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https://www.readbyqxmd.com/read/28198097/inibitory-effects-of-linalool-on-fungal-pathogenicity-of-clinical-isolates-of-microsporum-canis-and-microsporum-gypseum
#1
Kaltz V S Silva, Maria I O Lima, Gustavo N Cardoso, Aldeir S Santos, Gezaíldo S Silva, Fillipe O Pereira
In humans worldwide, Microsporum sp. is a frequent agent of dermatophytsosis. When considering the emergence of resistant fungi and the clinical relevance of dermatophytosis, terpene antifungal activity is of great interest. Linalool is a monoterpene alcohol with pharmacological properties. In this study, antifungal in vitro activity of linalool and ketoconazole (as a positive control) were evaluated against clinical isolates of M. canis and M. gypseum. The minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC) of each drug were determined by broth microdilution...
February 15, 2017: Mycoses
https://www.readbyqxmd.com/read/28188051/incidence-and-biodiversity-of-yeasts-dermatophytes-and-non-dermatophytes-in-superficial-skin-infections-in-assiut-egypt
#2
A H Moubasher, M A Abdel-Sater, Z Soliman
OBJECTIVE: The aim was to identify the incidence of the causal agents from dermatophytes, non-dermatophytes and yeasts in Assiut Governorate employing, beside the morphological and physiological techniques, the genotypic ones. PATIENTS: Samples from infected nails, skin and hair were taken from 125 patients. MATERIALS AND METHODS: Patients who presented with onychomycosis, tinea capitis, tinea corporis, tinea cruris and tinea pedis during the period from February 2012 to October 2015 were clinically examined and diagnosed by dermatologists and were guided to Assiut University Mycological Centre for direct microscopic examination, culturing and identification...
February 7, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28176804/griseofulvin-impairs-intraerythrocytic-growth-of-plasmodium-falciparum-through-ferrochelatase-inhibition-but-lacks-activity-in-an-experimental-human-infection-study
#3
Clare M Smith, Ante Jerkovic, Thy Thuc Truong, Simon J Foote, James S McCarthy, Brendan J McMorran
Griseofulvin, an orally active antifungal drug used to treat dermatophyte infections, has a secondary effect of inducing cytochrome P450-mediated production of N-methyl protoporphyrin IX (N-MPP). N-MPP is a potent competitive inhibitor of the heme biosynthetic-enzyme ferrochelatase, and inhibits the growth of cultured erythrocyte stage Plasmodium falciparum. Novel drugs against Plasmodium are needed to achieve malaria elimination. Thus, we investigated whether griseofulvin shows anti-plasmodial activity. We observed that the intraerythrocytic growth of P...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28164040/tlr2-mice-display-increased-clearance-of-dermatophyte-trichophyton-mentagrophytes-in-the-setting-of-hyperglycemia
#4
Débora de Fátima Almeida, Thais F de Campos Fraga-Silva, Amanda R Santos, Angela C Finato, Camila M Marchetti, Marjorie de Assis Golim, Vanessa S Lara, Maria S P Arruda, James Venturini
Dermatophytosis is one of the most common human infections affecting both immunocompetent individuals and immunocompromised patients, in whom the disease is more aggressive and can reach deep tissues. Over the last decades, cases of deep dermatophytosis have increased and the dermatophyte-host interplay remains poorly investigated. Pattern recognition molecules, such as Toll-like receptors (TLR), play a crucial role against infectious diseases. However, there has been very little research reported on dermatophytosis...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28160226/molecular-diagnostic-techniques-for-onychomycosis-validity-and-potential-application
#5
Shinichi Watanabe, Kazuya Ishida
BACKGROUND: Diagnosis of onychomycosis requires positive findings by direct microscopy and fungal culture. Fungal culture is slow and difficult, with low yields. We compared two dermatophyte identification methods, one using a real-time polymerase chain reaction (PCR) method, and the other using fungal culture to validate the molecular method. METHODS: Nail specimens were collected from 149 patients with distal and lateral subungual onychomycosis who were positive for fungal elements by direct microscopy using potassium hydroxide...
February 4, 2017: American Journal of Clinical Dermatology
https://www.readbyqxmd.com/read/28149170/effectiveness-of-five-antidandruff-cosmetic-formulations-against-planktonic-cells-and-biofilms-of-dermatophytes
#6
Renan Martins Dos Santos, Marcus Vinícius Dias-Souza
This study aimed to investigate the in vitro antifungal effectiveness of five different formulations against dandruff and ringworm dermatophytes. Candida albicans was also included in our assays. Fungal susceptibility tests were performed with planktonic cells and biofilms of reference strains. Microbiological and physicochemical quality parameters were assessed for all formulations. Our data indicated that the formulations were effective against the dermatophytes strains, and to our knowledge, the effectiveness of cosmetic formulations against fungal biofilms is shown for the first time...
February 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28143403/decision-criteria-for-maldi-tof-ms-based-identification-of-filamentous-fungi-using-commercial-and-in-house-reference-databases
#7
Anne-Cécile Normand, Carole Cassagne, Magali Gautier, Pierre Becker, Stéphane Ranque, Marijke Hendrickx, Renaud Piarroux
BACKGROUND: Several Matrix-Assisted Laser Desorption/Ionization Time-of-Flight mass spectrometry protocols, which differ in identification criteria, have been developed for mold and dermatophyte identification. Currently, the most widely used approach is Bruker technology, although no consensus concerning the log(score) threshold has been established. Furthermore, it remains unknown how far increasing the number of spots to compare results might improve identification performance. In this study, we used in-house and Bruker reference databases as well as a panel of 422 isolates belonging to 126 species to test various thresholds...
January 31, 2017: BMC Microbiology
https://www.readbyqxmd.com/read/28138872/dermatophytes-and-dermatophytoses-a-thematic-overview-of-state-of-the-art-and-the-directions-for-future-research-and-developments
#8
EDITORIAL
J P Bouchara, B Mignon, V Chaturvedi
No abstract text is available yet for this article.
February 2017: Mycopathologia
https://www.readbyqxmd.com/read/28134737/dermatophytic-pseudomycetoma-of-the-scalp
#9
Eduardo Castro-Echeverry, Katherine Fiala, Martin P Fernandez
Dermatophytic pseudomycetoma represents a chronic infection characterized by a tumor-like growth containing dermatophytes arranged as clustered aggregates (grains) within the dermis. In contrast to mycetomas, they lack sinus tracts and are more common in the scalp. We describe a dermatophytic pseudomycetoma arising in the scalp of an 18-year-old African-American woman. Histopathologic examination showed a dense, mixed-cell infiltrate expanding the dermis. Accompanying this infiltrate were numerous grains scattered throughout the dermis...
February 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28116455/-dermatophyte-current-situation
#10
REVIEW
P Mayser
Currently, a mycid is defined as hyperergic reaction that develops from a remote localized infection and in which no fungus is detectable. Criteria for a mycid caused by a dermatophyte (dermatophytid) are (1) proven dermatophytosis elsewhere, (2) no evidence for fungal elements in the lesions of the -id reaction, (3) initially often worsening of the lesions under therapy with highly potent systemic antimycotics, and (4) clearing after the dermatophytosis has been treated sufficiently. The most common dermatophytid is a symmetrical dyshidrotic mycid of the hands in connection with an often highly inflammatory mycotic infection of the feet especially by Trichophyton mentagrophytes...
January 23, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28116230/cutaneous-blastomycosis-and-dermatophytic-pseudomycetoma-in-a-persian-cat-from-bangkok-thailand
#11
Lerpen Duangkaew, Lawan Larsuprom, Chaiyan Kasondorkbua, Charles Chen, Ariya Chindamporn
This is a case report of concurrent of blastomycosis and pseudomycetoma in a 3 year-old Persian cat from Bangkok, Thailand. Histopathology from antemortem and postmortem samples revealed blastomycosis and dermatophyte pseudomycetoma. The PCR analysis of the formalin-embedded tissue of antemortem sample confirmed that blastomycosis was caused by Blastomyces dermatitidis. Dermatophyte infection was caused by Microsporum canis. According to the author's knowledge, this is the first case of Blastomyces dermatitidis and dermatophyte pseudomycetoma in South-East Asia...
March 2017: Medical Mycology Case Reports
https://www.readbyqxmd.com/read/28115409/epidemiology-of-trichophyton-verrucosum-infection-in-rennes-university-hospital-france-a-12-year-retrospective-study
#12
Laura Courtellemont, Sylviane Chevrier, Brigitte Degeilh, Sorya Belaz, Jean-Pierre Gangneux, Florence Robert-Gangneux
Trichophyton verrucosum is a zoophilic dermatophyte, known as a causative agent of inflammatory mycoses of the skin and the scalp in humans. In this study, we reviewed all cases of T. verrucosum infection diagnosed in our laboratory over a 12-year period, to determine epidemiological and clinical characteristics. Among 18,340 samples analyzed, 5,186 cultured positive with dermatophytes (2674 patients), of which 64 samples (41 patients) were positive for T. verrucosum Our data show that there was a strong influence of age on the type of lesion, with children and adults presenting more frequently with tinea capitis and skin infections, respectively (P < ...
January 23, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28108868/morpho-molecular-characterization-of-soil-inhabitant-dermatophytes-from-ahvaz-southwest-of-iran-a-high-occurrence-of-microsporum-fulvum
#13
Ali Rezaei-Matehkolaei, Abbas Jahangiri, Ali Zarei Mahmoudabadi, Mohammad Javad Najafzadeh, Sadegh Nouripour-Sisakht, Koichi Makimura
Occurrence and diversity of dermatophyte mycoflora in 298 soil samples from Ahvaz, Southwest of Iran was investigated by using the hair-baiting technique. The samples were collected during spring (n = 210) and autumn (n = 88) of 2015, and the fungal isolates were identified based on the macro- and micro-morphology of colonies and with further ITS-rDNA RFLP and sequencing. Totally, 60 soil samples (20.1%) were positive for dermatophyte growth whose pH varied from 7.0 to 7.9. The highest (26.6%) and the lowest (14...
January 20, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28101694/relationship-between-phenotypic-and-genotypic-characteristics-of-trichophyton-mentagrophytes-strains-isolated-from-patients-with-dermatophytosis
#14
I Dhib, I Khammari, A Yaacoub, F Hadj Slama, M Ben Saïd, R Zemni, A Fathallah
According to epidemiological, clinical and mycological criteria, it has long been admitted that the Trichophyton mentagrophytes species includes two varieties: a zoophilic variety (var. mentagrophytes) and an anthropophilic variety (var. interdigitale) that involve the upper and the lower part of the body, respectively. The further application of molecular techniques to the characterization of dermatophyte strains showed that this classification is unreliable. The aim of our study was to assess the usefulness of PCR-RFLP (restriction fragment length polymorphism) and sequencing in the characterization of T...
January 18, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28099612/tinea-faciei-on-the-right-eyebrow-caused-by-trichophyton-interdigitale
#15
Kai Wen Zhuang, Ya Ling Dai, Yu Ping Ran, Jebina Lama, Yi Ming Fan
Tinea faciei is a relatively uncommon dermatophyte infection entailing atypical clinical symptoms, usually misdiagnosed and treated with corticosteroids. The authors describe a case of tinea faciei on the right eyebrow caused by Trichophyton interdigitale. The patient was an 18-year-old girl, who had an inflammatory plaque with a scaly, pustular surface on the right eyebrow and upper eyelid, which had persisted for over 1 month. She was once misdiagnosed as having eczema and was treated using corticosteroid cream...
November 2016: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28093309/paracoccidioides-spp-catalases-and-their-role-in-antioxidant-defense-against-host-defense-responses
#16
Diana Tamayo, José F Muñoz, Agostinho J Almeida, Juan D Puerta, Ángela Restrepo, Christina A Cuomo, Juan G McEwen, Orville Hernández
Dimorphic human pathogenic fungi interact with host effector cells resisting their microbicidal mechanisms. Yeast cells are able of surviving within the tough environment of the phagolysosome by expressing an antioxidant defense system that provides protection against host-derived reactive oxygen species (ROS). This includes the production of catalases (CATs). Here we identified and analyzed the role of CAT isoforms in Paracoccidioides, the etiological agent of paracoccidioidomycosis. Firstly, we found that one of these isoforms was absent in the closely related dimorphic pathogen Coccidioides and dermatophytes, but all of them were conserved in Paracoccidioides, Histoplasma and Blastomyces species...
January 16, 2017: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/28066103/efficacy-and-tolerability-of-topical-sertaconazole-versus-topical-terbinafine-in-localized-dermatophytosis-a-randomized-observer-blind-parallel-group-study
#17
Dattatreyo Chatterjee, Sudip Kumar Ghosh, Sukanta Sen, Saswati Sarkar, Avijit Hazra, Radharaman De
OBJECTIVE: Epidermal dermatophyte infections most commonly manifest as tinea corporis or tinea cruris. Topical azole antifungals are commonly used in their treatment but literature suggests that most require twice-daily application and provide lower cure rates than the allylamine antifungal terbinafine. We conducted a head-to-head comparison of the effectiveness of the once-daily topical azole, sertaconazole, with terbinafine in these infections. MATERIALS AND METHODS: We conducted a randomized, observer-blind, parallel group study (Clinical Trial Registry India [CTRI]/2014/09/005029) with adult patients of either sex presenting with localized lesions...
November 2016: Indian Journal of Pharmacology
https://www.readbyqxmd.com/read/28053148/inhibition-of-dermatophytes-by-photodynamic-treatment-with-curcumin
#18
Jochen Brasch, Sandra Freitag-Wolf, Vera Beck-Jendroschek, Martin Huber
Treatment of dermatophytoses with currently available antimycotic agents is often tedious and sometimes unsatisfactory. A search for better therapeutic methods-ideally with an immediate fungicidal effect-has, among others, lead to photodynamic procedures as a promising alternative, and recently curcumin was found to be a suitable agent for this application. In this study the effect of photodynamic treatment with curcumin on dermatophytes was tested in vitro Wells of microtiter plates were filled with conidia of Trichophyton rubrum, Trichophyton interdigitale, Trichophyton terrestre, Microsporum canis, Microsporum gypseum and Epidermophyton floccosum in buffer...
January 3, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28040418/-trichophyton-tonsurans-associated-with-non-albicans-candida-species-in-hands-onychomycosis-about-a-moroccan-case
#19
S Kouara, B Ait Hlilou, A Abbadi, H Khalki, I Benbella, K Lahmadi, M Er-Rami
INTRODUCTION: Trichophyton tonsurans is an anthropophilic dermatophyte, frequent in the USA and in Asia where it is responsible for causing tinea capitis. At present, we attend an emergence of this species in certain regions where it was not or little met. Here, we report a case of onychomycosis of the hand due to T. tonsurans associated with non-albicans Candida species at an adult woman. OBSERVATION: The patient is a 62-year-old woman, with hypertension and diabetes...
December 28, 2016: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28034734/preparation-and-evaluation-of-a-novel-dosage-form-for-onychomycosis
#20
Flavia Laffleur, Martin Ataii
Onychomycosis is a common infection of the nail caused by dermatophyte affecting mostly toenails in adults being associated with limited treatment options. In this study novel dosage forms were prepared and evaluated for their suitability in treatment of onychomycosis. Films were prepared comprising polymeric excipients such as chitosan, (hydroxypropyl)methyl cellulose, hydroxyethyl-cellulose, carboxymethylcellulose according to solvent evaporation method. Developed formulations were evaluated in terms of physical appearance, stability and adhesiveness...
December 26, 2016: International Journal of Pharmaceutics
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