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invasive pulmonary aspergillosis

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https://www.readbyqxmd.com/read/28634301/microbial-glycoside-hydrolases-as-antibiofilm-agents-with-cross-kingdom-activity
#1
Brendan D Snarr, Perrin Baker, Natalie C Bamford, Yukiko Sato, Hong Liu, Mélanie Lehoux, Fabrice N Gravelat, Hanna Ostapska, Shane R Baistrocchi, Robert P Cerone, Elan E Filler, Matthew R Parsek, Scott G Filler, P Lynne Howell, Donald C Sheppard
Galactosaminogalactan and Pel are cationic heteropolysaccharides produced by the opportunistic pathogens Aspergillus fumigatus and Pseudomonas aeruginosa, respectively. These exopolysaccharides both contain 1,4-linked N-acetyl-d-galactosamine and play an important role in biofilm formation by these organisms. Proteins containing glycoside hydrolase domains have recently been identified within the biosynthetic pathway of each exopolysaccharide. Recombinant hydrolase domains from these proteins (Sph3h from A...
June 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28631658/a-case-of-aspergillus-tracheobronchitis-in-a-patient-with-chronic-obstructive-pulmonary-disease
#2
Ming-Li Yuan, Gang Yang, Hong-Ling Hu, Wen Yin, Wei-Jun Tan, Su Zhao
Aspergillus tracheobronchitis (AT) is a unique form of invasive pulmonary aspergillosis, which is commonly found in patients with impaired immunity. Early-stage AT presents in a nonspecific way, both clinically and radiographically, thereby delaying diagnosis and resulting in a high mortality. Owing to impaired mucociliary clearance, previous nonfungal infections, and administration of corticosteroids, among other aspects, patients with chronic obstructive pulmonary disease (COPD) are predisposed to AT, although they are mostly immunocompetent...
April 2017: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/28626542/invasive-aspergillosis-with-disseminated-skin-involvement-in-a-patient-with-acute-myeloid-leukemia-a-rare-case
#3
Duygu Mert, Gülşen Iskender, Fazilet Duygu, Alparslan Merdin, Sinan Dal Mehmet, Mehmet Dogan, Emre Tekgündüz, Mustafa Ertek, Fevzi Altuntaş
Invasive pulmonary aspergillosis is most commonly seen in immunocompromised patients. Besides, skin lesions may also develop due to invasive aspergillosis in those patients. A 49-year-old male patient was diagnosed with acute myeloid leukemia. The patient developed bullous and zosteriform lesions on the skin after the 21st day of hospitalization. The skin biopsy showed hyphae. Disseminated skin aspergillosis was diagnosed to the patient. Voricanazole treatment was initiated. The patient was discharged once the lesions started to disappear...
June 1, 2017: Hematology Reports
https://www.readbyqxmd.com/read/28601021/aspergillus-fumigatus-induced-early-inflammatory-response-in-pulmonary-microvascular-endothelial-cells-role-of-p38-mapk-and-inhibition-by-silibinin
#4
Jun Song, Weihua Pan, Yue Sun, Jing Han, Weimin Shi, Wanqing Liao
Human invasive pulmonary aspergillosis (IPA) is a serious infectious disease mainly caused by Aspergillus fumigatus (A. fumigatus). Pulmonary microvascular endothelial cells (PMVECs) are important ones in the human lung tissue. However, it remains unclear about the role of PMVECs in IPA. In the present study, we cocultured PMVECs with A. fumigatus. We observed that A. fumigatus induced dose- and time-dependent increases of interleukin 6 (IL-6), interleukin 1β (IL-1β) and intercellular adhesion molecule 1 (ICAM-1) concentration in the cultures...
June 7, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28595486/special-considerations-for-the-diagnosis-and-treatment-of-invasive-pulmonary-aspergillosis
#5
Matthew William McCarthy, Thomas J Walsh
The diagnosis and treatment of invasive pulmonary aspergillosis (IPA) are ongoing challenges in clinical practice. While important advances have recently been made, including enhanced diagnostic modalities as well as novel therapeutic and prophylactic options, more effective options are urgently needed as the population of immunocompromised patients continues to expand. Areas covered: In this paper, we review novel approaches to diagnosis of IPA, including multiplex PCR, Matrix Assisted Laser Desorption/Ionization-Time of Flight Mass Spectrometry and provide a detailed review of the extended-spectrum triazole isavuconazole, which was approved in 2015 to treat IPA...
June 21, 2017: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/28594271/treatment-of-cyclosporin-a-retains-host-defense-against-invasive-pulmonary-aspergillosis-in-a-non-immunosuppressive-murine-model-by-preserving-the-myeloid-cell-population
#6
Sarah Sze Wah Wong, Orhan Rasid, Paris Laskaris, Arnaud Fekkar, Jean-Marc Cavaillon, William J Steinbach, Oumaima Ibrahim-Granet
Cyclosporin A (CsA) is widely used as an immunosuppressive agent for organ transplant recipients. CsA inhibits calcineurin, which is highly conserved in mammals and fungi, and thus affects both types of organism. In mammals, the immunosuppressive effect of CsA is via hampering T cell activation. In fungi, the growth inhibitory effect of CsA is via interference with hyphal growth. The aim of this study was to determine whether CsA renders mice susceptible to invasive pulmonary aspergillosis (IPA) and whether it can protect immunosuppressed mice from infection...
June 8, 2017: Virulence
https://www.readbyqxmd.com/read/28584997/cd4-t-cells-mediate-aspergillosis-vaccine-protection
#7
Diana Diaz-Arevalo, Markus Kalkum
Adaptive effector CD4(+) T cells play essential roles in the defense against fungal infections, especially against invasive aspergillosis (IA). Such protective CD4(+) T cells can be generated through immunization with specialized antifungal vaccines, as has been demonstrated for pulmonary Aspergillus fumigatus infections in mouse experiments. Adaptive transfer of fungal antigen-specific CD4(+) T cells conferred protection onto non-immunized naive mice, an experimental approach that could potentially become a future treatment option for immunosuppressed IA patients, focusing on the ultimate goal to improve their otherwise dim chances for survival...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28584996/endpoint-assessment-in-rabbit-models-of-invasive-pulmonary-aspergillosis-and-mucormycosis
#8
Vidmantas Petraitis, Ruta Petraitiene, William W Hope, Thomas J Walsh
Multiple animal models have been developed to study the pathogenesis of invasive pulmonary aspergillosis, as well as to evaluate the efficacy, pharmacokinetics, and pharmacodynamics of various antifungal agents and vaccines. Each model is beneficial depending on the questions that are asked. In this chapter, we will discuss the endpoints assessment of the persistently neutropenic rabbit models of invasive pulmonary aspergillosis and invasive pulmonary mucormycosis.
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28566368/caspofungin-increases-fungal-chitin-and-eosinophil-and-%C3%AE-%C3%AE-t-cell-dependent-pathology-in-invasive-aspergillosis
#9
Nansalmaa Amarsaikhan, Ethan M Sands, Anand Shah, Ali Abdolrasouli, Anna Reed, James E Slaven, Darius Armstrong-James, Steven P Templeton
The polysaccharide-rich fungal cell wall provides pathogen-specific targets for antifungal therapy and distinct molecular patterns that stimulate protective or detrimental host immunity. The echinocandin antifungal caspofungin inhibits synthesis of cell wall β-1,3-glucan and is used for prophylactic therapy in immune-suppressed individuals. However, breakthrough infections with fungal pathogen Aspergillus fumigatus are associated with caspofungin prophylaxis. In this study, we report in vitro and in vivo increases in fungal surface chitin in A...
May 31, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28560131/fatal-invasive-aspergillosis-caused-by-aspergillus-niger-after-bilateral-lung-transplantation
#10
Enora Atchade, Sylvain Jean-Baptiste, Sandrine Houzé, Claire Chabut, Laurent Massias, Yves Castier, Olivier Brugière, Hervé Mal, Philippe Montravers
Aspergillus niger is usually considered to be a low virulence fungus, not commonly reported to cause invasive infections. Invasive pulmonary aspergillosis due to Aspergillus niger was diagnosed in a 43-year-old woman following bilateral lung transplantation. Intravenous voriconazole failed to control progression of the disease. Despite salvage therapy with a combination of voriconazole and caspofungin for 23 days, the patient developed massive hemoptysis leading to death. The authors report the clinical features and treatment of this case...
September 2017: Medical Mycology Case Reports
https://www.readbyqxmd.com/read/28545901/management-of-aspergillus-pleural-empyema-with-combined-systemic-and-intrapleural-antifungal-therapy-in-a-pediatric-patient-case-report
#11
Alanoud Almuhareb, Zakaria Habib
We present the case of an 8-year-old immunocompromised boy with invasive pulmonary aspergillosis, complicated with pleural empyema and disseminated to the bone and central nervous system (CNS). The patient was treated with combined systemic antifungal agents (voriconazole and caspofungin) and intrapleural instillation of liposomal amphotericin B, in addition to surgical intervention. The treatment was well tolerated and resulted in remarkable clinical and radiological pulmonary improvement.
May 22, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28545828/effectiveness-of-environmental-control-measures-to%C3%A2-decrease-the-risk-of-invasive-aspergillosis-in-acute-leukaemia-patients-during-hospital-building-work
#12
J F Combariza, L F Toro, J J Orozco
BACKGROUND: Invasive aspergillosis (IA) is a significant problem in acute leukaemia patients. Construction work near hospital wards caring for immunocompromised patients is one of the main risk factors for developing invasive pulmonary aspergillosis (IPA). AIM: To assess the impact of environmental control measures used during hospital construction for the prevention of IA in acute leukaemia patients. METHODS: A retrospective cohort study was developed to evaluate the IA incidence in acute leukaemia patients with different environmental control measures employed during hospital construction...
May 5, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28539863/pulmonary-aspergillosis-as-opportunistic-mycoses-in-a-cohort-of-human-immunodeficiency-virus-infected-patients-report-from-a-tertiary-care-hospital-in-north-india
#13
Ravinder Kaur, Bhanu Mehra, Megh Singh Dhakad, Ritu Goyal, Richa Dewan
OBJECTIVE: The incidence of pulmonary aspergillosis in human immunodeficiency virus (HIV)-infected persons is rising. This study was designed to determine the prevalence of pulmonary aspergillosis in a cohort of HIV-positive patients (n = 71) presenting with lower respiratory tract infection at a tertiary care medical center in India. METHODS: Sputum samples were collected, and potassium hydroxide mount, cultural characteristics, and lactophenol cotton blue preparations were employed to aid in the identification of Aspergillus species...
April 2017: International Journal of Health Sciences
https://www.readbyqxmd.com/read/28525576/profiling-of-volatile-organic-compounds-produced-by-clinical-aspergillus-isolates-using-gas-chromatography-mass-spectrometry
#14
M G Gerritsen, P Brinkman, N Escobar, L D Bos, K de Heer, M Meijer, H-G Janssen, H de Cock, H A B Wösten, C E Visser, M H J van Oers, P J Sterk
Volatile organic compounds (VOCs) in exhaled breath may identify the presence of invasive pulmonary aspergillosis. We aimed to detect VOC profiles emitted by in vitro cultured, clinical Aspergillus isolates using gas chromatography-mass spectrometry (GC-MS). Three clinical Aspergillus isolates and a reference strain were cultured while conidiation was prevented. Headspace samples were analyzed using a standardized method. Breath samples of patients from which the cultures were obtained were checked for the presence of the VOCs found in vitro...
May 18, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28516246/aspergillus-species-in-bronchiectasis-challenges-in-the-cystic-fibrosis-and-non-cystic-fibrosis-airways
#15
REVIEW
Sanjay H Chotirmall, Maria Teresa Martin-Gomez
Bronchiectasis is a chronic irreversible airway abnormality associated with infectious agents that either cause or superinfect the airways. While the role of bacteria is well studied, much remains to be determined about fungi in both cystic fibrosis- and non-cystic fibrosis-related bronchiectasis. The airway is constantly exposed to inhaled ambient moulds of which Aspergillus represent the most ubiquitous. In a normal healthy host, this situation is of little consequence. The presence of anatomical or immunological abnormalities such as those in bronchiectasis leads to a range of fungal-related pathologies from asymptomatic airway colonization to fungal sensitization, allergic bronchopulmonary aspergillosis or chronic pulmonary aspergillosis...
May 17, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28487045/pentraxin-3-levels-in-bronchoalveolar-lavage-fluid-of-lung-transplant-recipients-with-invasive-aspergillosis
#16
Dima Kabbani, Archana Bhaskaran, Lianne G Singer, Alyajahan Bhimji, Coleman Rotstein, Shaf Keshavjee, W Conrad Liles, Shahid Husain
BACKGROUND: Invasive aspergillosis is the most common invasive fungal infection in lung transplant recipients. The use of galactomannan testing in bronchoalveolar lavage (BAL) fluid has improved diagnosis of invasive aspergillosis; however, false-positive results can lead to overdiagnosis and unnecessary treatment. The use of proinflammatory markers such as pentraxin 3 (PTX3) may help differentiate between Aspergillus colonization and disease. METHODS: BAL PTX3 concentrations were measured by enzyme-linked immunosorbent assay in 151 lung transplant recipients and 9 healthy control subjects...
April 19, 2017: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/28485322/role-of-triggering-receptor-expressed-on-myeloid-cell-1-expression-in-mammalian-target-of-rapamycin-modulation-of-cd8-t-cell-differentiation-during-the-immune-response-to-invasive-pulmonary-aspergillosis
#17
Na Cui, Hao Wang, Long-Xiang Su, Jia-Hui Zhang, Yun Long, Da-Wei Liu
BACKGROUND: Triggering receptor expressed on myeloid cell-1 (TREM-1) may play a vital role in mammalian target of rapamycin (mTOR) modulation of CD8+ T-cell differentiation through the transcription factors T-box expressed in T-cells and eomesodermin during the immune response to invasive pulmonary aspergillosis (IPA). This study aimed to investigate whether the mTOR signaling pathway modulates the proliferation and differentiation of CD8+ T-cells during the immune response to IPA and the role TREM-1 plays in this process...
May 20, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28482726/the-predictive-value-of-aspergillus-pcr-testing-on-bronchoalveolar-lavage-fluid-for-early-diagnosis-of-invasive-pulmonary-aspergillosis-in-hematologic-patients
#18
Francesco Marchesi, Antonio Spadea, Fulvia Pimpinelli, Grazia Prignano, Maria Grazia Paglia, Daniele Forcella, Svitlana Gumenyuk, Daniela Renzi, Francesca Palombi, Antonella Vulcano, Francesco Pisani, Atelda Romano, Elena Papa, Francesco Facciolo, Fabrizio Ensoli, Corrado Girmenia, Andrea Mengarelli
No abstract text is available yet for this article.
May 9, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28480161/multiple-cavities-with-halo-sign-in-a-case-of-invasive-pulmonary-aspergillosis-during-therapy-for-drug-induced-hypersensitivity-syndrome
#19
Tomoo Ikari, Katsura Nagai, Masashi Ohe, Toshiyuki Harada, Yasushi Akiyama
A 67-year-old female with rheumatoid arthritis and asthma-chronic obstructive pulmonary disease overlap syndrome was admitted for drug-induced hypersensitivity syndrome (DIHS) caused by salazosulfapyridine. Human herpes virus 6 (HHV-6) variant B was strongly positive on peripheral blood. Multiple cavities with ground grass opacities rapidly emerged predominantly in the upper and middle lobes. She was diagnosed with invasive pulmonary aspergillosis (IPA), and was treated successfully with antifungal agents. Therapeutic systemic corticosteroids, emphysematous change in the lungs, and the worsening of the patient's general condition due to DIHS were considered major contributing factor leading to IPA...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28446576/diagnostic-value-of-the-galactomannan-antigen-test-in-serum-and-bronchoalveolar-lavage-fluid-samples-from-patients-with-non-neutropenic-invasive-pulmonary-aspergillosis
#20
Wei Zhou, Hongxing Li, Yan Zhang, Mei Huang, Qian He, Pei Li, Fang Zhang, Yi Shi, Xin Su
Objective: To compare the diagnostic value of galactomannan (GM) detection in bronchoalveolar lavage fluid (BALF) and serum samples from non-neutropenic patients with invasive pulmonary aspergillosis (IPA), and determine the optimal BALF GM cut-off value for pulmonary aspergillosis.Methods: GM detection in BALF and serum samples was performed by enzyme-linked immunosorbent assay (ELISA) in 128 patients with clinically suspected non-neutropenic pulmonary aspergillosis between June 2014 and June 2016. On the basis of the clinical and pathological diagnoses, 8 patients were excluded because their diagnosis was uncertain...
April 26, 2017: Journal of Clinical Microbiology
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