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Infectious diseases

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113 papers 100 to 500 followers
Peter R Williamson, Joseph N Jarvis, Anil A Panackal, Matthew C Fisher, Síle F Molloy, Angela Loyse, Thomas S Harrison
HIV-associated cryptococcal meningitis is by far the most common cause of adult meningitis in many areas of the world that have high HIV seroprevalence. In most areas in Sub-Saharan Africa, the incidence of cryptococcal meningitis is not decreasing despite availability of antiretroviral therapy, because of issues of adherence and retention in HIV care. In addition, cryptococcal meningitis in HIV-seronegative individuals is a substantial problem: the risk of cryptococcal infection is increased in transplant recipients and other individuals with defects in cell-mediated immunity, and cryptococcosis is also reported in the apparently immunocompetent...
January 2017: Nature Reviews. Neurology
Liliana Maria Sanmarco, Laura Marina Visconti, Natalia Eberhardt, Maria Cecilia Ramello, Nicolás Eric Ponce, Natalia Beatriz Spitale, Maria Lola Vozza, Germán Andrés Bernardi, Susana Gea, Angel Ramón Minguez, Maria Pilar Aoki
Reactive oxygen and nitrogen species are important microbicidal agents and are also involved in lymphocyte unresponsiveness during experimental infections. Many of the biological effects attributed to nitric oxide are mediated by peroxynitrites, which induce the nitration of immune cells, among others. Our group has demonstrated that nitric oxide is involved in the suppressive activity of myeloid-derived suppressor cells in Trypanosoma cruzi-infected mice, with a higher number of CD8+ T cells suffering surface-nitration compared to uninfected controls...
2016: Frontiers in Immunology
Eun Ju Choo, Henry F Chambers
Methicillin-resistant Staphylococcus aureus (MRSA) is a significant cause of health care-associated infections. Vancomycin remains an acceptable treatment option. There has been a welcome increase in the number of agents available for the treatment of MRSA infection. These drugs have certain differentiating attributes and may offer some advantages over vancomycin, but they also have significant limitations. These agents provide some alternative when no other options are available.
December 2016: Infection & Chemotherapy
Shailendra K Saxena, Asif Elahi, Srinivasulu Gadugu, Anil K Prasad
Zika virus (ZIKV) infection is a new emerging threat around the globe which might be responsible for microcephaly and Guillain-Barre syndrome in the infants. Recently, ZIKV outbreak has caused a public health crisis in Brazil after being linked to a sharp increase in birth defects. ZIKV is ssRNA virus belongs to the family Flaviviridae. It is mainly transmitted by mosquito bite specifically Aedes species and disease symptoms include fever, joint pain, muscle pain, rash, conjunctivitis, and headache. The reservoir of ZIKV is still not known...
June 2016: Virusdisease
Andre C Kalil, Mark L Metersky, Michael Klompas, John Muscedere, Daniel A Sweeney, Lucy B Palmer, Lena M Napolitano, Naomi P O'Grady, John G Bartlett, Jordi Carratalà, Ali A El Solh, Santiago Ewig, Paul D Fey, Thomas M File, Marcos I Restrepo, Jason A Roberts, Grant W Waterer, Peggy Cruse, Shandra L Knight, Jan L Brozek
It is important to realize that guidelines cannot always account for individual variation among patients. They are not intended to supplant physician judgment with respect to particular patients or special clinical situations. IDSA considers adherence to these guidelines to be voluntary, with the ultimate determination regarding their application to be made by the physician in the light of each patient's individual circumstances.These guidelines are intended for use by healthcare professionals who care for patients at risk for hospital-acquired pneumonia (HAP) and ventilator-associated pneumonia (VAP), including specialists in infectious diseases, pulmonary diseases, critical care, and surgeons, anesthesiologists, hospitalists, and any clinicians and healthcare providers caring for hospitalized patients with nosocomial pneumonia...
September 1, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
Yasuyuki Kakihana, Takashi Ito, Mayumi Nakahara, Keiji Yamaguchi, Tomotsugu Yasuda
Sepsis is aggravated by an inappropriate immune response to invading microorganisms, which occasionally leads to multiple organ failure. Several lines of evidence suggest that the ventricular myocardium is depressed during sepsis with features of diastolic dysfunction. Potential candidates responsible for septic cardiomyopathy include pathogen-associated molecular patterns (PAMPs), cytokines, and nitric oxide. Extracellular histones and high-mobility group box 1 that function as endogenous damage-associated molecular patterns (DAMPs) also contribute to the myocardial dysfunction associated with sepsis...
2016: Journal of Intensive Care
Jeffrey E Gotts, Michael A Matthay
Sepsis, severe sepsis, and septic shock represent increasingly severe systemic inflammatory responses to infection. Sepsis is common in the aging population, and it disproportionately affects patients with cancer and underlying immunosuppression. In its most severe form, sepsis causes multiple organ dysfunction that can produce a state of chronic critical illness characterized by severe immune dysfunction and catabolism. Much has been learnt about the pathogenesis of sepsis at the molecular, cell, and intact organ level...
May 23, 2016: BMJ: British Medical Journal
Itzhak Brook
Anaerobes are the most predominant components of the normal human skin and mucous membranes bacterial flora, and are a frequent cause of endogenous bacterial infections. Anaerobic infections can occur in all body locations: the central nervous system, oral cavity, head and neck, chest, abdomen, pelvis, skin, and soft tissues. Treatment of anaerobic infection is complicated by their slow growth in culture, by their polymicrobial nature and by their growing resistance to antimicrobials. Antimicrobial therapy is frequently the only form of therapy needed, whereas in others it is an important adjunct to drainage and surgery...
January 2016: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
Trevor G Cooper, Elizabeth Noonan, Sigrid von Eckardstein, Jacques Auger, H W Gordon Baker, Hermann M Behre, Trine B Haugen, Thinus Kruger, Christina Wang, Michael T Mbizvo, Kirsten M Vogelsong
BACKGROUND: Semen quality is taken as a surrogate measure of male fecundity in clinical andrology, male fertility, reproductive toxicology, epidemiology and pregnancy risk assessments. Reference intervals for values of semen parameters from a fertile population could provide data from which prognosis of fertility or diagnosis of infertility can be extrapolated. METHODS: Semen samples from over 4500 men in 14 countries on four continents were obtained from retrospective and prospective analyses on fertile men, men of unknown fertility status and men selected as normozoospermic...
May 2010: Human Reproduction Update
Mohammad Saeid Rezaee-Zavareh, Mohammad Tohidi, Amin Sabouri, Mahdi Ramezani-Binabaj, Mohsen Sadeghi-Ghahrodi, Behzad Einollahi
BACKGROUND: Atherosclerotic event is one of the most causes of death in the world. Coronary artery disease (CAD) is one manifestation of atherosclerosis. It is well-known that several risk factors, such as diabetes mellitus (DM), smoking, hypertension (HTN), have effects on it. It is proposed that infection can lead to atherosclerosis or even make its process faster. Here, we discuss about the effect of some of infectious agents on the atherosclerosis and CAD. METHODS: In this study, first we did a comprehensive search in PubMed, Scopus, and Science Direct using some related keywords such as atherosclerosis, CAD, myocardial infarction (MI), infection, and name of viruses and bacteria...
January 2016: ARYA Atherosclerosis
Wenlei Wang, Jialin Yu, Yu He, Zhengli Wang, Fang Li
Pseudomonas aeruginosa is an opportunistic human pathogen that can cause severe infections in immunocompromised individuals. Because it forms biofilms, which protect against host immune attack and increase resistance to conventional antibiotics, mucoid P. aeruginosa is nearly impossible to eradicate. Moreover, mucoid conversion of P. aeruginosa in cystic fibrosis (CF) patients leads to poor outcomes. This conversion is mainly due to mucA gene mutation, which is thought to be induced by polymorphonuclear leukocytes (PMNs) and the reactive oxygen species they release...
July 2016: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
Jef Hens, Wim Jennes, Luc Kestens
Natural killer (NK) cells specialize in killing virally infected- or tumor cells and are part of the innate immune system. The activational state of NK cells is determined by the balance of incoming activating and inhibitory signals mediated by receptor-ligand binding with the target cell. These receptor-ligand bonds mainly consist of the killer immunoglobulin-like receptors (KIR), which are expressed at the cell surface of NK cells, and their ligands: the highly variable human leukocyte antigen -class I molecules (HLA)...
2016: AIDS Research and Therapy
Camilla Tincati, Daniel C Douek, Giulia Marchetti
Over the past 10 years, extensive work has been carried out in the field of microbial translocation in HIV infection, ranging from studies on its clinical significance to investigations on its pathogenic features. In the present work, we review the most recent findings on this phenomenon, focusing on the predictive role of microbial translocation in HIV-related morbidity and mortality, the mechanisms by which it arises and potential therapeutic approaches. From a clinical perspective, current work has shown that markers of microbial translocation may be useful in predicting clinical events in untreated HIV infection, while conflicting data exist on their role in cART-experienced subjects, possibly due to the inclusion of extremely varied patient populations in cohort studies...
2016: AIDS Research and Therapy
Tomas Cihlar, Marshall Fordyce
Current antiviral treatments can reduce HIV-associated morbidity, prolong survival, and prevent HIV transmission. Combination antiretroviral therapy (cART) containing preferably three active drugs from two or more classes is required for durable virologic suppression. Regimen selection is based on virologic efficacy, potential for adverse effects, pill burden and dosing frequency, drug-drug interaction potential, resistance test results, comorbid conditions, social status, and cost. With prolonged virologic suppression, improved clinical outcomes, and longer survival, patients will be exposed to antiretroviral agents for decades...
June 2016: Current Opinion in Virology
J O Kahn, B D Walker
No abstract text is available yet for this article.
July 2, 1998: New England Journal of Medicine
Lauren E Richey, Jason Halperin
The clinical spectrum of acute human immunodeficiency virus (HIV) infection, a common clinical syndrome, may range from asymptomatic to a severe illness. The purpose of this review is to increase awareness of this syndrome, which is rarely suspected and often missed in clinical care settings, and provide an informative reference for primary care providers. The diagnosis of acute HIV infection is important for both patient care and public health concerns. In this article, the epidemiology, pathophysiology, clinical presentation, diagnosis and treatment of acute HIV infection are reviewed...
February 2013: American Journal of the Medical Sciences
Eric Nou, Janet Lo, Colleen Hadigan, Steven K Grinspoon
Results from several studies have suggested that people with HIV have an increased risk of cardiovascular disease, especially coronary heart disease, compared with people not infected with HIV. People living with HIV have an increased prevalence of traditional cardiovascular disease risk factors, and HIV-specific mechanisms such as immune activation. Although older, more metabolically harmful antiretroviral regimens probably contributed to the risk of cardiovascular disease, new data suggest that early and continuous use of modern regimens, which might have fewer metabolic effects, minimises the risk of myocardial infarction by maintaining viral suppression and decreasing immune activation...
July 2016: Lancet Diabetes & Endocrinology
Enrico Cerrato, Fabrizio D'Ascenzo, Giuseppe Biondi-Zoccai, Andrea Calcagno, Simone Frea, Walter Grosso Marra, Davide Castagno, Pierluigi Omedè, Giorgio Quadri, Filippo Sciuto, Davide Presutti, Giacomo Frati, Stefano Bonora, Claudio Moretti, Fiorenzo Gaita
AIMS: Human immunodeficiency virus infection (HIV) has been associated with cardiac dysfunction that, if present, can negatively affect morbidity and mortality of HIV-infected patients. Unfortunately, many of the studies on this topic were performed before the highly active antiretroviral therapy (HAART) was established. Thus, we performed a comprehensive meta-analysis to critically appraise the incidence of cardiac dysfunction in HIV-infected pauci symptomatic patients. METHODS AND RESULTS: Medline, Cochrane Library, and Biomed Central were systematically screened for studies reporting on systolic and/or diastolic dysfunctions in HIV pauci-symptomatic patients...
May 2013: European Heart Journal
Brian S Moyers, Eric A Secemsky, Eric Vittinghoff, Joseph K Wong, Diane V Havlir, Priscilla Y Hsue, Zian H Tseng
Human immunodeficiency virus (HIV)-infected patients are disproportionately affected by cardiovascular disease and sudden cardiac death (SCD). Whether left ventricular (LV) dysfunction predicts SCD in those with HIV is unknown. We sought to determine the impact of LV dysfunction on SCD in patients with HIV. We previously characterized all SCDs and acquired immunodeficiency syndrome (AIDS) deaths in 2,860 consecutive patients in a public HIV clinic from 2000 to 2009. Transthoracic echocardiograms (TTEs) performed during the study period were identified...
April 1, 2014: American Journal of Cardiology
Patricia P Garcez, Erick Correia Loiola, Rodrigo Madeiro da Costa, Luiza M Higa, Pablo Trindade, Rodrigo Delvecchio, Juliana Minardi Nascimento, Rodrigo Brindeiro, Amilcar Tanuri, Stevens K Rehen
Since the emergence of Zika virus (ZIKV), reports of microcephaly have increased considerably in Brazil; however, causality between the viral epidemic and malformations in fetal brains needs further confirmation. We examined the effects of ZIKV infection in human neural stem cells growing as neurospheres and brain organoids. Using immunocytochemistry and electron microscopy, we showed that ZIKV targets human brain cells, reducing their viability and growth as neurospheres and brain organoids. These results suggest that ZIKV abrogates neurogenesis during human brain development...
May 13, 2016: Science
2016-04-13 18:14:54
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