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Fungal invasive infection

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https://www.readbyqxmd.com/read/28922285/what-where-and-why-exploring-fluorodeoxyglucose-pet-s-ability-to-localise-and-differentiate-infection-from-cancer
#1
Abby Douglas, Eddie Lau, Karin Thursky, Monica Slavin
PURPOSE OF REVIEW: To review the utility of FDG-PET imaging in detecting the cause of fever and infection in patients with cancer. RECENT FINDINGS: FDG-PET has been shown to have high sensitivity and accuracy for causes of neutropenic fever, leading to higher diagnostic certainty in this group. Recent advances in pathogen-specific labelling in PET to identify Aspergillus spp. and Yersinia spp. infections in mice, as well as differentiating between Gram-positive, Gram-negative and mycobacterial infections are promising...
September 15, 2017: Current Opinion in Infectious Diseases
https://www.readbyqxmd.com/read/28919893/ripk3-fas-associated-death-domain-axis-regulates-pulmonary-immunopathology-to-cryptococcal-infection-independent-of-necroptosis
#2
Zhenzong Fa, Qun Xie, Wei Fang, Haibing Zhang, Haiwei Zhang, Jintao Xu, Weihua Pan, Jinhua Xu, Michal A Olszewski, Xiaoming Deng, Wanqing Liao
Fas-associated death domain (FADD) and receptor interacting protein kinase 3 (RIPK3) are multifunctional regulators of cell death and immune response. Using a mouse model of cryptococcal infection, the roles of FADD and RIPK3 in anti-cryptococcal defense were investigated. Deletion of RIPK3 alone led to increased inflammatory cytokine production in the Cryptococcus neoformans-infected lungs, but in combination with FADD deletion, it led to a robust Th1-biased response with M1-biased macrophage activation. Rather than being protective, these responses led to paradoxical C...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28919789/antifungal-resistance-current-trends-and-future-strategies-to-combat
#3
REVIEW
Nathan P Wiederhold
Antifungal resistance represents a major clinical challenge to clinicians responsible for treating invasive fungal infections due to the limited arsenal of systemically available antifungal agents. In addition current drugs may be limited by drug-drug interactions and serious adverse effects/toxicities that prevent their prolonged use or dosage escalation. Fluconazole resistance is of particular concern in non-Candida albicans species due to the increased incidence of infections caused by these species in different geographic locations worldwide and the elevated prevalence of resistance to this commonly used azole in many institutions...
2017: Infection and Drug Resistance
https://www.readbyqxmd.com/read/28919347/invasive-mold-infections-of-the-central-nervous-system-in-patients-with-hematologic-cancer-or-stem-cell-transplantation-2000-2016-uncommon-with-improved-survival-but-still-deadly-often
#4
Minas P Economides, Leomar Y Ballester, Vinodh A Kumar, Ying Jiang, Jeffrey Tarrand, Victor Prieto, Harrys A Torres, Dimitrios P Kontoyiannis
BACKGROUND: Historically considered to have very poor outcome, there is paucity of recent data regarding invasive mold infections (IMIs) of the central nervous system (CNS) in patients with hematologic cancer (HC) or stem cell transplantation (SCT). METHODS: We reviewed the records of HC patients and/or SCT recipients who were diagnosed with CNS IMIs (EORTC/MSG criteria) at MD Anderson Cancer Center (1/1/2000-6/31/2016). Risk factors for survival at day (d) 42 post diagnosis were assessed...
September 14, 2017: Journal of Infection
https://www.readbyqxmd.com/read/28915910/colonization-of-the-bovine-uterus-by-candida-kefyr
#5
Cecilia Christensen Karstrup, Bent Aalbæk, Kirstine Klitgaard, Tim Kåre Jensen, Hanne Gervi Pedersen, Jørgen Steen Agerholm
BACKGROUND: While fungal infections of the bovine uterus are well-known diseases in pregnant cattle, very limited knowledge exists on the presence and significance of fungi in the uterus of non-pregnant cows. Presence of fungi in the uterine lumen of postpartum (pp) cows has been reported, but little attention has been paid to this as most studies of the bovine pp uterus have focused on bacteria. CASE PRESENTATION: Microscopy of uterine lavage cytology slides of three cows from one herd revealed the presence of numerous yeast-like organisms, which were located either free in the fluid or within macrophages...
September 16, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28911045/azole-resistant-aspergillosis-epidemiology-molecular-mechanisms-and-treatment
#6
Anuradha Chowdhary, Cheshta Sharma, Jacques F Meis
Aspergillus fumigatus remains the most common species in all pulmonary syndromes, followed by Aspergillus flavus which is a common cause of allergic rhinosinusitis, postoperative aspergillosis and fungal keratitis. The manifestations of Aspergillus infections include invasive aspergillosis, chronic pulmonary aspergillosis and bronchitis. Allergic manifestations of inhaled Aspergillus include allergic bronchopulmonary aspergillosis and severe asthma with fungal sensitization. Triazoles are the mainstay of therapy against Aspergillus infections for treatment and prophylaxis...
August 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28911042/novel-agents-and-drug-targets-to-meet-the-challenges-of-resistant-fungi
#7
Matthew W McCarthy, Dimitrios P Kontoyiannis, Oliver A Cornely, John R Perfect, Thomas J Walsh
The emergence of drug-resistant fungi poses a major threat to human health. Despite advances in preventive, diagnostic, and therapeutic interventions, resistant fungal infections continue to cause significant morbidity and mortality in patients with compromised immunity, underscoring the urgent need for new antifungal agents. In this article, we review the challenges associated with identifying broad-spectrum antifungal drugs and highlight novel targets that could enhance the armamentarium of agents available to treat drug-resistant invasive fungal infections...
August 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28911041/culture-independent-molecular-methods-for-detection-of-antifungal-resistance-mechanisms-and-fungal-identification
#8
David S Perlin, Nathan P Wiederhold
Resistance to azoles and echinocandins has emerged as a significant factor affecting the clinical management of patients with invasive fungal infections. Immunosuppressed patients at high risk for invasive fungal infections often have prolonged or repeated exposure to antifungals resulting in either the well-documented selection of naturally occurring, less susceptible fungal species, or the in situ development of specific resistance mechanisms. Nucleic acid-based molecular diagnostics are particularly well suited for the rapid detection of low-abundance fungal pathogens and identification of the infecting pathogen to the genus and species levels, as well as assessment of resistance mechanisms...
August 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28911040/future-research-priorities-in-fungal-resistance
#9
Matthew W McCarthy, David W Denning, Thomas J Walsh
Improved understanding of basic mycological, pharmacological, and immunological processes has led to important advances in the diagnosis and treatment of invasive fungal infections. However, the rise of fungi that are resistant to existing antifungal agents poses a substantial threat to human health. Addressing this expanding problem is an urgent priority for the international research community. In this article, we highlight important diagnostic and therapeutic advances that address the rise of resistant fungi as well as new public health initiatives that warrant further investigation to help curb the spread of these potentially lethal organisms...
August 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28906086/new-formulation-for-topical-treatment-of-onychomycoses
#10
Elisa M Difonzo, Federica Scarfì, Massimiliano Galeone
BACKGROUND: In order to treat onychomycosis, topical and systemic medications are available. The choice of a systemic or topic treatment depends on numerous factors, such as patient's age, the presence of comorbidity, responsible fungal species, the clinical form of onychomycosis, its location (fingernails or toenails), the number of nails affected and the percentage of the nail plate infected. As for topical medications, given that nail plate has an insufficiently permeable structure, it is necessary to use appropriate formulae that create in the surface of the nail plate a film able, in turn, to function both as an active ingredient's deposit and moisturising agent in nail's superficial layers in order to facilitate the spread of the active ingredient...
October 2017: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/28904437/cryptococcal-infection-in-transplant-kidney-manifesting-as-chronic-allograft-dysfunction
#11
C Agrawal, V Sood, A Kumar, V Raghavan
Invasive fungal infections (IFIs) are a significant cause of morbidity in solid organ transplant (SOT) recipients. Common causes among them are Aspergillus, Candida, and Cryptococcus. Antifungal prophylaxis has led to decrease in overall incidence of IFI; however, there is very little decline in the incidence of Cryptococcal infections of SOT recipients because effective prophylaxis is not available against this infectious agent. Spectrum of manifestation of Cryptococcal infection varies in immunocompetent and immunocompromised host with subclinical and self-limiting with lungs being the primary site in immunocompetent and central nervous system as the most common site in an immunocompromised host...
September 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/28895709/recombinant-tissue-plasminogen-activator-treatment-for-intracardiac-vegetation-in-a-very-low-birth-weight-infant
#12
Abdurrahman A Ozdemir
Developing treatment options have resulted in prolonged admission and increased bacterial and fungal nosocomial infections as well as improved survival in neonatal intensive care unit. Invasive fungal infections in newborns are associated with significant morbidity and mortality and can cause endorgan dissemination such as endocarditis, endophthalmitis, septic arthritis, obstructive nephropathy and meningitis. Endocarditis requires aggressive systemic antifungal therapy and sometimes surgical intervention in neonates...
October 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28894638/is-there-genetic-variation-in-mycorrhization-of-medicago-truncatula
#13
Dorothée Dreher, Heena Yadav, Sindy Zander, Bettina Hause
Differences in the plant's response among ecotypes or accessions are often used to identify molecular markers for the respective process. In order to analyze genetic diversity of Medicago truncatula in respect to interaction with the arbuscular mycorrhizal (AM) fungus Rhizophagus irregularis, mycorrhizal colonization was evaluated in 32 lines of the nested core collection representing the genetic diversity of the SARDI collection. All studied lines and the reference line Jemalong A17 were inoculated with R...
2017: PeerJ
https://www.readbyqxmd.com/read/28890395/the-antifungal-arsenal-alternative-drugs-and-future-targets
#14
Nathan P Wiederhold
Clinically available antifungals for the treatment of invasive fungal infections primarily target either ergosterol in the fungal cell membrane or 1,3-β-D-glucan in the fungal cell wall. These classes include the polyene amphotericin B, the triazoles, and the echinocandins. Although newer antifungals and improved formulations of others have advanced our ability to treat patients with invasive mycoses, these drugs are often limited by toxicities, drug interactions, and the need for intravenous administration...
September 7, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28888066/the-interactions-between-gut-microbiota-and-entomopathogenic-fungi-a-potential-approach-for-biological-control-of-blattella-germanica-l
#15
Fan Zhang, Xiao X Sun, Xian C Zhang, Shuo Zhang, Jie Lu, Yong M Xia, Yan H Huang, Xue J Wang
BACKGROUND: Metarhizium anisopliae and Beauveria bassiana mainly infect insects through the cuticle; gut infection occasionally occurs. Microorganisms existing in the gut may play a crucial role in the evolution and ecology of host defenses to fungal pathogens. To evaluate whether the gut bacteria participate in antifungal activity, and to determine their role in host protection, the interactions between gut bacteria and M. anisopliae and the diversity of gut microbiota in cockroaches were studied...
September 9, 2017: Pest Management Science
https://www.readbyqxmd.com/read/28887897/opportunistic-invasive-cutaneous-fungal-infections-associated-with-administration-of-cyclosporine-to-dogs-with-immune-mediated-disease
#16
B B McAtee, K J Cummings, A K Cook, J A Lidbury, J C Heseltine, M D Willard
BACKGROUND: Opportunistic invasive fungal infections (OIFIs) occur in dogs administered immunosuppressive medications. However, the epidemiology of OIFIs among dogs undergoing immunosuppressive treatment is poorly understood. The aims of this study were to (1) estimate the incidence of OIFIs among dogs diagnosed with certain immune-mediated diseases and treated with immunosuppressive drugs, and (2) determine if administration of particular drug(s) was a risk factor for OIFIs. HYPOTHESIS: Dogs receiving cyclosporine treatment (alone or as part of a multidrug protocol) are at higher risk of developing OIFIs...
September 9, 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28887808/comparison-of-reference-values-for-immune-recovery-between-event-free-patients-receiving-haploidentical-allografts-and-those-receiving-human-leukocyte-antigen-matched-sibling-donor-allografts
#17
Xuying Pei, Xiangyu Zhao, Yu Wang, Lanping Xu, Xiaohui Zhang, Kaiyan Liu, Yingjun Chang, Xiaojun Huang
To establish optimal reference values for recovered immune cell subsets, we prospectively investigated post-transplant immune reconstitution (IR) in 144 patients who received allogeneic stem cell transplantation (allo- SCT) and without showing any of the following events: poor graft function, grades II‒IV acute graft-versus-host disease (GVHD), serious chronic GVHD, serious bacterial infection, invasive fungal infection, or relapse or death in the first year after transplantation. IR was rapid in monocytes, intermediate in lymphocytes, CD3(+) Tcells, CD8(+) T cells, and CD19(+) B cells, and very slow in CD4(+) T cells in the entire patient cohort...
September 8, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28887465/host-immune-status-specific-production-of-gliotoxin-and-bis-methyl-gliotoxin-during-invasive-aspergillosis-in-mice
#18
Janyce A Sugui, Stacey R Rose, Glenn Nardone, Muthulekha Swamydas, Chyi-Chia R Lee, Kyung J Kwon-Chung, Michail S Lionakis
Delayed diagnosis in invasive aspergillosis (IA) contributes to its high mortality. Gliotoxin (GT) and bis-methyl-gliotoxin (bmGT) are secondary metabolites produced by Aspergillus during invasive, hyphal growth and may prove diagnostically useful. Because IA pathophysiology and GT's role in virulence vary depending on the underlying host immune status, we hypothesized that GT and bmGT production in vivo may differ in three mouse models of IA that mimic human disease. We defined temporal kinetics of GT and bmGT in serum, bronchoalveolar lavage fluid (BALF) and lungs of A...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28882009/update-on-the-diagnosis-of-invasive-fungal-infection
#19
REVIEW
E Ibáñez-Martínez, A Ruiz-Gaitán, J Pemán-García
The number of patients at risk of suffering invasive fungal infection (IFI) is increasing. Because of its high mortality, new rapid and accurate diagnostic tools are needed. Last advances in invasive candidiasis diagnosis comprise Peptide Nucleic Acid Fluorescent In-Situ Hybridization (PNA-FISH), direct MALDI-TOF or multiplex acid nucleic testing. While all of them rely in positive blood cultures, T2Candida uses PCR coupled with T2Magnetic resonance detection directly in whole blood, allowing detection of 1-3 UFC/mL of Candida in about four hours...
September 2017: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/28880742/decreased-levels-of-th17-cells-are-associated-with-invasion-fungal-infections-after-allogeneic-hematopoietic-stem-cell-transplantation
#20
Ling Wang, Peng Zhao, Chunlei Shi, Ying Li, Ketao Lan, Mingzhe Han
BACKGROUND: Delayed immune reconstitution is an important risk factor for increased susceptibility to fungal pathogens. However, little is known about the association between the recovery of CD4(+)T cell subsets and invasion fungal infections (IFIs) in patients after allogeneic hematopoietic stem cell transplantation (allo-HSCT). The aim of the study was to analyze the immune reconstitution characteristics of CD4(+)T cell subsets and their association with the incidence of IFIs over the first 3 months after allo-HSCT...
September 7, 2017: Hematology (Amsterdam, Netherlands)
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