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relationship between immunosuppression and infections

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https://www.readbyqxmd.com/read/28194857/hepatitis-e-risks-pigs-or-blood-that-is-the-question
#1
Richard S Tedder, Samreen Ijaz, Alan Kitchen, Ines Ushiro-Lumb, Kate I Tettmar, Patricia Hewitt, Nick Andrews
BACKGROUND: Infection with hepatitis E virus (HEV) Genotype 3 is recognized as a food-borne zoonosis in developed countries where it usually causes a mild self-limited acute hepatitis. It may cause a persistent infection in the immunosuppressed human that can progress to cirrhosis. To protect the patient from transfusion-acquired HEV infection, steps have been taken in the United Kingdom to provide for at-risk patients only components from donors screened for HEV viremia. This strategy does not protect from dietary exposure and calls into question estimation of relative risk between blood transfusion and diet...
February 2017: Transfusion
https://www.readbyqxmd.com/read/28168577/determination-of-anti-anisakis-simplex-antibodies-and-relationship-with-%C3%AE-%C3%AE-and-%C3%AE-%C3%AE-lymphocyte-subpopulations-in-patients-with-crohn-s-disease
#2
C Benet-Campos, C Cuéllar, C García-Ballesteros, V Zamora, R Gil-Borrás, I Catalán-Serra, F López-Chuliá, J C Andreu-Ballester
BACKGROUND: The etiology of Crohn's disease (CD) is still unknown although new theories are based on defects in innate immunity. We have previously shown a decrease in γδ T cells in CD patients. Previous studies have shown a high prevalence of anti-A. simplex immunoglobulins in CD patients. The diminution of γδ T cells in the peripheral blood and intestinal mucosa of CD patients may create a state of immunosuppression that would facilitate A. simplex infection. AIMS: To study the antibody responses to Anisakis antigens in Crohn's disease patients and its relationship with αβ and γδ T cell subsets...
February 6, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28150479/the-intestinal-mycobiota-a-year-of-observation-about-the-incidence-of-yeast-s-isolation-in-fecal-samples
#3
Lucia Barcella, Santa B Rogolino, Angelo P Barbaro
BACKGROUND: Yeast's presence, especially Candida's species, in the intestinal tract is now considered as part of the normal microbial human flora; however, fungal colonization of the colon may induce to fungal infections, becoming a risk not only in immunocompromised patients but also in normalcompetent subjects. The purpose of this epidemiological study was to evaluate the real incidence of yeasts into the fecal samples both from healthy outpatients and from inpatients, except those from wards concerning immunosuppressive and pediatrics pathologies...
February 1, 2017: Minerva Gastroenterologica e Dietologica
https://www.readbyqxmd.com/read/28137252/enhanced-transcriptomic-responses-in-the-pacific-salmon-louse-lepeophtheirus-salmonis-oncorhynchi-to-the-non-native-atlantic-salmon-salmo-salar-suggests-increased-parasite-fitness
#4
Laura M Braden, Ben J G Sutherland, Ben F Koop, Simon R M Jones
BACKGROUND: Outcomes of infections with the salmon louse Lepeophtheirus salmonis vary considerably among its natural hosts (Salmo, Oncorhynchus spp.). Host-parasite interactions range from weak to strong host responses accompanied by high to low parasite abundances, respectively. Parasite behavioral studies indicate that the louse prefers the host Atlantic Salmon (Salmo salar), which is characterized by a weak immune response, and that this results in enhanced parasite reproduction and growth rates...
January 30, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28121912/adult-to-adult-right-lobe-living-donor-liver-transplantation-does-biological-relationship-matter
#5
Wei Zhang, Yifei Tan, Shu Shen, Li Jiang, Lunan Yan, Jiayin Yang, Bo Li, Tianfu Wen, Yong Zeng, WenTao Wang, Mingqing Xu
The influence of the biological relationship between the donor and the recipient is rarely discussed in living donor liver transplantation (LDLT), although it is believed to be an important risk factor in other types of organ transplantations. A total of 272 consecutive patients undergoing adult to adult right lobe LDLT were retrospectively analyzed and stratified into a nonbiologically related (NBR) group (69 patients) and a biologically related (BR) group (203 patients). The preoperative data and postoperative outcomes of both recipients and donors were evaluated...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28057805/cns-targeted-autoimmunity-leads-to-increased-influenza-mortality-in-mice
#6
Justin D Glenn, Matthew D Smith, Pei Xue, Yee Chan-Li, Samuel Collins, Peter A Calabresi, Maureen R Horton, Katharine A Whartenby
The discovery that central nervous system (CNS)-targeted autoreactive T cells required a process of licensing in the lung revealed an unexpected relationship between these organs. The clinical and immunological significance of this finding is bidirectional in that it showed not only a mechanism by which T cells become pathogenic before entering the CNS, but also the potential for this process to influence lung immunity as well. Epidemiological studies have shown that people with multiple sclerosis (MS) suffer from increased morbidity and mortality from infectious diseases, independent of immunosuppressive therapies...
February 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28043583/radiographic-manifestations-of-tuberculosis-in-hiv-positive-patients-correlation-with-cd4-t-cell-count
#7
Mehrdad Bakhshayesh-Karam, Payam Tabarsi, Seyed Mehdi Mirsaiedi, Majid Valiollahpour Amiri, Soheila Zahirifard, Seyed Davood Mansoori, Mohammad Reza Masjedi, Ali Akbar Velayati
BACKGROUND: Observations on Tuberculosis/HIV co-infection in addition to epidemiologic molecular studies have recently provided strong evidence for the state of immune system as the major determinant of the TB imaging spectrum. However, the presence of any correlation between radiographic findings and the degree of immunosuppression in HIV+ patients still remains controversial. The present study aimed to investigate the TB radiographic manifestation in HIV+ patients and its relationship to the CD4 cell count...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27995575/cerebrospinal-fluid-biomarkers-and-hiv-associated-neurocognitive-disorders-in-hiv-infected-individuals-in-rakai-uganda
#8
Mahsa Abassi, Bozena M Morawski, Gertrude Nakigozi, Noeline Nakasujja, Xiangrong Kong, David B Meya, Kevin Robertson, Ronald Gray, Maria J Wawer, Ned Sacktor, David R Boulware
In the USA, increased cerebrospinal fluid (CSF) inflammatory cytokines have been observed in antiretroviral therapy (ART)-naive, HIV-seropositive individuals with HIV-associated neurocognitive disorder (HAND). We characterized the relationship between HAND and CSF biomarker expression in ART-naive, HIV-seropositive individuals in Rakai, Uganda. We analyzed CSF of 78 HIV-seropositive, ART-naive Ugandan adults for 17 cytokines and 20 neurodegenerative biomarkers via Luminex multiplex assay. These adults underwent neurocognitive assessment to determine their degree of HAND...
December 19, 2016: Journal of Neurovirology
https://www.readbyqxmd.com/read/27931680/reactivation-or-reinfection-in-adult-tuberculosis-is-that-the-question
#9
Pere-Joan Cardona
Looking at the chapter on "natural history" in any tuberculosis (TB) reference book, there is a kind of certainty regarding TB in adults. That is the concept of "post-primary" TB described as the reactivation of dormant bacilli hidden in an old lesion developed during infancy due to a type of local immunosuppression. Intriguingly, this concept involves at least two major uncertainties: how can dormant bacilli remain for such a long period, almost a lifetime, in an old lesion, taking into account granuloma dynamism; and what sort of local immunosuppression is the one that facilitates reactivation? The controversy between reactivation and exogenous reinfection as the cause of active TB started very soon in TB research...
December 2016: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/27901200/retrospective-analysis-of-the-clinical-behavior-of-oral-hairy-leukoplakia-in-215-hiv-seropositive-patients
#10
Daniela Assis do Vale, Fabiana Martins E Martins, Paulo Henrique Braz da Silva, Karem López Ortega
Oral manifestations are common findings in human immunodeficiency virus (HIV) infected patients and frequently influence the overall health. Oral hairy leukoplakia (OHL) is strongly associated with HIV infection demonstrating its relationship with the individual's immune status and progression of immunosuppression. This study aims to retrospectively evaluate OHL in HIV patients, analyzing its incidence, demographic aspects and possible changes in clinical and epidemiological profile of the disease over 17 years...
November 28, 2016: Brazilian Oral Research
https://www.readbyqxmd.com/read/27796644/ureaplasma-parvum-causes-hyperammonemia-in-a-pharmacologically-immunocompromised-murine-model
#11
X Wang, K E Greenwood-Quaintance, M J Karau, D R Block, J N Mandrekar, S A Cunningham, J M Mallea, R Patel
A relationship between hyperammonemia and Ureaplasma infection has been shown in lung transplant recipients. We have demonstrated that Ureaplasma urealyticum causes hyperammonemia in a novel immunocompromised murine model. Herein, we determined whether Ureaplasma parvum can do the same. Male C3H mice were given mycophenolate mofetil, tacrolimus, and prednisone for 7 days, and then challenged with U. parvum intratracheally (IT) and/or intraperitoneally (IP), while continuing immunosuppression over 6 days. Plasma ammonia concentrations were determined and compared using Wilcoxon rank-sum tests...
March 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/27795466/the-characteristics-of-extended-spectrum-%C3%AE-lactamases-producing-escherichia-coli-in-hospital-faecal-carriage-in-beijing-tongren-hospital
#12
Maoye Xu, Yanyan Fan, Mei Wang, Xinxin Lu
We aimed to investigate the prevalence of extended-spectrum β-lactamases (ESBL)-producing Escherichia coli (E. coli) in Beijing Tongren hospital and find the relationship between colonization and infection. The clinical data of 650 inpatients included between March 2012 and July 2012 were retrospectively reviewed. The prevalence of ESBL-producing E. coli among inpatients was 25.7% (167/650), with the highest of 50.0% in rheumatology ward and lowest of 10.0% in intensive care unit. Hospital stay more than 2 years, usage of antibiotics less than 3 months, and use of glucocorticoids or immunosuppressive were found to be significantly associated with ESBL carriage (P < 0...
October 31, 2016: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27755153/combination-antiretroviral-therapy-and-cancer-risk
#13
Álvaro H Borges
PURPOSE OF REVIEW: To review the newest research about the effects of combination antiretroviral therapy (cART) on cancer risk. RECENT FINDINGS: HIV+ persons are at increased risk of cancer. As this risk is higher for malignancies driven by viral and bacterial coinfections, classifying malignancies into infection-related and infection-unrelated has been an emerging trend. Cohorts have detected major reductions in the incidence of Kaposi sarcoma and non-Hodgkin lymphoma (NHL) following cART initiation among immunosuppressed HIV+ persons...
January 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/27744057/preliminary-study-on-the-relationship-between-dexamethasone-and%C3%A2-pathogen-susceptibility-on-crucian-carp-carassius-auratus
#14
Xiao-Zhou Qi, Dong-Liang Li, Xiao Tu, Chen-Guang Song, Fei Ling, Gao-Xue Wang
Dexamethasone, a known immunosuppressant, can inhibit the immune response and increase the amount of pathogen in body, but the role of dexamethasone affecting susceptibility of crucian carp (Carassius auratus) to pathogen is unclear. The effects of dexamethasone on susceptibility of crucian carp to Aeromonas hydrophila were investigated in this study. The fish were divided into four groups randomly and injected intraperitoneally by dexamethasone for 0 day (group D), 3 days (group C), 6 days (group B), and 9 days (group A), respectively...
December 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27694721/prevalence-of-cutaneous-warts-in-patients-with-systemic-lupus-erythematosus-a-systematic-review
#15
REVIEW
Luisa Moreira Silva, Willer Goncalves Dourado Santos, Mittermayer Barretto Santiago
The aim of this study was to review and evaluate systematically the scientific evidence on the relationship between systemic lupus erythematosus (SLE) and cutaneous warts (CW) caused by human papillomavirus (HPV) infection. With strict inclusion and exclusion criteria, we extensively searched the PUBMED, BVS (Virtual Health Library), and SCOPUS databases for the studies that evaluated the prevalence of CW in patients with SLE. Secondary references were additionally obtained from the selected articles. Only four articles met the research criteria and showed a higher frequency of CW in SLE patients compared to healthy controls...
September 30, 2016: Journal of Infection in Developing Countries
https://www.readbyqxmd.com/read/27693910/is-the-clinical-relevance-of-drug-food-and-drug-herb-interactions-limited-to-grapefruit-juice-and-saint-john-s-wort
#16
Stéphane Mouly, Célia Lloret-Linares, Pierre-Olivier Sellier, Damien Sene, J-F Bergmann
An interaction of drug with food, herbs, and dietary supplements is usually the consequence of a physical, chemical or physiologic relationship between a drug and a product consumed as food, nutritional supplement or over-the-counter medicinal plant. The current educational review aims at reminding to the prescribing physicians that the most clinically relevant drug-food interactions may not be strictly limited to those with grapefruit juice and with the Saint John's Wort herbal extract and may be responsible for changes in drug plasma concentrations, which in turn decrease efficacy or led to sometimes life-threatening toxicity...
September 28, 2016: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/27690360/exposure-to-corticosterone-affects-host-resistance-but-not-tolerance-to-an-emerging-fungal-pathogen
#17
Julie Murone, Joseph A DeMarchi, Matthew D Venesky
Host responses to pathogens include defenses that reduce infection burden (i.e., resistance) and traits that reduce the fitness consequences of an infection (i.e., tolerance). Resistance and tolerance are affected by an organism's physiological status. Corticosterone ("CORT") is a hormone that is associated with the regulation of many physiological processes, including metabolism and reproduction. Because of its role in the stress response, CORT is also considered the primary vertebrate stress hormone. When secreted at high levels, CORT is generally thought to be immunosuppressive...
2016: PloS One
https://www.readbyqxmd.com/read/27668162/high-level-viruria-as-a-screening-tool-for-bk-virus-nephropathy-in-renal-transplant-recipients
#18
W James Chon, Nidhi Aggarwal, Masha Kocherginsky, Brenna Kane, Jozefa Sutor, Michelle A Josephson
BACKGROUND: Although early monitoring of BK virus infection in renal transplant patients has led to improved outcomes over the past decade, it remains unclear whether monitoring for viremia is the best screening tool for BK virus nephropathy (BKVN). METHODS: We conducted a retrospective review of the medical records of 368 renal transplant recipients who had a minimum of 18 months of posttransplantation follow-up. The relationship between the presence of BK viruria and a composite end point of BK viremia/BKVN was established, and the predictive value of high-grade BK viruria for development of viremia/BKVN was determined...
September 2016: Kidney Research and Clinical Practice
https://www.readbyqxmd.com/read/27548160/inflammatory-cutaneous-diseases-in-renal-transplant-recipients
#19
Paola Savoia, Giovanni Cavaliere, Elisa Zavattaro, Federica Veronese, Paolo Fava
Kidney transplant recipients frequently suffer from skin infections and malignancies, possibly due to the effects of long-term immunosuppressive therapy. While the relationships between immunosuppression and these pathological conditions have been widely investigated, little is known about the relative incidence and characteristics of inflammatory skin diseases in this type of patient. In this study, we analyze the incidence of a number of inflammatory cutaneous diseases in a cohort of patients who underwent kidney transplantation...
August 19, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27527346/testosterone-and-haemosporidian-parasites-along-a-tropical-elevational-gradient-in-rufous-collared-sparrows-zonotrichia-capensis
#20
Camilo Escallón, Nicole M Weinstein, James A Tallant, Winfried Wojtenek, Carlos A Rodríguez-Saltos, Elisa Bonaccorso, Ignacio T Moore
Elevation has been proposed as a dominant ecological variable shaping life history traits and subsequently their underlying hormonal mechanisms. In an earlier meta-analysis of tropical birds, elevation was positively related to testosterone levels. Furthermore, parasitism by avian haemosporidians should vary with elevation as environmental conditions affect vector abundance, and while testosterone is needed for breeding, it is hypothesized to be immunosuppressive and thus could exacerbate haemosporidian infection...
August 16, 2016: Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
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