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https://www.readbyqxmd.com/read/28442200/next-generation-sequencing-and-culture-based-techniques-offer-complementary-insights-into-fungi-and-prokaryotes-in-beach-sands
#1
Daniela Romão, Christopher Staley, Filipa Ferreira, Raquel Rodrigues, Raquel Sabino, Cristina Veríssimo, Ping Wang, Michael Sadowsky, João Brandão
A next-generation sequencing (NGS) approach, in conjunction with culture-based methods, was used to examine fungal and prokaryotic communities for the presence of potential pathogens in beach sands throughout Portugal. Culture-based fungal enumeration revealed low and variable concentrations of the species targeted (yeasts and dermatophytes), which were underrepresented in the community characterized by NGS targeting the ITS1 region. Conversely, NGS indicated that the potentially pathogenic species Purpureocillium liliacinum comprised nearly the entire fungal community...
April 23, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28425361/assessment-of-real-time-pcr-cycle-threshold-values-in-microsporum-canis-culture-positive-and-culture-negative-cats-in-an-animal-shelter-a-field-study
#2
Linda S Jacobson, Lauren McIntyre, Jenny Mykusz
Objectives Real-time PCR provides quantitative information, recorded as the cycle threshold (Ct) value, about the number of organisms detected in a diagnostic sample. The Ct value correlates with the number of copies of the target organism in an inversely proportional and exponential relationship. The aim of the study was to determine whether Ct values could be used to distinguish between culture-positive and culture-negative samples. Methods This was a retrospective analysis of Ct values from dermatophyte PCR results in cats with suspicious skin lesions or suspected exposure to dermatophytosis...
April 1, 2017: Journal of Feline Medicine and Surgery
https://www.readbyqxmd.com/read/28419352/dermatophytes-and-dermatophytosis-in-the-eastern-and-southern-parts-of-africa
#3
E I Nweze, I E Eke
Dermatophytosis is currently a disease of global importance and a public health burden. It is caused by dermatophytes, which attack and grow on dead animal keratin. Dermatophytes belong to three genera, namely, Epidermophyton, Microsporum, and Trichophyton. The predominant clinical forms and causative agents vary from one region of the world to another. Poor socioeconomic status, high population densities, and poor sanitary conditions are some of the factors responsible for the high prevalence of dermatophytosis in many developing countries, which include countries in southern and eastern Africa, the focus of this review...
April 17, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28416557/terbinafine-resistance-of-trichophyton-clinical-isolates-caused-by-specific-point-mutations-in-the-squalene-epoxidase-gene
#4
Tsuyoshi Yamada, Mari Maeda, Mohamed Mahdi Alshahni, Reiko Tanaka, Takashi Yaguchi, Olympia Bontems, Karine Salamin, Marina Fratti, Michel Monod
Terbinafine is one of the allylamine antifungal agents, whose target is squalene epoxidase (SQLE). This agent has been extensively used in the therapy of dermatophyte infections. The incidence of patients with tinea pedis or unguium tolerant to terbinafine treatment prompted us to screen terbinafine resistance of all Trichophyton clinical isolates from the laboratory of Centre Hospitalier Universitaire Vaudois collected over a three-year period, and to identify their mechanism of resistance. Among 2056 tested isolates, 17 (≈ 1%) showed reduced terbinafine susceptibility, all of which were found to harbor SQLE gene alleles with different single point mutations, leading to single amino acid substitutions at one of four positions (Leu(393), Phe(397), Phe(415) and His(440)) of the SQLE protein...
April 17, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28405548/clinicoepidemiological-and-mycological-study-of-tinea-capitis-in-the-pediatric-population-of-kashmir-valley-a-study-from-a-tertiary-care-centre
#5
Yasmeen J Bhat, Sumaya Zeerak, Farhat Kanth, Atiya Yaseen, Iffat Hassan, Rubina Hakak
BACKGROUND: Tinea capitis is a superficial fungal infection that predominantly affects the pediatric population. The etiological factors vary from region to region, and the exact incidence remains obscure. The clinicoepidemiological and mycological aspects of this dermatophytosis were studied in a tertiary care centre in Kashmir valley. AIM: To determine the clinicoepidemiological aspects and mycological findings of dermatophytes involved in tinea capitis cases in Kashmir valley...
March 2017: Indian Dermatology Online Journal
https://www.readbyqxmd.com/read/28403528/superficial-black-onychomycosis-due-to-neoscytalidium-dimidiatum
#6
N Di Chiacchio, L F Noriega, N Gioia Di Chiacchio, J Ocampo-Garza
Onychomycosis is the most common onychopathy observed in adults and the elderly, and it is a frequent reason for medical visits.(1) Its prevalence ranges from 2.0-26.9%, depending on the population and geographic region.(1,2) Non-dermatophyte molds are responsible for 1.5-17.6% of onychomycosis cases, with higher prevalence in tropical and subtropical countries. This article is protected by copyright. All rights reserved.
April 12, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28399217/fungi-isolated-from-house-flies-diptera-muscidae-on-penned-cattle-in-south-texas
#7
Cherity A Ysquierdo, Pia U Olafson, Donald B Thomas
Musca domestica L. were collected from cattle diagnosed with bovine ringworm to evaluate the potential of the house fly to disseminate Trichophyton verrucosum E. Bodin, a fungal dermatophyte that is the causative agent for ringworm in cattle. Fungal isolates were cultured from 45 individual flies on supplemented Sabouraud dextrose agar, and isolates were identified using morphological and microscopic approaches. Each isolate was identified further by PCR amplification of the ribosomal DNA locus with fungal-specific primers and subsequent amplicon sequencing...
February 4, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28391957/dermatophytic-disease-with-deficit-in-card9-a-new-case-with-a-brain-impairment
#8
O Boudghene Stambouli, N Amrani, K Boudghéne Stambouli, F Bouali
INTRODUCTION: Dermatophytic disease individualized by Hadida and Schousboe in 1959 is a rare form of chronic dermatophyte infection; characterized by subcutaneous and visceral invasion and a therapeutic failure. We report a case of dermatophytic disease with brain abscess in an Algerian patient. OBSERVATIONS: The patient was 47-year-old, she was born parents first cousins. She had since the age of 10 years scaly scalp lesions that became secondarily papular and nodular...
April 5, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28391495/boric-acid-inhibition-of-trichophyton-rubrum-growth-and-conidia-formation
#9
Martin Schmidt
Trichophyton rubrum is a common human dermatophyte that is the causative agent of 80-93% of fungal infections of the skin and nails. While dermatophyte infections in healthy people are easily treatable with over-the-counter medications, such infections pose a higher risk for patients with compromised immune function and impaired regenerative potential. The efficacy of boric acid (BA) for the treatment of vaginal yeast infections prompted an investigation of the effect of BA on growth and morphology of T. rubrum...
April 8, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28389891/a-unique-clinicopathological-manifestation-of-fungal-infection-a-case-series-of-deep-dermatophytosis-in-immunosuppressed-patients
#10
Ruben Kershenovich, Shany Sherman, Ofer Reiter, Shiran Reiss Huss, Elena Didkovsky, Daniel Mimouni, Emmilia Hodak, Rina Segal
BACKGROUND: Dermatophytes are the most common cause of superficial fungal infections in humans. Deep dermatophytosis, however, is rare, described to date only in isolated case reports, usually in the setting of systemic immunosuppression. OBJECTIVE: To present the 15-year experience of a tertiary dermato-mycology clinic with the diagnosis and treatment of deep dermatophytosis. METHODS: Patients were identified by database search. Clinical, mycological, histological, and treatment data were collected from the medical files...
April 8, 2017: American Journal of Clinical Dermatology
https://www.readbyqxmd.com/read/28384862/enzymatic-and-non-enzymatic-virulence-activities-of-dermatophytes-on-solid-media
#11
Elangovan Elavarashi, Anupma Jyoti Kindo, Sudha Rangarajan
INTRODUCTION: Dermatophytes are keratinophilic fungi causing superficial cutaneous infections that account 20-25% of the global population. As per literature search, there is a dearth in the study on virulence factors of dermatophytes from the Indian sub-continent and moreover the association of the virulence factors and the host tissue in vitro helps in understanding the host-pathogen interaction. AIM: To analyse the enzymatic and non-enzymatic virulence activities of dermatophytes on solid media...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28378259/clinical-laser-treatment-of-toenail-onychomycoses
#12
Antonio Zalacain, Alejandra Merlos, Elena Planell, Erica G Cantadori, Teresa Vinuesa, Miguel Viñas
Onychomycoses are fungal infections of the fingernails or toenails having a prevalence of 3% among adults and accounts for 50% of nail infections. It is caused by dermatophytes, non-dermatophyte filamentous fungi, and yeasts. Compressions and microtraumas significantly contribute to onychomycosis. Laser and photodynamic therapies are being proposed to treat onychomycosis. Laser light (1064 nm) was used to treat onychomycosis in 156 affected toenails. Patients were clinically followed up for 9 months after treatment...
April 4, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28376264/synthesis-and-structure-activity-relationships-of-novel-benzylamine-type-antifungals-as-butenafine-related-antimycotics
#13
Jürgen Krauss, Martina Stadler, Franz Bracher
Benzylamine-type antimycotics like naftifine, butenafine, or terbinafine are a well-known class of antimycotics since the 1980s. The following paper describes the synthesis and biological evaluation of a series of novel benzylamine-type antimycotics characterized by an isooctyl side chain and various substituents at the benzylamine moiety. The compounds were prepared from benzaldehyde derivatives and 2-amino-6-methylheptane by reductive amination with sodium triacetoxyborohydride and subsequent precipitation with hydrogen chloride...
April 4, 2017: Archiv der Pharmazie
https://www.readbyqxmd.com/read/28366916/clinico-epidemiological-study-of-tinea-incognito-with-microbiological-correlation
#14
Bornali Dutta, Elmy Samsul Rasul, Bobita Boro
BACKGROUND: Tinea incognito is a dermatophytic infection with a clinical presentation that is modified due to previous treatment with topical or systemic steroids, as well as topical immunomodulators. It tends to mimic other dermatological conditions. AIMS: To evaluate the various clinical manifestations, sites, predisposing factors and causative agents of tinea incognito. METHODS: A prospective observational study was done on one hundred clinically suspected cases of tinea incognito, with a history of topical or systemic steroid use for a period of at least six weeks...
March 29, 2017: Indian Journal of Dermatology, Venereology and Leprology
https://www.readbyqxmd.com/read/28347600/-mycological-profile-of-onychomycosis-in-yaound%C3%A3-cameroon
#15
E A Kouotou, F A Kechia, Y Iwewe Somo, U Nguena Feungue, N J R Nansseu, R Moyou Somo
BACKGROUND: The lack of data concerning the mycological spectrum of onychomycosis in Cameroon prompted us to conduct the present study, which aimed to determine the mycological profile of onychomycosis diagnosed during dermatologic consultations in Yaoundé, Cameroon. METHODS: This was a cross-sectional study held from October 2014 to March 2015 in six hospitals of Yaoundé. Patients suspected of onychomycosis were consecutively recruited during dermatologic consultations; anamnestic and clinical data were recorded and one or several nail fragments sampled for mycological examination (direct examination or culture)...
March 24, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28347599/the-anti-dermatophyte-activity-of-zataria-multiflora-essential-oils
#16
M Mahboubi, R HeidaryTabar, E Mahdizadeh
OBJECTIVE: Dermtophytes are a group of pathogenic fungi and the major cause of dermatophytosis in humans and animals. Fighting dermatophytes by natural essential oils is one important issue in new researches. MATERIALS AND METHODS: In this investigation, we evaluated the anti-dermatophyte activities of three samples of Z. multiflora essential oils against dermatophytes along with analysis of chemical compositions of the essential oils and their anti-elastase activities on elastase production in dermatophytes...
March 24, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28346993/artemisia-sieberi-besser-essential-oil-and-treatment-of-fungal-infections
#17
REVIEW
Mohaddese Mahboubi
A. sieberi essential oil has been used for treatment of hardly curable infectious ulcers in Middle East Medicine and has been famous due to its wormicide effects. In this review, we evaluated the potency of A. sieberi essential oil in treatment of fungal infections. We searched in PubMed Central, Science direct, Wiley, Springer, SID, and accessible books, reports, thesis. There is a lot of mixed information on chemical compositions of A. sieberi essential oil, but most articles reported α, β-thujones as the main components of essential oils...
March 22, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28339548/enhancement-of-the-antidermatophytic-activity-of-silver-nanoparticles-by-q-switched-nd-yag-laser-and-monoclonal-antibody-conjugation
#18
Salama A Ouf, Abdel-Aleam H Mohamed, Amira A El-Adly
The objective of this research was to investigate the effect of silver nanoparticles (AgNPs), free or conjugated with monoclonal antibody and mediated by Q-switched Nd:YAG laser on five dermatophytes. The laser was applied for 45 s at 532 nm and 0.8 J/cm2. The application of AgNPs combined with laser caused an increase in fungal susceptibility compared to application of AgNPs alone. The MIC50 and MIC100 recorded 3 and 9 μg/ml in the case of E. floccosum (the most susceptible species), 10 and 19 μg/ml for T...
October 7, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28339534/inactivation-of-dermatophyte-infection-by-nonthermal-plasma-on-animal-model
#19
Vladimír Scholtz, Hana Soušková, Michaela Švarcová, Vítezslav Kríha, Helena Živná, Jaroslav Julák
Superficial fungal infections are a major epidemiological issue with increasing prevalence and are a common global problem. This article describes experimental therapy of superficial fungal skin infection using low-temperature plasma. Groups of guinea pigs were artificially infected with Trichophyton mentagrophytes SK 3286 dermatophyte and treated with plasma produced by a DC cometary discharge with an inserted grid. The course of infection was a week shorter and milder in animals treated by plasma than that in nontreated animals, the significant lowering of dermatophytic germs also occurred in the treated group...
October 7, 2016: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28330133/bioactive-metabolites-produced-by-streptomyces-cheonanensis-vuk-a-from-coringa-mangrove-sediments-isolation-structure-elucidation-and-bioactivity
#20
Ushakiranmayi Mangamuri, Vijayalakshmi Muvva, Sudhakar Poda, Krishna Naragani, Rajesh Kumar Munaganti, Bhujangarao Chitturi, Venkateswarlu Yenamandra
The strain VUK-A was isolated from a sediment sample of the Coringa mangrove ecosystem was identified as Streptomyces cheonanensis based on morphological, physiological, biochemical and molecular properties. Chemical investigation of the secondary metabolites of the strain Streptomyces cheonanensis VUK-A has led to the segregation of two bioactive compounds, namely 2-Methyl butyl propyl phthalate (1) and Diethyl phthalate (2) using column chromatography. The chemical structure of the active compounds was established on the basis of spectroscopic analysis, including (1)H NMR and (13)C NMR spectroscopies, FTIR and EIMS...
June 2016: 3 Biotech
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