlying medical disorders or with indwelling catheters. It has been reported as an uncommon cause of bacteremia, sepsis, septic arthritis, meningitis, endocarditis, and peritonitis. Thus, early and accurate identification of this rare species is important for the treatment and also to provide information about the epidemiology of P...
October 2016: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28120645/neisseria-meningitidis-serogroup-c-sepsis-and-septic-arthritis-in-an-hiv-positive-man
#8
A Fox-Lewis, C P Eades, J J Manson, S Morris-Jones, R F Miller
A patient with well-controlled HIV-1 infection presented with fever and rigors, a widespread maculopapular rash, and severe generalised arthralgia. Sepsis of unknown aetiology was diagnosed, and treatment with broad-spectrum antimicrobials commenced. Following initial clinical improvement, a right knee septic arthritis developed. Microscopy and culture of the joint aspirate were negative for organisms but 16S rDNA PCR identified Neisseria meningitidis DNA, subsequently verified as capsular genogroup C, thus confirming a diagnosis of disseminated meningococcal sepsis with secondary septic arthritis...
January 1, 2017: International Journal of STD & AIDS
https://www.readbyqxmd.com/read/28102479/peripherally-inserted-central-catheter-related-bloodstream-infection-caused-by-kocuria-marina-in-an-elderly-man
#9
Nobuaki Mori, Yuichi Nishihara, Hideki Tayama, Akiko Higuchi, Yasuko Aoki
BACKGROUND: Kocuria species are Gram-positive, aerobic cocci, and members of the Micrcoccaceae family that are known to be opportunistic pathogens. Although there have been sporadic reports of infections caused by Kocuria species, little is known regarding their human pathogenicity and clinical characteristics. CASE REPORT: We herein report a case of a peripherally inserted central catheter (PICC)-related bloodstream infection caused by Kocuria marina in a 90-year-old Japanese with multiple cancer...
January 19, 2017: Infection
https://www.readbyqxmd.com/read/28093107/characterization-and-identification-of-microbial-communities-in-bovine-necrotic-vulvovaginitis
#10
N Y Shpigel, L Adler-Ashkenazy, S Scheinin, T Goshen, A Arazi, Z Pasternak, Y Gottlieb
Bovine necrotic vulvovaginitis (BNVV) is a severe and potentially fatal disease of post-partum cows that emerged in Israel after large dairy herds were merged. While post-partum cows are commonly affected by mild vulvovaginitis (BVV), in BNVV these benign mucosal abrasions develop into progressive deep necrotic lesions leading to sepsis and death if untreated. The etiology of BNVV is still unknown and a single pathogenic agent has not been found. We hypothesized that BNVV is a polymicrobial disease where the normally benign vaginal microbiome is remodeled and affects the local immune response...
January 2017: Veterinary Journal
https://www.readbyqxmd.com/read/27837233/critically-ill-patients-demonstrate-large-interpersonal-variation-in-intestinal-microbiota-dysregulation-a-pilot-study
#11
Jacqueline M Lankelma, Lonneke A van Vught, Clara Belzer, Marcus J Schultz, Tom van der Poll, Willem M de Vos, W Joost Wiersinga
PURPOSE: The intestinal microbiota has emerged as a virtual organ with essential functions in human physiology. Antibiotic-induced disruption of the microbiota in critically ill patients may have a negative influence on key energy resources and immunity. We set out to characterize the fecal microbiota composition in critically ill patients both with and without sepsis and to explore the use of microbiota-derived markers for clinical outcome measurements in this setting. METHODS: In this prospective observational cohort study we analyzed the fecal microbiota of 34 patients admitted to the intensive care unit...
January 2017: Intensive Care Medicine
https://www.readbyqxmd.com/read/27751177/successful-treatment-with-fecal-microbiota-transplantation-in-patients-with-multiple-organ-dysfunction-syndrome-and-diarrhea-following-severe-sepsis
#12
Yanling Wei, Jun Yang, Jun Wang, Yang Yang, Juan Huang, Hao Gong, Hongli Cui, Dongfeng Chen
BACKGROUND: The dysbiosis of intestinal microbiota plays an important role in the development of gut-derived infections, making it a potential therapeutic target against multiple organ dysfunction syndrome (MODS) after sepsis. However, the effectiveness of fecal microbiota transplantation (FMT) in treating this disease has been rarely investigated. METHODS: Two male patients, a 65-year-old and an 84-year-old, were initially diagnosed with cerebellar hemorrhage and cerebral infarction, respectively, after admission...
October 18, 2016: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/27610316/transmission-of-enterobacter-aerogenes-septicemia-in-healthcare-workers
#13
Piyush Jha, Choon-Mee Kim, Dong-Min Kim, Jong-Hoon Chung, Na-Ra Yoon, Babita Jha, Seok Won Kim, Sook Jin Jang, Young-Joon Ahn, Jae Keun Chung, Doo Young Jeon
Enterobacter aerogenes is recognized as an important bacterial pathogen in hospital-acquired infections. This report describes two unusual cases of septicemia caused by E. aerogenes in immunocompetent healthcare workers. E. aerogenes was isolated from blood cultures of the two patients experiencing septicemia. The clinical isolates were initially identified as E. aerogenes using a VITEK II automated system and 16S rRNA sequence analysis, and; both isolates involved in the outbreak shared a common pulse-field gel electrophoresis pattern...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27557119/whole-genomic-sequence-analysis-of-bacillus-infantis-defining-the-genetic-blueprint-of-strain-nrrl-b-14911-an-emerging-cardiopathogenic-microbe
#14
Chandirasegaran Massilamany, Akram Mohammed, John Dustin Loy, Tanya Purvis, Bharathi Krishnan, Rakesh H Basavalingappa, Christy M Kelley, Chittibabu Guda, Raúl G Barletta, Etsuko N Moriyama, Timothy P L Smith, Jay Reddy
BACKGROUND: We recently reported the identification of Bacillus sp. NRRL B-14911 that induces heart autoimmunity by generating cardiac-reactive T cells through molecular mimicry. This marine bacterium was originally isolated from the Gulf of Mexico, but no associations with human diseases were reported. Therefore, to characterize its biological and medical significance, we sought to determine and analyze the complete genome sequence of Bacillus sp. NRRL B-14911. RESULTS: Based on the phylogenetic analysis of 16S ribosomal RNA (rRNA) genes, sequence analysis of the 16S-23S rDNA intergenic transcribed spacers, phenotypic microarray, and matrix-assisted laser desorption ionization time-of-flight mass spectrometry, we propose that this organism belongs to the species Bacillus infantis, previously shown to be associated with sepsis in a newborn child...
2016: BMC Genomics
https://www.readbyqxmd.com/read/27525402/-a-sepsis-case-caused-by-a-rare-opportunistic-pathogen-bacillus-pumilus
#15
Barış Ata Borsa, Mehmet Ersoy Aldağ, Birsen Tunalı, Uğur Dinç, Zeynep Güngördü Dalar, Veli Cengiz Özalp
The high prevalence of Bacillus species in nature and the detection of these bacteria as contaminant in cultures may lead diagnostic dilemma, however they should still be considered as a pathogen particularly in case of repeated positive cultures from patients with risk factors. Bacillus pumilus is a bacteria, though rarely, been reported as the causative agent of various infections such as sepsis, endocarditis, skin infections and food poisoning in human. In this report, a sepsis case in an immunocompetent patient caused by B...
July 2016: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/27501947/fetal-tissues-tested-for-microbial-sterility-by-culture-and-pcr-based-methods-can-be-safely-used-in-clinics
#16
Yakov Vitrenko, Iryna Kostenko, Kateryna Kulebyakina, Alla Duda, Mariya Klunnyk, Khrystyna Sorochynska
Cell preparations to be used in clinical practice must be free of infectious agents. Safety concerns are especially elevated upon the use of human fetal tissues which are otherwise highly advantageous in cell therapy. We demonstrate that treating fetal samples with antibiotic, extensive washing and homogenization prior to cryoconservation efficiently removes microbes in general. Screening a large collection by an automatic culture system showed that 89% fetal tissue samples were sterile while contamination was detected in 10...
August 5, 2016: Cell Transplantation
https://www.readbyqxmd.com/read/27495286/lipid-emulsion-formulation-of-parenteral-nutrition-affects-intestinal-microbiota-and-host-responses-in-neonatal-piglets
#17
Celeste M Lavallee, Jayden A R MacPherson, Mi Zhou, Yanhua Gao, Pamela R Wizzard, Paul W Wales, Justine M Turner, Benjamin P Willing
BACKGROUND: Total parenteral nutrition (TPN) is a cause of intestinal microbial dysbiosis and impaired gut barrier function. This may contribute to life-threatening parenteral nutrition-associated liver disease and sepsis in infants. We compared the effects of a lipid emulsion containing long-chain ω-3 polyunsaturated fatty acids (PUFAs; SMOFlipid) and a predominantly ω-6 PUFA emulsion (Intralipid) on microbial composition and host response at the mucosal surface. MATERIALS AND METHODS: Neonatal piglets were provided isocaloric, isonitrogenous TPN for 14 days versus sow-fed (SF) controls...
August 5, 2016: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/27484181/the-potential-role-of-incorporating-real-time-pcr-and-dna-sequencing-for-amplification-and-detection-of-16s-rrna-gene-signatures-in-neonatal-sepsis
#18
Dina A Midan, Wafaa Moustafa M Abo El Fotoh, Abeer H El Shalakany
OBJECTIVES: This study aimed to explore whether 16S rRNA gene amplification by real time PCR and sequencing could serve as genetic-based methods in rapid and accurate diagnosis of neonatal sepsis. PATIENTS AND METHODS: This case control study was conducted on 40 neonates suffering from sepsis like manifestations recruited from the neonatal intensive care unit of Menoufia university hospital over a period of 6 months. Their blood samples were used for paired analysis of bacterial growth using BACTEC 9050 instrument and real time PCR assay with subsequent DNA sequencing for bacterial species identification...
June 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/27432342/development-of-a-magnetic-separation-method-to-capture-sepsis-associated-bacteria-in-blood
#19
Ana Luisa Kalb Lopes, Josiane Cardoso, Fernanda Roberta Correa Cleto Dos Santos, Ana Claudia Graziani Silva, Maria Isabel Stets, Nilson Ivo Tonin Zanchin, Maurilio José Soares, Marco Aurélio Krieger
Bloodstream infections are important public health problems, associated with high mortality due to the inability to detect the pathogen quickly in the early stages of infection. Such inability has led to a growing interest in the development of a rapid, sensitive, and specific assay to detect these pathogens. In an effort to improve diagnostic efficiency, we present here a magnetic separation method for bacteria that is based on mutated lysozyme (LysE35A) to capture S. aureus from whole blood. LysE35A-coated beads were able to bind different MSSA and MRSA isolates in the blood and also other six Gram-positive and two Gram-negative species in whole blood...
September 2016: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/27397578/bordetella-trematum-sepsis-with-shock-in-a-diabetic-patient-with-rapidly-developing-soft-tissue-infection
#20
Lorrance L Majewski, Masayuki Nogi, Matthew J Bankowski, Heath H Chung
Bordetella is a gram-negative, glucose non-fermenting bacillus, consisting of many host-associated species. B. trematum has previously been identified in wound infections, but rarely known to be a source of bacteremia. Currently, 16S rRNA sequencing represents the reference standard method by which identification is made. Herein, we present a case of fatal B. trematum bacteremia with septic shock. The presumed primary site of the infection was a rapidly developing left leg deep soft tissue infection without necrotizing fasciitis...
September 2016: Diagnostic Microbiology and Infectious Disease
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