Yesterday, Today and Tomorrow of Mycology Editorial Imedpub Journals
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Next-Generation Sequencing for Hypothesis-Free Genomic Detection
Frickmann et al. BMC Microbiology (2019) 19:75 https://doi.org/10.1186/s12866-019-1448-0 RESEARCH ARTICLE Open Access Next-generation sequencing for hypothesis- free genomic detection of invasive tropical infections in poly-microbially contaminated, formalin-fixed, paraffin-embedded tissue samples – a proof-of-principle assessment Hagen Frickmann1,2* , Carsten Künne3, Ralf Matthias Hagen4, Andreas Podbielski2, Jana Normann2, Sven Poppert5,6, Mario Looso3 and Bernd Kreikemeyer2 Abstract Background: The potential of next-generation sequencing (NGS) for hypothesis-free pathogen diagnosis from (poly-)microbially contaminated, formalin-fixed, paraffin embedded tissue samples from patients with invasive fungal infections and amebiasis was investigated. Samples from patients with chromoblastomycosis (n = 3), coccidioidomycosis (n = 2), histoplasmosis (n = 4), histoplasmosis or cryptococcosis with poor histological discriminability (n = 1), mucormycosis (n = 2), mycetoma (n = 3), rhinosporidiosis (n = 2), and invasive Entamoeba histolytica infections (n = 6) were analyzed by NGS (each one Illumina v3 run per sample). To discriminate contamination from putative infections in NGS analysis, mean and standard deviation of the number of specific sequence fragments (paired reads) were determined and compared in all samples examined for the pathogens in question. Results: For matches between NGS results and histological diagnoses, a percentage of species-specific reads greater than the 4th standard deviation above the mean value of all 23 assessed sample materials was required. Potentially etiologically relevant pathogens could be identified by NGS in 5 out of 17 samples of patients with invasive mycoses and in 1 out of 6 samples of patients with amebiasis. Conclusions: The use of NGS for hypothesis-free pathogen diagnosis from contamination-prone formalin- fixed, paraffin-embedded tissue requires further standardization. -
Introduction to Mycology
INTRODUCTION TO MYCOLOGY The term "mycology" is derived from Greek word "mykes" meaning mushroom. Therefore mycology is the study of fungi. The ability of fungi to invade plant and animal tissue was observed in early 19th century but the first documented animal infection by any fungus was made by Bassi, who in 1835 studied the muscardine disease of silkworm and proved the that the infection was caused by a fungus Beauveria bassiana. In 1910 Raymond Sabouraud published his book Les Teignes, which was a comprehensive study of dermatophytic fungi. He is also regarded as father of medical mycology. Importance of fungi: Fungi inhabit almost every niche in the environment and humans are exposed to these organisms in various fields of life. Beneficial Effects of Fungi: 1. Decomposition - nutrient and carbon recycling. 2. Biosynthetic factories. The fermentation property is used for the industrial production of alcohols, fats, citric, oxalic and gluconic acids. 3. Important sources of antibiotics, such as Penicillin. 4. Model organisms for biochemical and genetic studies. Eg: Neurospora crassa 5. Saccharomyces cerviciae is extensively used in recombinant DNA technology, which includes the Hepatitis B Vaccine. 6. Some fungi are edible (mushrooms). 7. Yeasts provide nutritional supplements such as vitamins and cofactors. 8. Penicillium is used to flavour Roquefort and Camembert cheeses. 9. Ergot produced by Claviceps purpurea contains medically important alkaloids that help in inducing uterine contractions, controlling bleeding and treating migraine. 10. Fungi (Leptolegnia caudate and Aphanomyces laevis) are used to trap mosquito larvae in paddy fields and thus help in malaria control. Harmful Effects of Fungi: 1. -
FUNGI Why Care?
FUNGI Fungal Classification, Structure, and Replication -Commonly present in nature as saprophytes, -transiently colonising or etiological agenses. -Frequently present in biological samples. -They role in pathogenesis can be difficult to determine. Why Care? • Fungi are a cause of nosocomial infections. • Fungal infections are a major problem in immune suppressed people. • Fungal infections are often mistaken for bacterial infections, with fatal consequences. Most fungi live harmlessly in the environment, but some species can cause disease in the human host. Patients with weakened immune function admitted to hospital are at high risk of developing serious, invasive fungal infections. Systemic fungal infections are a major problem among critically ill patients in acute care settings and are responsible for an increasing proportion of healthcare- associated infections THE IMPORTANCE OF FUNGI • saprobes • symbionts • commensals • parasites The fungi represent a ubiquitous and diverse group of organisms, the main purpose of which is to degrade organic matter. All fungi lead a heterotrophic existence as saprobes (organisms that live on dead or decaying matter), symbionts (organisms that live together and in which the association is of mutual advantage), commensals (organisms living in a close relationship in which one benefits from the relationship and the other neither benefits nor is harmed), or as parasites (organisms that live on or within a host from which they derive benefits without making any useful contribution in return; in the case of pathogens, the relationship is harmful to the host). Fungi have emerged in the past two decades as major causes of human disease, especially among those individuals who are immunocompromised or hospitalized with serious underlying diseases. -
Sporothrix Schenckii: ➢ Thermal Dimorphic
Subcutaneous mycoses ➢1-Mycetoma ➢2-Sporotrichosis ➢3-Chromoblastomycosis ➢4-Rhinosporidiosis ➢5- Lobomycosis ➢6- Entomophthoramycosis Sporotrichosis Rose gardener’s disease Chronic desease Agent Sporothrix schenckii: ➢ Thermal dimorphic ➢ In soil ➢ On decaying vegetation,plants,plant products (hay, straw, sphagnum moss), and a variety of animals (cats) ➢ less than 37° C (hyphal) ➢ 37° C (yeast) ➢ Sporothrix brasiliensis ➢ Sporothrix globosa Epidemiology ➢Worldwide ➢Tropical regions ➢Mexico ➢Brazile ➢France ➢USA Occupational disease: ➢Farmers ➢ ➢Workers ➢Gardeners ➢Florists Predisposing factors: ➢Trauma ➢Inhalation (very rarely) ➢HIV Clinical Syndromes 1-lymphocutaneous 2-Fixed cutaneous 3- Osteoarticular involvement 4-Pulmonary 5-Systemic Primary infection 1-Lymphocutaneous sporotrichosis 2-Fixed cutaneous sporotrichosis: Fixed cutaneous sporotrichosis verrucous-type sporotrichosis localized cutaneous type Paronychia sporotrichosis Osteoarticular involvement Pulmonary sporotrichosis: ➢Alcoholic ➢Pulmonary tuberculosis, diabetes mellitus and steroid ➢A productive cough ➢Low-grade fever ➢Weight loss Systemic sporotrichosis Transmission: ➢Dog bite ➢parrot bite ➢Insects bite ➢Cases of animal-to-human transmission Laboratory Diagnosis: 1-Collection of samples: ➢Drainage from skin lesions ➢Exudates ➢Pus ➢Blood ➢Pulmonary secretions ➢Tissue biopsy specimens 2-Direct examination ➢Gram ➢PAS ➢GMS ➢H & E ❖Yeast Cells ❖Asteroid body: Elongated Buds (“Cigar Body”) Wet Mount BHI Blood 37˚C Yeast with Elongated Daughter Cell Biopsy of subcutaneous tissue -
Boards' Fodder
boards’ fodder Medical Mycology By Adriana Schmidt, MD, and Natalie M. Curcio, MD, MPH. (Updated July 2015*) SUPERFICIAL ORGANISM CLINICAL HISTO/KOH TREATMENT MYCOSES* Pityriasis Malessezia furfur Hypo- or hyper-pigmented Spaghetti & meatballs: Antifungal shampoos and/or versicolor macules short hyphae + yeast PO therapy Tinea nigra Hortaea werneckii (formerly Brown-black non-scaly Branching septate hyphae Topical imidazoles or palmaris Phaeoannellomyces werneckii) macules + budding yeast allylamines Black piedra Piedraia hortae Hard firm black Dark hyphae around concretions acrospores Cut hair off, PO terbinafine, White piedra Trichosporon ovoides or inkin Soft loose white Blastoconidia, imidazoles, or triazoles (formely beigelii) concretions arthroconidia Fluorescent small Microsporum Canis KOH: spores on outside spore ectothrix: M. audouinii of the hair shaft; “Cats And Dogs M. distortum Wood’s lamp --> yellow Sometimes Fight T. schoenleinii fluorescence & Growl” M. ferrugineum+/- gypseum Large spore Trichophyton spp. (T. tonsurans in North America; T. violaceum in KOH: spores within hair Topical antifungals; PO endothrix Europe, Asia, parts of Africa). shaft antifungals for T. manuum, Tinea corporis T. rubrum > T. mentag. Majocchi’s granuloma: T. rubrum capitis, unguium T. pedis Moccasin: T. rubrum, E. floccosum. Interdigital/vesicular: T. mentag T. unguium Distal lateral, proximal and proximal white subungual: T. rubrum. White superficial: T. mentag. HIV: T. rubrum SUBQ MYCOSES** ORGANISM TRANSMISSION CLINICAL HISTO/KOH TREATMENT -
Rhinosporidium Seeberi: a Human Pathogen from a Novel Group of Aquatic Protistan Parasites
Research Rhinosporidium seeberi: A Human Pathogen from a Novel Group of Aquatic Protistan Parasites David N. Fredricks,*† Jennifer A. Jolley,* Paul W. Lepp,* Jon C. Kosek,† and David A. Relman*† *Stanford University, Stanford, California, USA; and †Veterans Affairs, Palo Alto Health Care System, Palo Alto, California, USA Rhinosporidium seeberi, a microorganism that can infect the mucosal surfaces of humans and animals, has been classified as a fungus on the basis of morphologic and histochemical characteristics. Using consensus polymerase chain reaction (PCR), we amplified a portion of the R. seeberi 18S rRNA gene directly from infected tissue. Analysis of the aligned sequence and inference of phylogenetic relationships showed that R. seeberi is a protist from a novel clade of parasites that infect fish and amphibians. Fluorescence in situ hybridization and R. seeberi-specific PCR showed that this unique 18S rRNA sequence is also present in other tissues infected with R. seeberi. Our data support the R. seeberi phylogeny recently suggested by another group. R. seeberi is not a classic fungus, but rather the first known human pathogen from the DRIPs clade, a novel clade of aquatic protistan parasites (Ichthyosporea). Rhinosporidiosis manifests as slow-growing, that has been difficult to classify. Recently, tumorlike masses, usually of the nasal mucosa or R. seeberi has been considered a fungus, but it was ocular conjunctivae of humans and animals. originally thought to be a protozoan parasite (2). Patients with nasal involvement often have Its morphologic characteristics resemble those of unilateral nasal obstruction or bleeding due to Coccidioides immitis: both organisms have polyp formation. The diagnosis is established by mature stages that consist of large, thick-walled, observing the characteristic appearance of the organism in tissue biopsies (Figure 1). -
Redalyc.Equine Nasopharyngeal Cryptococcoma Due To
Ciência Rural ISSN: 0103-8478 [email protected] Universidade Federal de Santa Maria Brasil Sales da Cruz, Raquel Aparecida; de Oliveira Reis, Matheus; Leite Filho, Ronaldo Viana; Gonçalves, Maiara Aline; Spanamberg, Andréia; Sonne, Luciana; Ferreiro, Laerte; Petinatti Pavarini, Saulo; Driemeier, David Equine nasopharyngeal cryptococcoma due to Cryptococcus gattii Ciência Rural, vol. 47, núm. 10, 2017, pp. 1-5 Universidade Federal de Santa Maria Santa Maria, Brasil Available in: http://www.redalyc.org/articulo.oa?id=33152366004 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Ciência Rural, Santa Maria, v.47:Equine 10, nasopharyngeal e20170151, cryptococcoma 2017 due to Cryptococcus http://dx.doi.org/10.1590/0103-8478cr20170151 gattii. 1 ISSNe 1678-4596 PATHOLOGY Equine nasopharyngeal cryptococcoma due to Cryptococcus gattii Raquel Aparecida Sales da Cruz1* Matheus de Oliveira Reis1 Ronaldo Viana Leite Filho1 Maiara Aline Gonçalves1 Andréia Spanamberg2 Luciana Sonne1 Laerte Ferreiro2 Saulo Petinatti Pavarini1 David Driemeier1 1Setor de Patologia Veterinária (SPV), Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, 9090, 91540-000, Porto Alegre, RS, Brasil. E-mail: [email protected]. *Corresponding author. 2Setor de Micologia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brasil. ABSTRACT: Cryptococcus gattii is often associated with pulmonary and systemic infections in humans and animals. In this research we report a case of nasopharyngeal cryptococoma caused by C. gatti in an equine. A 10-year-old mare presented a mass obstructing the oropharynx. -
Fungal Infections (Mycoses): Dermatophytoses (Tinea, Ringworm)
Editorial | Journal of Gandaki Medical College-Nepal Fungal Infections (Mycoses): Dermatophytoses (Tinea, Ringworm) Reddy KR Professor & Head Microbiology Department Gandaki Medical College & Teaching Hospital, Pokhara, Nepal Medical Mycology, a study of fungal epidemiology, ecology, pathogenesis, diagnosis, prevention and treatment in human beings, is a newly recognized discipline of biomedical sciences, advancing rapidly. Earlier, the fungi were believed to be mere contaminants, commensals or nonpathogenic agents but now these are commonly recognized as medically relevant organisms causing potentially fatal diseases. The discipline of medical mycology attained recognition as an independent medical speciality in the world sciences in 1910 when French dermatologist Journal of Raymond Jacques Adrien Sabouraud (1864 - 1936) published his seminal treatise Les Teignes. This monumental work was a comprehensive account of most of then GANDAKI known dermatophytes, which is still being referred by the mycologists. Thus he MEDICAL referred as the “Father of Medical Mycology”. COLLEGE- has laid down the foundation of the field of Medical Mycology. He has been aptly There are significant developments in treatment modalities of fungal infections NEPAL antifungal agent available. Nystatin was discovered in 1951 and subsequently and we have achieved new prospects. However, till 1950s there was no specific (J-GMC-N) amphotericin B was introduced in 1957 and was sanctioned for treatment of human beings. In the 1970s, the field was dominated by the azole derivatives. J-GMC-N | Volume 10 | Issue 01 developed to treat fungal infections. By the end of the 20th century, the fungi have Now this is the most active field of interest, where potential drugs are being January-June 2017 been reported to be developing drug resistance, especially among yeasts. -
Oral Fungal Infections Diagnosis and Management
Oral Fungal Infections Diagnosis and Management a,b,c,d,e, f,g b,c,h David R. Telles, DDS *, Niraj Karki, MD , Michael W. Marshall, DDS, FICD KEYWORDS Candidiasis Oral thrush Oral fungal infection Mucormycosis Histoplasmosis Blastomycosis Aspergillosis Geotrichosis KEY POINTS Most solitary or primary oral fungal infections are rare with the exception of oral candidiasis. Candidiasis is the leading infection that most dental practitioners will see in clinical practice. Unless diagnosed early and treated aggressively, mucormycosis can be a locally invasive and disfiguring oral and maxillofacial fungal infection. This review includes several oral and maxillofacial fungal infections, including mucormy- cosis, candidiasis, aspergillosis, blastomycosis, histoplasmosis, cryptococcosis, and coccidioidomycosis. INTRODUCTION Fungal infections are of great concern in dentistry. Patients may present with infections that can be superficial or indicative of a more serious systemic illness. This article focuses on fungal infections that can range from primary (superficial) to disseminated infections that have a high mortality. Included in the review are the most common oral and maxillofacial fungal infections, route of spread, diagnosis, treatment as well The authors have nothing to disclose. a Oral & Maxillofacial Surgery, Herman Ostrow USC School of Dentistry, 925 West 34th, Street, Los Angeles, CA 90089, USA; b Oral & Maxillofacial Surgery, Private Practice: Huntington Beach Oral & Maxillofacial Surgery, 7677 Center Avenue, Suite 206, -
Conjunctival Candidiasis Mimicking Ocular Surface Squamous Neoplasia
Conjunctival Candidiasis Mimicking Ocular Surface Squamous Neoplasia Zhiyu Peng Fudan University Eye Ear Nose and Throat Hospital https://orcid.org/0000-0001-8318-8878 Jiang Qian Fudan University Eye Ear Nose and Throat Hospital Yinan Han ( [email protected] ) Fudan Eye & ENT Hospital, Shanghai Brief report Keywords: conjunctivitis, candidiasis, mycosis, squamous cell neoplasm Posted Date: July 13th, 2021 DOI: https://doi.org/10.21203/rs.3.rs-691327/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Page 1/8 Abstract Purpose To report a case of conjunctival candidiasis mimicking ocular surface squamous neoplasia. Case presentation A 71-year-old man presented with a history of persistent redness, swelling and watering in the left eye accompanying an enlarging mass in the conjunctiva. He underwent excisional biopsy which showed granulomatous inammation accompanied by irregular and atypical squamous epithelium hyperplasia. Periodic acid-Schiff stain and methenamine silver stain revealed a fungi infection. Further secretion smear was performed to clarify the pathogen as Candida albicans and a chronic fungal maxillary sinusitis was found through imaging test. Thus a diagnosis of conjunctival candidiasis was made. Conclusions Conjunctivitis caused by fungi is rare and a trigger such as agriculture trauma, immunocompromise state, contact history to fungal environment or contaminated water or infection of adjacent organs occurs in most cases. We report the case not only to share diagnostic and treatment experience, but also describe the unique histopathological manifestation leading to a speculation that chronic fungal or candida albicans infection might induce squamous metaplasia. Introduction Ocular fungal infection is a sight-threating disease with multiple incentives typically involving the cornea and internal structures of the eye. -
Essential Oils of Lamiaceae Family Plants As Antifungals
biomolecules Review Essential Oils of Lamiaceae Family Plants as Antifungals Tomasz M. Karpi ´nski Department of Medical Microbiology, Pozna´nUniversity of Medical Sciences, Wieniawskiego 3, 61-712 Pozna´n,Poland; [email protected] or [email protected]; Tel.: +48-61-854-61-38 Received: 3 December 2019; Accepted: 6 January 2020; Published: 7 January 2020 Abstract: The incidence of fungal infections has been steadily increasing in recent years. Systemic mycoses are characterized by the highest mortality. At the same time, the frequency of infections caused by drug-resistant strains and new pathogens e.g., Candida auris increases. An alternative to medicines may be essential oils, which can have a broad antimicrobial spectrum. Rich in the essential oils are plants from the Lamiaceae family. In this review are presented antifungal activities of essential oils from 72 Lamiaceae plants. More than half of these have good activity (minimum inhibitory concentrations (MICs) < 1000 µg/mL) against fungi. The best activity (MICs < 100) have essential oils from some species of the genera Clinopodium, Lavandula, Mentha, Thymbra, and Thymus. In some cases were observed significant discrepancies between different studies. In the review are also shown the most important compounds of described essential oils. To the chemical components most commonly found as the main ingredients include β-caryophyllene (41 plants), linalool (27 plants), limonene (26), β-pinene (25), 1,8-cineole (22), carvacrol (21), α-pinene (21), p-cymene (20), γ-terpinene (20), and thymol (20). Keywords: Labiatae; fungi; Aspergillus; Cryptococcus; Penicillium; dermatophytes; β-caryophyllene; sesquiterpene; monoterpenes; minimal inhibitory concentration (MIC) 1. Introduction Fungal infections belong to the most often diseases of humans. -
Reference Guide to the Classification of Fungi and Fungal-Like Protists, with Emphasis on the Fungal Genera with Medical Importance (Circa 2009)
Reference Guide to the Classification of Fungi and Fungal-like Protists, with Emphasis on the Fungal Genera with Medical Importance (circa 2009) This outline lists some common genera of fungi and fungal-like protists, which are classified into a number of phyla, subphyla, classes, subclasses and in most cases orders and families. The classification is patterned after the broad schemes of Hawksworth et al. (1), Kirk et al. (2), Eriksson et al. (3), Alexopoulos et al. (4), and Blackwell et al (5) and was devised by PJS to reflect his perception of the relationships of the various organisms traditionally studied by mycologists and included in textbooks and manuals dealing with mycology. The classification ranks below class reflect interpretations of Alexopoulos et al. (7), and PJS. It should be noted that different biologists until recently have had varying opinions on which organisms to include in the Kingdom Fungi and on what rank should be accorded each major group. This classification outline distributes the fungi and fungal-like organisms often dealt with in traditional mycology among the three kingdoms, Protozoa, Chromista and Fungi. With only a relatively few exceptions, the genera listed are very common or are of medical importance. However, not all genera of the Kingdom Fungi involved in human and animal medical mycology are listed. Kingdom: Protozoa/Amebozoa/Eumycetozoa (collection of numerous phyla of eukaryotic, generally wall- less, unicellular, plasmodial, or colonial phagotrophic microorganisms, which includes at least four fungal-like phyla that are no longer considered to be part of the Kingdom Fungi). These have all been reclassified and renamed to reflect their nonfungal nature (see for example Reading Sz 5, which discusses the reclassification of Rhinosporidium seeberi into the additional new Phylum Mezomycetozoea).