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Toxic shock syndrome

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https://www.readbyqxmd.com/read/29350159/clinical-and-molecular-epidemiology-of-staphylococcal-toxic-shock-syndrome-in-the-united-kingdom
#1
Hema Sharma, Debra Smith, Claire E Turner, Laurence Game, Bruno Pichon, Russell Hope, Robert Hill, Angela Kearns, Shiranee Sriskandan
Staphylococcal toxic shock syndrome (TSS) was originally described in menstruating women and linked to TSS toxin 1 (TSST-1)-producing Staphylococcus aureus. Using UK national surveillance data, we ascertained clinical, molecular and superantigenic characteristics of TSS cases. Average annual TSS incidence was 0.07/100,000 population. Patients with nonmenstrual TSS were younger than those with menstrual TSS but had the same mortality rate. Children <16 years of age accounted for 39% of TSS cases, most caused by burns and skin and soft tissue infections...
February 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29335257/staphylococcal-superantigens-use-lama2-as-a-coreceptor-to-activate-t-cells
#2
Zhigang Li, Joseph J Zeppa, Mark A Hancock, John K McCormick, Terence M Doherty, Geoffrey N Hendy, Joaquín Madrenas
Canonical Ag-dependent TCR signaling relies on activation of the src-family tyrosine kinase LCK. However, staphylococcal superantigens can trigger TCR signaling by activating an alternative pathway that is independent of LCK and utilizes a Gα11-containing G protein-coupled receptor (GPCR) leading to PLCβ activation. The molecules linking the superantigen to GPCR signaling are unknown. Using the ligand-receptor capture technology LRC-TriCEPS, we identified LAMA2, the α2 subunit of the extracellular matrix protein laminin, as the coreceptor for staphylococcal superantigens...
January 15, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29308782/septic-miscarriage-with-toxic-shock-syndrome-and-disseminated-intravascular-coagulation-dic-the-role-of-surgery-recombinant-activated-factor-vii-and-intravenous-immunoglobulin-ivig
#3
L N Tan, G Mariappa, H Y Voon, H Suharjono
Severe sepsis with multi-organ failure is associated with a high mortality rate. This case report highlights the challenges and modalities available in the management of a lady with refractory shock and disseminated intravascular coagulation (DIC) due to toxic shock syndrome (TSS) from genital tract sepsis. Early surgical intervention to remove the source of infection, the use of recombinant activated factor VII to treat intractable disseminated intravascular coagulation and intravenous immunoglobulin to neutralise the circulating exotoxins, have been employed and shown to drastically improve outcomes...
December 2017: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/29284248/streptococcus-suis-a-re-emerging-pathogen-associated-with-occupational-exposure-to-pigs-or-pork-products-part-i-epidemiology
#4
Jacek Dutkiewicz, Jacek Sroka, Violetta Zając, Bernard Wasiński, Ewa Cisak, Anna Sawczyn, Anna Kloc, Angelina Wójcik-Fatla
<i>Streptococcus suis</i> (ex Elliot 1966, Kilpper-Bälz & Schleifer 1987) is a facultatively anaerobic Gram-positive ovoid or coccal bacterium surrounded by a polysaccharide capsule. Based on the antigenic diversity of the capsule, <i>S. suis</i> strains are classified serologically into 35 serotypes. <i>Streptococcus suis</i> is a commensal of pigs, commonly colonizing their tonsils and nasal cavities, mostly in weaning piglets between 4-10 weeks of age. This species occurs also in cattle and other mammals, in birds and in humans...
December 23, 2017: Annals of Agricultural and Environmental Medicine: AAEM
https://www.readbyqxmd.com/read/29278528/treatment-of-severe-skin-and-soft-tissue-infections-a-review
#5
Jason P Burnham, Marin H Kollef
PURPOSE OF REVIEW: To review the salient features of the management of severe skin and soft tissue infections (SSTIs), including toxic shock syndrome, myonecrosis/gas gangrene, and necrotizing fasciitis. RECENT FINDINGS: For severe SSTIs, intensive care, source control, and broad-spectrum antimicrobials are required for the initial phase of illness. There is an increasing focus on the utility of rapid diagnostic tests to help in selection and de-escalation of antimicrobials for SSTIs...
December 22, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/29247497/the-prevalence-of-antibody-responses-against-staphylococcus-aureus-antigens-in-patients-with-atopic-dermatitis-a-systematic-review-and-meta-analysis
#6
REVIEW
J de Wit, J E E Totté, F J M van Buchem, S G M A Pasmans
Staphylococcus (S.) aureus plays a role in the pathogenesis of atopic dermatitis (AD), possibly via the expression of various virulence antigens. An altered antibody response towards these antigens might contribute to inflammation. We aimed to provide an overview of the varying prevalences and odds of antibody responses against S. aureus antigens in AD patients. Data were systematically obtained from Embase, Medline, Web of Science, Scopus, Cochrane, PubMed and Google Scholar (up to February 12th 2016). We selected all original observational and experimental studies assessing anti-staphylococcal antibodies in serum of AD patients...
December 16, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/29237775/induction-of-immunosuppressive-cd8-cd25-foxp3-regulatory-t-cells-by-suboptimal-stimulation-with-staphylococcal-enterotoxin-c1
#7
Juyeun Lee, Nogi Park, Joo Youn Park, Barbara L F Kaplan, Stephen B Pruett, Juw Won Park, Yong Ho Park, Keun Seok Seo
Superantigens (SAgs) produced by Staphylococcus aureus at high concentrations induce proliferation of T cells bearing specific TCR Vβ sequences and massive cytokinemia that cause toxic shock syndrome. However, the biological relevance of SAgs produced at very low concentrations during asymptomatic colonization or chronic infections is not understood. In this study, we demonstrate that suboptimal stimulation of human PBMCs with a low concentration (1 ng/ml) of staphylococcal enterotoxin C1, at which half-maximal T cell proliferation was observed, induced CD8+CD25+ T cells expressing markers related to regulatory T cells (Tregs), such as IFN-γ, IL-10, TGF-β, FOXP3, CD28, CTLA4, TNFR2, CD45RO, and HLA-DR...
December 13, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29229737/the-superantigen-toxic-shock-syndrome-toxin-1-alters-human-aortic-endothelial-cell-function
#8
Katarina Kulhankova, Kyle J Kinney, Jessica M Stach, Françoise A Gourronc, Isabella M Grumbach, Aloysius J Klingelhutz, Wilmara Salgado-Pabón
Staphylococcus aureus infective endocarditis (IE) is a fast-progressing and tissue destructive infection of the cardiac endothelium. The superantigens (SAgs) toxic shock syndrome toxin-1 (TSST-1), staphylococcal enterotoxin C (SEC), and the enterotoxin gene cluster (egc) play a novel and essential role in the etiology of S. aureus IE. Recent studies indicate that SAgs act at the infection site to cause tissue pathology and promote vegetation growth. The underlying mechanism of SAg involvement has not been clearly defined...
December 11, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/29158081/streptococcus-pyogenes-nuclease-a-spna-mediated-virulence-does-not-exclusively-depend-on-nuclease-activity
#9
Callum Chalmers, Adrina Hema J Khemlani, Chae Ryeong Sohn, Jacelyn Mei San Loh, Catherine Jia-Yun Tsai, Thomas Proft
BACKGROUND: Streptococcus pyogenes, or Group A Streptococcus (GAS), is a human pathogen that causes a wide range of diseases, including pharyngitis, necrotizing fasciitis and toxic shock syndrome. The bacterium produces a large arsenal of virulence factors, including the cell wall-anchored Streptococcus pyogenes nuclease A (SpnA), which facilitates immune evasion by degrading the DNA backbone of neutrophil extracellular traps. SpnA consists of a C-terminal endo/exonuclease domain and a N-terminal domain of unknown function...
November 13, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/29146177/clostridium-difficile-and-clostridium-sordellii-toxins-proinflammatory-versus-anti-inflammatory-response
#10
Michel R Popoff
Clostridium difficile and Clostridium sordellii produce related potent toxins (C. difficile toxin A (TcdA) and toxin B (TcdB), C. sordellii lethal toxin (TcsL) and hemorrhagic toxin (TcsH)) which belong to the large clostridial glucosylating toxin (LCGT) family. TcsL is the main C. sordellii toxin as most of toxigenic C. sordellii strains only synthesize this toxin. Intestinal colonization by C. difficile subsequently to unbalanced microbiota is accompanied by release of toxins which induce local tissue destruction and severe inflammatory response...
November 13, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/29142545/rapid-screening-of-pyogenic-staphylococcus-aureus-for-confirmation-of-genus-and-species-methicillin-resistance-and-virulence-factors-by-using-two-novel-multiplex-pcr
#11
Abdul Haque, Asma Haque, Muhammad Saeed, Aysha Azhar, Samreen Rasool, Sidra Shan, Beenish Ehsan, Zohaib Nisar
Objectives: Emergence of methicillin resistant Staphylococcus aureus (MRSA) is a major medical problem of current era. These bacteria are resistant to most drugs and rapid diagnosis can provide a clear guideline to clinicians. They possess specific virulence factors and relevant information can be very useful. We designed this study to develop multiplex PCRs to provide rapid information. Methods: We studied 60 Staphylococcus aureus isolates and detected methicillin resistance by cefoxitin sensitivity and targeting of mecA gene...
September 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29124121/patients-comorbidities-reduce-the-clinical-value-of-emergency-colonoscopy-results-of-a-retrospective-cohort-study
#12
Cristiano Cremone, Anouk Esch, Charlotte Gagniere, Alessandro Fugazza, Faria Mesli, Michael Levy, Aurelien Amiot, Alexis Laurent, Yann LeBaleur, Francois Hemery, Nicolas De'Angelis, Francesco Brunetti, Iradj Sobhani
Background and study aims:  Urgent endoscopy is often used to diagnose and sometimes treat acute upper gastrointestinal syndromes (hemorrhage, toxic ingestion, and occlusion). However, its suitability concerning the management of lower gastrointestinal conditions in emergency circumstances is controversial. Patients and methods:  We studied the role of emergency colonoscopy in diagnosis and treatment of all consecutive patients presenting with acute lower gastrointestinal symptoms referred to our hospital on an emergency basis...
November 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/29112091/macro-and-microvascular-parameters-following-toxic-shock-syndrome
#13
Katherine Yh Chen, Ling-Jun Li, Tien Y Wong, Carol Y Cheung, Nigel Curtis, Michael Cheung, David P Burgner
Whether individuals who had toxic shock syndrome (TSS) in childhood have differences in macro- and retinal microvascular parameters indicative of increased cardiovascular risk is unknown. We found no evidence of adverse macrovascular changes in 22 TSS participants compared to 60 control participants. Microvascular comparisons showed a reduction in retinal total fractal dimension which has been associated with cardiovascular risk factors in children.
November 3, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/29109702/genomic-comparison-among-lethal-invasive-strains-of-streptococcus-pyogenes-serotype-m1
#14
Gabriel R Fernandes, Aulus E A D Barbosa, Renan N Almeida, Fabíola F Dos S Castro, Marina de C P da Ponte, Celio Faria-Junior, Fernanda M P Müller, Antônio A B Viana, Dario Grattapaglia, Octavio L Franco, Sérgio A Alencar, Simoni C Dias
Streptococcus pyogenes, also known as group A Streptococcus (GAS), is a human pathogen that causes diverse human diseases including streptococcal toxic shock syndrome (STSS). A GAS outbreak occurred in Brasilia, Brazil, during the second half of the year 2011, causing 26 deaths. Whole genome sequencing was performed using Illumina platform. The sequences were assembled and genes were predicted for comparative analysis with emm type 1 strains: MGAS5005 and M1 GAS. Genomics comparison revealed one of the invasive strains that differ from others isolates and from emm 1 reference genomes...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29108905/-maternal-deaths-due-to-infectious-cause-results-from-the-french-confidential-enquiry-into-maternal-deaths-2010-2012
#15
A Rigouzzo, V Tessier, L Zieleskiewicz
Over the period 2010-2012, maternal mortality from infectious causes accounted for 5% of maternal deaths by direct causes and 16% of maternal deaths by indirect causes. Among the 22 deaths caused by infection occurred during this period, 6 deaths were attributed to direct causes from genital tract origin, confirming thus the decrease in direct maternal deaths by infection during the last ten years. On the contrary, indirect maternal deaths by infection, from extragenital origin, doubled during the same period, with 16 deaths in the last triennium, dominated by winter respiratory infections, particularly influenza: the 2009-2010 influenza A (H1N1) virus pandemic was the leading cause of indirect maternal mortality by infection during the studied period...
November 3, 2017: Gynecologie, Obstetrique, Fertilite & Senologie
https://www.readbyqxmd.com/read/29107650/molecular-characterization-and-antibiotic-resistance-of-streptococcus-dysgalactiae-subspecies-equisimilis-isolated-from-patients-with-streptococcal-toxic-shock-syndrome
#16
T Ikebe, R Okuno, M Sasaki, Y Kanda, H Otsuka, R Kawahara, H Ohya, M Suzuki, K Uchida, H Nihonmatsu, M Ohnishi
Streptococcal toxic shock syndrome (STSS) is a severe invasive infection characterized by the sudden onset of shock, multiorgan failure, and high mortality. Although STSS is mainly caused by Streptococcus pyogenes, group G streptococcus identified as S. dysgalactiae subsp. equisimilis (SDSE) causing STSS has also been reported; however, no study has analyzed >100 isolates of SDSE causing STSS. Therefore, we characterized the emm genotype of 173 SDSE isolates obtained from STSS patients in Japan during 2014-2016 and performed antimicrobial susceptibility testing using the broth microdilution method and emm gene typing...
October 26, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29097247/emerging-group-c-and-group-g-streptococcal-endocarditis-a-canadian-perspective
#17
Sylvain A Lother, Davinder S Jassal, Philippe Lagacé-Wiens, Yoav Keynan
OBJECTIVES: The aim of this study was to determine the incidence of infective endocarditis (IE) in patients with bacteremia caused by group C and group G streptococci (GCGS) and to characterize the burden of disease, clinical characteristics, and outcomes through a case series of patients with GCGS IE. METHODS: Individuals with blood cultures growing GCGS in Manitoba, Canada, between January 2012 and December 2015 were included. Clinical and echocardiographic parameters were collected retrospectively...
October 31, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29092737/oxalate-nephropathy-following-vitamin-c-intake-within-intensive-care-unit%C3%A2
#18
Eloïse Colliou, Arnaud Mari, Audrey Delas, Antoine Delarche, Stanislas Faguer
OBJECTIVE: To report a case of acute oxalate nephropathy related to vitamin C intake within the intensive care unit (ICU). DESIGN: Case report. SETTING: ICU and nephrology department of a French university hospital. PATIENT: A 57-year-old woman with septic shock related to <italic>Legionella pneumophila</italic> pneumonia complicated by acute respiratory distress syndrome and acute kidney injury who required renal replacement therapy for 75 days...
December 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/29081854/toxic-shock-in-children-with-bone-and-joint-infections-a-review-of-seven-years-of-patients-admitted-to-one-intensive-care-unit
#19
D L Kerr, E K Loraas, A C Links, T V Brogan, G A Schmale
PURPOSE: The objective of this study was to compare the frequency of severe systemic, multi-organ involvement and toxic shock syndrome (TSS) in patients with Staphylococcus aureus (SA) and Group A β-haemolytic Streptococcus pyogenes (GABS) bone and joint infections. METHODS: We retrospectively reviewed patients treated for septic arthritis or osteomyelitis at one children's hospital between 2002 and 2009. The rates of intensive care unit (ICU) admission for methicillin-sensitive SA (MSSA), methicillin-resistant SA (MRSA) and GABS infections were compared, as were the lengths of stay, number of surgeries, operative procedures and cases of TSS...
October 1, 2017: Journal of Children's Orthopaedics
https://www.readbyqxmd.com/read/29079067/clinical-mimics-an-emergency-medicine-focused-review-of-cellulitis-mimics
#20
Garrett Blumberg, Brit Long, Alex Koyfman
BACKGROUND: Cellulitis is a common clinical condition with low rates of morbidity and mortality if treated appropriately. Mimics of cellulitis presenting with erythema, edema, warmth, and pain can be associated with grave morbidity and mortality if misdiagnosed. OBJECTIVE: This review investigates the signs and symptoms of cellulitis, mimics of cellulitis, and an approach to the management of both cellulitis and its mimics. DISCUSSION: The current emergency medicine definition of cellulitis includes erythema, induration, warmth, and swelling...
October 2017: Journal of Emergency Medicine
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