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https://www.readbyqxmd.com/read/28088124/nipah-virus-transmission-of-a-zoonotic-paramyxovirus
#1
REVIEW
Bronwyn Anne Clayton
Nipah virus is a recently-recognised, zoonotic paramyxovirus that causes severe disease and high fatality rates in people. Outbreaks have occurred in Malaysia, Singapore, India and Bangladesh, and a putative Nipah virus was also recently associated with human disease in the Philippines. Worryingly, human-to-human transmission is common in Bangladesh, where outbreaks occur with near-annual frequency. Onward human transmission of Nipah virus in Bangladesh is associated with close contact with clinically-unwell patients or their infectious secretions...
January 11, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28088123/antibody-dependent-cellular-cytotoxicity-and-influenza-virus
#2
REVIEW
Hillary A Vanderven, Sinthujan Jegaskanda, Adam K Wheatley, Stephen J Kent
Antibodies are a key defence against influenza infection and disease, but neutralizing antibodies are often strain-specific and of limited utility against divergent or pandemic viruses. There is now considerable evidence that influenza-specific antibodies with Fc-mediated effector functions, such as antibody-dependent cellular cytotoxicity (ADCC), can assist in the clearance of influenza infection in vitro and in animal models. Further, ADCC-mediating antibodies that recognize a broad array of influenza strains are common in humans, likely as a result of being regularly exposed to influenza infections...
January 11, 2017: Current Opinion in Virology
https://www.readbyqxmd.com/read/28088084/correlates-of-anti-hepatitis-c-positivity-and-use-of-harm-reduction-services-among-people-who-inject-drugs-in-two-cities-in-croatia
#3
Senad Handanagic, Sandra Sevic, Jelena Barbaric, Zoran Dominkovic, Oktavija Dakovic Rode, Josip Begovac, Ivana Bozicevic
BACKGROUND: We assessed correlates of anti-hepatitis C (anti-HCV) positivity and utilization of needle and syringe exchange programs (NSEP) and opioid agonist treatment (OAT) among people who inject drugs (PWID) in two Croatian cities. METHODS: We conducted a cross-sectional study using respondent-driven (RDS) sampling among PWID in Rijeka (N=255) and Split (N=399). We used RDS-weighted population estimates and multivariable logistic regression to explore correlates of anti-HCV positivity and NSEP and OAT utilization...
December 7, 2016: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28088027/an-alternative-strategy-to-western-blot-as-a-confirmatory-diagnostic-test-for-hiv-infection
#4
Xia Feng, Jibao Wang, Zhiyun Gao, Yu Tian, Ling Zhang, Huichao Chen, Tong Zhang, Lin Xiao, Jun Yao, Wenge Xing, Maofeng Qiu, Yan Jiang
BACKGROUND: In China, western blot (WB) is the recommended procedure for the diagnosis of HIV infection. However, this technique is time consuming and labor intensive, and its complexity restricts wide application in resource-limited regions. OBJECTIVE: The aim of this study was to evaluate the efficacy of a dry blood spots (DBS)-urine paired enzyme-linked immunosorbent assay (ELISA) test, instead of WB, for HIV antibody detection. STUDY DESIGN: Plasma, DBS, and urine samples were collected from 1213 subjects from different populations...
December 21, 2016: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28088017/co-delivery-of-ibuprofen-and-gentamicin-from-nanoporous-anodic-titanium-dioxide-layers
#5
Anna Pawlik, Magdalena Jarosz, Karolina Syrek, Grzegorz D Sulka
Although single-drug therapy may prove insufficient in treating bacterial infections or inflammation after orthopaedic surgeries, complex therapy (using both an antibiotic and an anti-inflammatory drug) is thought to address the problem. Among drug delivery systems (DDSs) with prolonged drug release profiles, nanoporous anodic titanium dioxide (ATO) layers on Ti foil are very promising. In the discussed research, ATO samples were synthesized via a three-step anodization process in an ethylene glycol-based electrolyte with fluoride ions...
January 8, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28087975/screening-and-treating-helicobacter-pylori-infection-for-gastric-cancer-prevention-on-the-population-level
#6
REVIEW
Yi-Chia Lee, Jaw-Town Lin
Helicobacter pylori infection is the major cause of gastric cancer, and removal of H. pylori infection from a population could theoretically decrease the number of cases by about 89%. However, in real-life settings, few studies have reported the effect of screening and treating this pathogen in population-based programs. This is mainly because of the lack of an adequate infrastructure for delivery of systematic screening services to asymptomatic individuals, the lack of standardization to ensure that each subject receives the correct diagnostic testing and antibiotic treatment, and limited resources...
January 14, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28087956/intralesional-injection-of-ok-432-in-cystic-hygroma
#7
M Hazim, S S Moses, I P Tan
BACKGROUND: Lymphangiomas are congenital malformations of the lymphatic system with characteristic dilated endothelium-lined spaces. It is vulnerability to infection or chemical irritants cause spontaneous reduction in size and in some cases complete resolution. Intralesional injection of OK-432 or Picibanil (lyophilized incubation mixture of Group A Streptococcus pyogenes of human origin) is slowly gaining recognition as its safety and efficacy standards have shown to avoid complications resulting from surgical interventions...
December 2016: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/28087953/tenofovir-induced-nephrotoxicity-a-retrospective-cohort-study
#8
H M Koh, K Suresh
BACKGROUND: Tenofovir (TDF) has been associated with renal function deterioration, but local data regarding the incidence and risk factors for this adverse event were lacking. OBJECTIVES: To determine the incidence of nephrotoxicity in HIV-infected patients on tenofovir-based regimens and to evaluate risk factors involved in tenofovir-associated renal function decline. METHODS: This is a single-centre retrospective cohort study of 440 HIV-infected adults who were started on tenofovirbased antiretroviral regimens...
December 2016: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/28087949/the-vaginal-microbiota-and-urinary-tract-infection
#9
Ann E Stapleton
The vagina is a key anatomical site in the pathogenesis of urinary tract infection (UTI) in women, serving as a potential reservoir for infecting bacteria and a site at which interventions may decrease the risk of UTI. The vaginal microbiota is a dynamic and often critical factor in this pathogenic interplay, because changes in the characteristics of the vaginal microbiota resulting in the loss of normally protective Lactobacillus spp. increase the risk of UTI. These alterations may result from the influence of estrogen deficiency, antimicrobial therapy, contraceptives, or other causes...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087948/regulation-of-immunity-to-tuberculosis
#10
Susanna Brighenti, Diane J Ordway
Immunity against Mycobacterium tuberculosis requires a balance between adaptive immune responses to constrain bacterial replication and the prevention of potentially damaging immune activation. Regulatory T (Treg) cells express the transcription factor Foxp3+ and constitute an essential counterbalance of inflammatory Th1 responses and are required to maintain immune homeostasis. The first reports describing the presence of Foxp3-expressing CD4+ Treg cells in tuberculosis (TB) emerged in 2006. Different Treg cell subsets, most likely specialized for different tissues and microenvironments, have been shown to expand in both human TB and animal models of TB...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087946/invasion-of-host-cells-and-tissues-by-uropathogenic-bacteria
#11
Adam J Lewis, Amanda C Richards, Matthew A Mulvey
Within the mammalian urinary tract uropathogenic bacteria face many challenges, including the shearing flow of urine, numerous antibacterial molecules, the bactericidal effects of phagocytes, and a scarcity of nutrients. These problems may be circumvented in part by the ability of uropathogenic Escherichia coli and several other uropathogens to invade the epithelial cells that line the urinary tract. By entering host cells, uropathogens can gain access to additional nutrients and protection from both host defenses and antibiotic treatments...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087945/innate-immune-responses-to-tuberculosis
#12
Jeffrey S Schorey, Larry S Schlesinger
Tuberculosis remains one of the greatest threats to human health. The causative bacterium, Mycobacterium tuberculosis, is acquired by the respiratory route. It is exquisitely adapted to humans and is a prototypic intracellular pathogen of macrophages, with alveolar macrophages being the primary conduit of infection and disease. However, M. tuberculosis bacilli interact with and are affected by several soluble and cellular components of the innate immune system which dictate the outcome of primary infection, most commonly a latently infected healthy human host, in whom the bacteria are held in check by the host immune response within the confines of tissue granuloma, the host histopathologic hallmark...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087940/the-memory-immune-response-to-tuberculosis
#13
Joanna R Kirman, Marcela I Henao-Tamayo, Else Marie Agger
Immunological memory is a central feature of the adaptive immune system and a prerequisite for generating effective vaccines. Understanding long-term memory responses to Mycobacterium tuberculosis will thus provide us with valuable insights that can guide us in the search for a novel vaccine against tuberculosis (TB). For many years, triggering CD4 T cells and, in particular, those secreting interferon-γ has been the goal of most TB vaccine research, and numerous data from animals and humans support the key role of this subset in protective immunity...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087939/dendritic-cells-in-the-immune-system-history-lineages-tissues-tolerance-and-immunity
#14
Jonathan M Austyn
The aim of this review is to provide a coherent framework for understanding dendritic cells (DCs). It has seven sections. The introduction provides an overview of the immune system and essential concepts, particularly for the nonspecialist reader. Next, the "History" section outlines the early evolution of ideas about DCs and highlights some sources of confusion that still exist today. The "Lineages" section then focuses on five different populations of DCs: two subsets of "classical" DCs, plasmacytoid DCs, monocyte-derived DCs, and Langerhans cells...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087938/the-role-and-function-of-fc%C3%AE-receptors-on-myeloid-cells
#15
Stylianos Bournazos, Taia T Wang, Jeffrey V Ravetch
A key determinant for the survival of organisms is their capacity to recognize and respond efficiently to foreign antigens. This is largely accomplished by the orchestrated activity of the innate and adaptive branches of the immune system. Antibodies are specifically generated in response to foreign antigens, facilitating thereby the specific recognition of antigens of almost infinite diversity. Receptors specific for the Fc domain of antibodies, Fc receptors, are expressed on the surface of the various myeloid leukocyte populations and mediate the binding and recognition of antibodies by innate leukocytes...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087937/myeloid-cell-phenotypes-in-susceptibility-and-resistance-to-helminth-parasite-infections
#16
Rick M Maizels, James P Hewitson
Many major tropical diseases are caused by long-lived helminth parasites that are able to survive by modulation of the host immune system, including the innate compartment of myeloid cells. In particular, dendritic cells and macrophages show markedly altered phenotypes during parasite infections. In addition, many specialized subsets such as eosinophils and basophils expand dramatically in response to these pathogens. The changes in phenotype and function, and their effects on both immunity to infection and reactivity to bystander antigens such as allergens, are discussed...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087935/diagnosis-treatment-and-prevention-of-urinary-tract-infection
#17
Paula Pietrucha-Dilanchian, Thomas M Hooton
UTI may involve the lower or upper urinary tract and may be uncomplicated or complicated. The emphasis of this chapter is uncomplicated UTI. The diagnosis of uncomplicated cystitis (bladder infection) and pyelonephritis (kidney infection) is usually easily made based on the clinical presentation, whereas the diagnosis in patients with complicated UTI is often more complex. Thus uncomplicated cystitis is usually manifested by dysuria, frequency and/or urgency without fever, and pyelonephritis is usually manifested by fever and back pain/costovertebral angle tenderness...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087928/factors-associated-with-non-completion-of-follow-up-33-month-latent-tuberculous-infection-treatment-trial
#18
R N Moro, T R Sterling, J Saukkonen, A Vernon, C R Horsburgh, R E Chaisson, C D Hamilton, M E Villarino, S Goldberg
<h2>SETTING:</h2><p>A post-hoc exploratory analysis of a randomized, open-label clinical trial thatenrolled 8053 participants from the United States, Canada, Brazil, and Spain.</p><h2>OBJECTIVE:</h2><p>To assess factors associated with non-completion of study follow-up (NCF) in a 33-month latent tuberculous infection treatment trial, PREVENT TB.</p><h2>DESIGN:</h2><p>Participants were randomized to receive 3 months of weekly directly observed therapy vs...
January 13, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28087927/genome-wide-approaches-to-defining-macrophage-identity-and-function
#19
Gregory J Fonseca, Jason S Seidman, Christopher K Glass
Macrophages play essential roles in the response to injury and infection and contribute to the development and/or homeostasis of the various tissues they reside in. Conversely, macrophages also influence the pathogenesis of metabolic, neurodegenerative, and neoplastic diseases. Mechanisms that contribute to the phenotypic diversity of macrophages in health and disease remain poorly understood. Here we review the recent application of genome-wide approaches to characterize the transcriptomes and epigenetic landscapes of tissue-resident macrophages...
October 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087926/urinary-tract-infections-in-infants-and-children
#20
Theresa A Schlager
Urinary tract infections (UTI) are one of the most common infections in children and symptoms may be nonspecific. The risk of renal scarring is highest in children under 1 year of age with febrile UTI and high-grade vesicoureteral reflux (VUR). Although treatment of UTI is usually straightforward, given increased rates of antimicrobial resistance worldwide, the choice of treatment for pediatric UTI should be guided by community resistance patterns whenever feasible. The benefit of antimicrobial prophylaxis after first UTI and/or in the presence of VUR remains controversial, but a recent meta-analysis supports continuous antimicrobial prophylaxis in children with VUR, indicating a need for more research in this area...
October 2016: Microbiology Spectrum
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