Thoracic Aspergillosis (Part I)
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Coccidioides Immitis
24/08/2017 FUNGAL AGENTS CAUSING INFECTION OF THE LUNG Microbiology Lectures of the Respiratory Diseases Prepared by: Rizalinda Sjahril Microbiology Department Faculty of Medicine Hasanuddin University 2016 OVERVIEW OF CLINICAL MYCOLOGY . Among 150.000 fungi species only 100-150 are human pathogens 25 spp most common pathogens . Majority are saprophyticLiving on dead or decayed organic matter . Transmission Person to person (rare) SPORE INHALATION OR ENTERS THE TISSUE FROM TRAUMA Animal to person (rare) – usually in dermatophytosis 1 24/08/2017 OVERVIEW OF CLINICAL MYCOLOGY . Human is usually resistant to infection, unless: Immunoscompromised (HIV, DM) Serious underlying disease Corticosteroid/antimetabolite treatment . Predisposing factors: Long term intravenous cannulation Complex surgical procedures Prolonged/excessive antibacterial therapy OVERVIEW OF CLINICAL MYCOLOGY . Several fungi can cause a variety of infections: clinical manifestation and severity varies. True pathogens -- have the ability to cause infection in otherwise healthy individuals 2 24/08/2017 Opportunistic/deep mycoses which affect the respiratory system are: Cryptococcosis Aspergillosis Zygomycosis True pathogens are: Blastomycosis Seldom severe Treatment not required unless extensive tissue Coccidioidomycosis destruction compromising respiratory status Histoplasmosis Or extrapulmonary fungal dissemination Paracoccidioidomycosis COMMON PATHOGENS OBTAINED FROM SPECIMENS OF PATIENTS WITH RESPIRATORY DISEASE Fungi Common site of Mode of Infectious Clinical -
Review of Oxepine-Pyrimidinone-Ketopiperazine Type Nonribosomal Peptides
H OH metabolites OH Review Review of Oxepine-Pyrimidinone-Ketopiperazine Type Nonribosomal Peptides Yaojie Guo , Jens C. Frisvad and Thomas O. Larsen * Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Building 221, DK-2800 Kgs. Lyngby, Denmark; [email protected] (Y.G.); [email protected] (J.C.F.) * Correspondence: [email protected]; Tel.: +45-4525-2632 Received: 12 May 2020; Accepted: 8 June 2020; Published: 15 June 2020 Abstract: Recently, a rare class of nonribosomal peptides (NRPs) bearing a unique Oxepine-Pyrimidinone-Ketopiperazine (OPK) scaffold has been exclusively isolated from fungal sources. Based on the number of rings and conjugation systems on the backbone, it can be further categorized into three types A, B, and C. These compounds have been applied to various bioassays, and some have exhibited promising bioactivities like antifungal activity against phytopathogenic fungi and transcriptional activation on liver X receptor α. This review summarizes all the research related to natural OPK NRPs, including their biological sources, chemical structures, bioassays, as well as proposed biosynthetic mechanisms from 1988 to March 2020. The taxonomy of the fungal sources and chirality-related issues of these products are also discussed. Keywords: oxepine; nonribosomal peptides; bioactivity; biosynthesis; fungi; Aspergillus 1. Introduction Nonribosomal peptides (NRPs), mostly found in bacteria and fungi, are a class of peptidyl secondary metabolites biosynthesized by large modularly organized multienzyme complexes named nonribosomal peptide synthetases (NRPSs) [1]. These products are amongst the most structurally diverse secondary metabolites in nature; they exhibit a broad range of activities, which have been exploited in treatments such as the immunosuppressant cyclosporine A and the antibiotic daptomycin [2,3]. -
Turning on Virulence: Mechanisms That Underpin the Morphologic Transition and Pathogenicity of Blastomyces
Virulence ISSN: 2150-5594 (Print) 2150-5608 (Online) Journal homepage: http://www.tandfonline.com/loi/kvir20 Turning on Virulence: Mechanisms that underpin the Morphologic Transition and Pathogenicity of Blastomyces Joseph A. McBride, Gregory M. Gauthier & Bruce S. Klein To cite this article: Joseph A. McBride, Gregory M. Gauthier & Bruce S. Klein (2018): Turning on Virulence: Mechanisms that underpin the Morphologic Transition and Pathogenicity of Blastomyces, Virulence, DOI: 10.1080/21505594.2018.1449506 To link to this article: https://doi.org/10.1080/21505594.2018.1449506 © 2018 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group© Joseph A. McBride, Gregory M. Gauthier and Bruce S. Klein Accepted author version posted online: 13 Mar 2018. Submit your article to this journal Article views: 15 View related articles View Crossmark data Full Terms & Conditions of access and use can be found at http://www.tandfonline.com/action/journalInformation?journalCode=kvir20 Publisher: Taylor & Francis Journal: Virulence DOI: https://doi.org/10.1080/21505594.2018.1449506 Turning on Virulence: Mechanisms that underpin the Morphologic Transition and Pathogenicity of Blastomyces Joseph A. McBride, MDa,b,d, Gregory M. Gauthier, MDa,d, and Bruce S. Klein, MDa,b,c a Division of Infectious Disease, Department of Medicine, University of Wisconsin School of Medicine and Public Health, 600 Highland Avenue, Madison, WI 53792, USA; b Division of Infectious Disease, Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, 1675 Highland Avenue, Madison, WI 53792, USA; c Department of Medical Microbiology and Immunology, University of Wisconsin School of Medicine and Public Health, 1550 Linden Drive, Madison, WI 53706, USA. -
Fungal Infection in the Lung
CHAPTER Fungal Infection in the Lung 52 Udas Chandra Ghosh, Kaushik Hazra INTRODUCTION The following risk factors may predispose to develop Pneumonia is the leading infectious cause of death in fungal infections in the lungs 6 1, 2 developed countries . Though the fungal cause of 1. Acute leukemia or lymphoma during myeloablative pneumonia occupies a minor portion in the immune- chemotherapy competent patients, but it causes a major role in immune- deficient populations. 2. Bone marrow or peripheral blood stem cell transplantation Fungi may colonize body sites without producing disease or they may be a true pathogen, generating a broad variety 3. Solid organ transplantation on immunosuppressive of clinical syndromes. treatment Fungal infections of the lung are less common than 4. Prolonged corticosteroid therapy bacterial and viral infections and very difficult for 5. Acquired immunodeficiency syndrome diagnosis and treatment purposes. Their virulence varies from causing no symptoms to death. Out of more than 1 6. Prolonged neutropenia from various causes lakh species only few fungi cause human infection and 7. Congenital immune deficiency syndromes the most vulnerable organs are skin and lungs3, 4. 8. Postsplenectomy state RISK FACTORS 9. Genetic predisposition Workers or farmers with heavy exposure to bird, bat, or rodent droppings or other animal excreta in endemic EPIDEMIOLOGY OF FUNGAL PNEUMONIA areas are predisposed to any of the endemic fungal The incidences of invasive fungal infections have pneumonias, such as histoplasmosis, in which the increased during recent decades, largely because of the environmental exposure to avian or bat feces encourages increasing size of the population at risk. This population the growth of the organism. -
Mucormycosis of the Central Nervous System
Journal of Fungi Review Mucormycosis of the Central Nervous System 1 1,2, , 3, , Amanda Chikley , Ronen Ben-Ami * y and Dimitrios P Kontoyiannis * y 1 Infectious Diseases Unit, Tel Aviv Sourasky Medical Center, Tel Aviv 64239, Israel 2 Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 64239, Israel 3 Department of Infectious Diseases, The University of Texas, M.D. Anderson Cancer Center, Houston, TX 77030, USA * Correspondence: [email protected] (R.B.-A.); [email protected] (D.P.K.) These authors contribute equally to this paper. y Received: 6 June 2019; Accepted: 7 July 2019; Published: 8 July 2019 Abstract: Mucormycosis involves the central nervous system by direct extension from infected paranasal sinuses or hematogenous dissemination from the lungs. Incidence rates of this rare disease seem to be rising, with a shift from the rhino-orbital-cerebral syndrome typical of patients with diabetes mellitus and ketoacidosis, to disseminated disease in patients with hematological malignancies. We present our current understanding of the pathobiology, clinical features, and diagnostic and treatment strategies of cerebral mucormycosis. Despite advances in imaging and the availability of novel drugs, cerebral mucormycosis continues to be associated with high rates of death and disability. Emerging molecular diagnostics, advances in experimental systems and the establishment of large patient registries are key components of ongoing efforts to provide a timely diagnosis and effective treatment to patients with cerebral mucormycosis. Keywords: central nervous system; mucormycosis; Mucorales; zygomycosis 1. Introduction Mucormycosis is the second most frequent invasive mold disease after aspergillosis [1–3], with rising incidence reported in some countries [4–7]. -
Fungal Infections – an Overview
REVIEW Fungal infections – An overview Natalie Schellack, BCur, BPharm, PhD(Pharmacy); Jade du Toit, BPharm; Tumelo Mokoena, BPharm; Elmien Bronkhorst, BPharm, MSc(Med) School of Pharmacy, Faculty of Health Sciences, Sefako Makgatho Health Sciences University Correspondence to: Prof Natalie Schellack, [email protected] Abstract Fungi normally originate from the environment that surrounds us, and appear to be harmless until inhaled or ingestion of spores occurs. A pathogenic fungus may lead to infection. People who are at risk of acquiring fungal infection are those living with human immunodeficiency virus (HIV), cancer, receiving immunosuppressant therapy, neonates and those of advanced age. The management of superficial fungal infections is mainly topical, with agents including terbinafine, miconazole and ketoconazole. Oral treatment includes griseofulvin and fluconazole. Invasive fungal infections are difficult to treat, and are managed with agents including the azoles, echinocandins and amphotericin B. This paper provides a general overview of the management of fungus infections. © Medpharm S Afr Pharm J 2019;86(1):33-40 Introduction more advanced biochemical or molecular testing.4 Fungi normally originate from the environment that surrounds Superficial fungal infections us, and appear to be harmless until inhaled or ingestion of spores Either yeasts or fungi can cause dermatomycosis, or superficial occurs. Infection with fungi is also more likely when the body’s fungal infections.7 Fungi that infect the hair, skin, nails and mucosa immune system becomes weakened. A pathogenic fungus may lead to infection. The number of fungus species ranges in the can cause a superficial fungal infection. Dermatophytes are found millions and only a few species seem to be harmful to humans; the naturally in soil, human skin and keratin-containing structures, 3 ones found mostly on the mucous membrane and the skin have which provide them with a source of nutrition. -
Cryptococcosis in Cats
12 Cryptococcosis in cats FACT SHEET What is cryptococcosis? ! Atypical forms are characterized by one or more skin nodules that are not ! Cryptococcosis is the most common systemic fungal disease in cats worldwide. painful but may be firm or fluctuant. Solitary nodules are suggestive of direct inoculation. ! It is caused by the C. neoformans-C. gattii species complex which can also infect o Multiple nodules are suggestive of haematogenous spread from the primary humans, domestic and wild mammals and birds. o site of infection. ! C. neoformans is considered an opportunistic pathogen in human urban ! populations, whereas C. gattii is a true pathogen, more prevalent in rural areas. Haematogenous dissemination may lead to meningoencephalomyelitis, uveitis, chorioretinitis, osteomyelitis, polyarthritis, systemic lymphadenitis and multi- ! Cryptococcosis is a rare non-contagious fungal disease, acquired from a organ involvement. contaminated environment. ! CNS involvement may occur following local dissemination through the cribriform plate, causing sudden blindness, seizures and/or behavioural changes. ! Apathy and cachexia appear in chronic cases with systemic dissemination. Pathogenesis ! Cryptococcus is mainly an airborne pathogen, and basidiospores, which develop in the environment, penetrate the cat’s respiratory system and induce primary Diagnosis infection. ! Cutaneous inoculation or spread from the respiratory to the central nervous ! Cytology: samples stained with Romanowsky-type stains demonstrate pink to system (CNS) is also possible. violet, round or budding yeasts that vary in size (4-15 microns) and shape. They are typically surrounded by a clear, more or less thick halo corresponding to the ! The yeast cell survives inside phagocytic cells such as macrophages, dendritic unstained capsule. cells, and neutrophils, replicating both extracellularly and intracellularly. -
Aspergillomas in the Lung Cavities
ASPERGILLOMAS IN THE LUNG CAVITIES Eastern Journal of Medicine 3 (1): 7-9, 1998. Aspergillomas in the lung cavities SAKARYA M.E.1, ÖZBAY B.2, YALÇINKAYA İ.3, ARSLAN H.1, UZUN K.2, POYRAZ N.1 Departments of Radiology1and Chest Diseases2,Chest Surgery3 School of Medicine, Yüzüncü Yıl University, Van Objective Pulmonary aspergilloma usually arise from All patients showed cavitary lesions due to healed colonization of aspergillus in preexisting lung cavities. tuberculosis except one. Hemoptisis was the most In this study, we aimed to evaluate computed common complaint. Six patients underwent tomograpy (CT) findings in patients with pulmonary thoracotomy. One patient developed empyema after the aspergilloma. operation. Method We have reviewed 9 patients with aspergilloma, Conclusion CT of the chest in the patients with who referred to the hospital between 1991 and 1996, on aspergilloma is an important diagnostic tool in the their tomographic findings. diagnosis of pulmonary aspergilloma. Results The most common involvement site was upper Key words Pulmonary aspergilloma, computed lobe, which suggested the etiology of tuberculosis. tomography. strongly suggested by a positive precipitin test. CT Introduction clearly demonstrated pulmonary aspergilloma The first description of aspergillosis in man was findings. made by Bennett in 1842. The term aspergilloma was first used by Dave almost a century later to describe a Results discrete lesion that classically colonizes the cavities The most common underlying disease was healed of healed pulmonary tuberculosis and other fibrotic pulmonary tuberculosis. The CT appearance in all lung diseases (1). Pulmonary involvement with was consistent with a diagnosis of aspergilloma. Aspergillus fumigatus is varied and largely dependent In two patients with aspergilloma (22%) the on the patient’s underlying pulmonary and immune lesions were bilateral; in two patients, there were status. -
Isolation of Mucorales from Biological Environment and Identification of Rhizopus Among the Isolates Using PCR- RFLP
Journal of Shahrekord University of Medical Sciences doi:10.34172/jsums.2019.17 2019;21(2):98-103 http://j.skums.ac.ir Original Article Isolation of Mucorales from biological environment and identification of Rhizopus among the isolates using PCR- RFLP Mahboobeh Madani1* ID , Mohammadali Zia2 ID 1Department of Microbiology, Falavarjan Branch, Islamic Azad University, Isfahan, Iran 2Department of Basic Science, (Khorasgan) Isfahan Branch, Islamic Azad University, Isfahan, Iran *Corresponding Author: Mahboobeh Madani, Tel: + 989134097629, Email: [email protected] Abstract Background and aims: Mucorales are fungi belonging to the category of Zygomycetes, found much in nature. Culture-based methods for clinical samples are often negative, difficult and time-consuming and mainly identify isolates to the genus level, and sometimes only as Mucorales. Therefore, applying fast and accurate diagnosis methods such as molecular approaches seems necessary. This study aims at isolating Mucorales for determination of Rhizopus genus between the isolates using molecular methods. Methods: In this descriptive observational study, a total of 500 samples were collected from air and different surfaces and inoculated on Sabouraud Dextrose Agar supplemented with chloramphenicol. Then, the fungi belonging to Mucorales were identified and their pure culture was provided. DNA extraction was done using extraction kit and the chloroform method. After amplification, the samples belonging to Mucorales were identified by observing 830 bp bands. For enzymatic digestion, enzyme BmgB1 was applied for identification of Rhizopus species by formation of 593 and 235 bp segments. Results: One hundred pure colonies belonging to Mucorales were identified using molecular methods and after enzymatic digestion, 21 isolates were determined as Rhizopus species. -
MM 0839 REV0 0918 Idweek 2018 Mucor Abstract Poster FINAL
Invasive Mucormycosis Management: Mucorales PCR Provides Important, Novel Diagnostic Information Kyle Wilgers,1 Joel Waddell,2 Aaron Tyler,1 J. Allyson Hays,2,3 Mark C. Wissel,1 Michelle L. Altrich,1 Steve Kleiboeker,1 Dwight E. Yin2,3 1 Viracor Eurofins Clinical Diagnostics, Lee’s Summit, MO 2 Children’s Mercy, Kansas City, MO 3 University of Missouri-Kansas City School of Medicine, Kansas City, MO INTRODUCTION RESULTS Early diagnosis and treatment of invasive mucormycosis (IM) affects patient MUC PCR results of BAL submitted for Aspergillus testing. The proportions of Case study of IM confirmed by MUC PCR. A 12 year-old boy with multiply relapsed pre- outcomes. In immunocompromised patients, timely diagnosis and initiation of appropriate samples positive for Mucorales and Aspergillus in BAL specimens submitted for IA testing B cell acute lymphoblastic leukemia, despite extensive chemotherapy, two allogeneic antifungal therapy are critical to improving survival and reducing morbidity (Chamilos et al., are compared in Table 2. Out of 869 cases, 12 (1.4%) had POS MUC PCR, of which only hematopoietic stem cell transplants, and CAR T-cell therapy, presented with febrile 2008; Kontoyiannis et al., 2014; Walsh et al., 2012). two had been ordered for MUC PCR. Aspergillus was positive in 56/869 (6.4%) of neutropenia (0 cells/mm3), cough, and right shoulder pain while on fluconazole patients, with 5/869 (0.6%) positive for Aspergillus fumigatus and 50/869 (5.8%) positive prophylaxis. Chest CT revealed a right lung cavity, which ultimately became 5.6 x 6.2 x 5.9 Differentiating diagnosis between IM and invasive aspergillosis (IA) affects patient for Aspergillus terreus. -
Paecilomyces Variotii Xylanase Production, Purification and Characterization with Antioxidant Xylo-Oligosaccharides Production
www.nature.com/scientificreports OPEN Paecilomyces variotii xylanase production, purifcation and characterization with antioxidant xylo‑oligosaccharides production Asmaa Abdella1, Samah Ramadan2, Ragaa A. Hamouda3,4, Amna A. Saddiq5, Nuha M. Alhazmi5 & Mahmoud A. Al‑Saman1* Paecilomyces variotii xylanase was, produced in stirred tank bioreactor with yield of 760 U/mL and purifed using 70% ammonium sulfate precipitation and ultra‑fltration causing 3.29‑fold purifcation with 34.47% activity recovery. The enzyme purity was analyzed on sodium dodecyl sulfate– polyacrylamide gel electrophoresis (SDS‑PAGE) confrming its monomeric nature as single band at 32 KDa. Zymography showed xylan hydrolysis activity at the same band. The purifed enzyme had optimum activity at 60 °C and pH 5.0. The pH stability range was 5–9 and the temperature stability was up 70 °C. Fe2+and Fe3+ exhibited inhibition of xylanase enzyme while Cu2+, Ca2+, Mg2+ and Mn2+ stimulated its activity. Mercaptoethanol stimulated its activity; however, Na2‑EDTA and SDS inhibited its activity. The purifed xylanase could hydrolyze beechwood xylan but not carboxymethyl cellulose (CMC), avicel or soluble starch. Paecilomyces variotii xylanase Km and Vmax for beechwood were determined to be 3.33 mg/mL and 5555 U/mg, respectively. The produced xylanase enzyme applied on beech xylan resulted in diferent types of XOS. The antioxidant activity of xylo‑oligosaccharides increased from 15.22 to 70.57% when the extract concentration was increased from 0.1 to 1.5 mg/ mL. The enzyme characteristics and kinetic parameters indicated its high efciency in the hydrolysis of xylan and its potential efectiveness in lignocellulosic hydrolysis and other industrial application. -
Allergic Bronchopulmonary Aspergillosis: a Perplexing Clinical Entity Ashok Shah,1* Chandramani Panjabi2
Review Allergy Asthma Immunol Res. 2016 July;8(4):282-297. http://dx.doi.org/10.4168/aair.2016.8.4.282 pISSN 2092-7355 • eISSN 2092-7363 Allergic Bronchopulmonary Aspergillosis: A Perplexing Clinical Entity Ashok Shah,1* Chandramani Panjabi2 1Department of Pulmonary Medicine, Vallabhbhai Patel Chest Institute, University of Delhi, Delhi, India 2Department of Respiratory Medicine, Mata Chanan Devi Hospital, New Delhi, India This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. In susceptible individuals, inhalation of Aspergillus spores can affect the respiratory tract in many ways. These spores get trapped in the viscid spu- tum of asthmatic subjects which triggers a cascade of inflammatory reactions that can result in Aspergillus-induced asthma, allergic bronchopulmo- nary aspergillosis (ABPA), and allergic Aspergillus sinusitis (AAS). An immunologically mediated disease, ABPA, occurs predominantly in patients with asthma and cystic fibrosis (CF). A set of criteria, which is still evolving, is required for diagnosis. Imaging plays a compelling role in the diagno- sis and monitoring of the disease. Demonstration of central bronchiectasis with normal tapering bronchi is still considered pathognomonic in pa- tients without CF. Elevated serum IgE levels and Aspergillus-specific IgE and/or IgG are also vital for the diagnosis. Mucoid impaction occurring in the paranasal sinuses results in AAS, which also requires a set of diagnostic criteria. Demonstration of fungal elements in sinus material is the hall- mark of AAS.