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Sayed MA, Ghazy NM, El Sayed H, El-Bassuony AAH. Synergistic potential of essential oil combinations against Microsporum, Trichophyton, and Epidermophyton. Int Microbiol 2024:10.1007/s10123-024-00566-y. [PMID: 39186133 DOI: 10.1007/s10123-024-00566-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 05/19/2024] [Accepted: 07/31/2024] [Indexed: 08/27/2024]
Abstract
Dermatophyte infections globally account for 20 to 25% of fungal infections. Dermatophytes have begun exhibiting antifungal drug resistance, making it challenging to treat this particular infection. Essential oils could be used as alternative solutions as they have been used for a long period to treat different infections. The research has demonstrated the antifungal efficacy of cinnamon, clove, lemongrass, tea tree, thyme, and garlic essential oils, and the impact of their combinations was assayed against Microsporum canis, Trichophyton tonsurans, T. violaceum, T. verrucosum, and Epidermophyton floccosum. Polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) was used to identify the most prevalent M. canis. The accession number of M. canis was obtained as ON007275. All tested essential oils exhibited antidermatophytic action except garlic. A synergistic effect was attained by cinnamon + clove, cinnamon + lemongrass, clove + lemongrass, clove + tea tree, and thyme + tea tree combinations. Concerning antifungal activity, M. canis was the most susceptible dermatophytic species, except in the case of thyme T. violaceum, which was the most susceptible dermatophytic species. The maximum inhibition was recorded in the cases of cinnamon and cinnamon + lemongrass combination against M. canis. The least minimum inhibitory concentrations were attained by cinnamon and clove against M. canis, cinnamon + clove against M. canis and T. violaceum, and cinnamon + lemongrass against M. canis, T. violaceum, T. verrucosum, and E. floccosum. The least minimum fungicidal concentration showed by cinnamon against M. canis, cinnamon + clove against M. canis and T. violaceum, cinnamon + lemongrass against M. canis, T. violaceum, T. verrucosum, and E. floccosum, and clove + lemongrass against M. canis.
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Affiliation(s)
- Mohsen A Sayed
- Botany and Microbiology Department, Faculty of Science, Cairo University, Giza, Egypt.
| | - Nahla M Ghazy
- Botany and Microbiology Department, Faculty of Science, Cairo University, Giza, Egypt
| | - Hagar El Sayed
- Dermatology Department, Faculty of Medicine, Kasralainy School of Medicine, Cairo University, Giza, Egypt
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Faeli L, Kermani F, Rezaei-Matehkolaei A, Ilkit M, Valadan R, Hosseini SA, Javidnia J, Mayahi S, Shokohi T, Abastabar M. Molecular typing of a collection of Iranian clinical Trichophyton tonsurans isolates based on the non-transcribed spacer region of rDNA and antifungal susceptibility testing of the species. Mycoses 2024; 67:e13666. [PMID: 37941162 DOI: 10.1111/myc.13666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 10/16/2023] [Indexed: 11/10/2023]
Abstract
INTRODUCTION Wrestling, considered the national sport of Iran, has gained immense popularity among Iranians. Wrestlers frequently encounter skin conditions, with dermatophyte fungal infections, particularly tinea gladiatorum (TG), being a common issue. TG, caused by the Trichophyton genus, has emerged as a major health concern for wrestlers and other contact sport athletes worldwide. This study aimed to assess the genotypic diversity and antifungal susceptibility of Trichophyton tonsurans isolates responsible for TG in Iranian wrestlers from Mazandaran province, northern Iran. MATERIALS AND METHODS A total of 60 clinical T. tonsurans isolates collected from various cities in Mazandaran, were included in the study. The isolates were identified through PCR-restriction fragment length polymorphism and sequencing methods. Genomic DNA was extracted from these isolates, and the non-transcribed spacer (NTS) region of ribosomal RNA (rRNA) was targeted for genotyping using newly designed primers. Haplotype analysis was performed to explore genetic diversity, and antifungal susceptibility to terbinafine (TRB) and itraconazole (ITC) was assessed. RESULTS The results revealed five distinct NTS types: NTS-I, NTS-II, NTS-III, NTS-IV and NTS-V, with NTS-IV being the most prevalent. The distribution of NTS types varied across different cities, suggesting potential transmission patterns among wrestlers. Antifungal susceptibility testing showed that all isolates were susceptible to TRB, while one isolate demonstrated resistance to ITC. Genotypic diversity was not correlated with antifungal susceptibility, emphasising the importance of monitoring susceptibility to ensure effective treatment. Haplotype analysis highlighted significant genetic diversity among the T. tonsurans isolates. This diversity may be attributed to factors such as human-to-human transmission, geographic location and lifestyle changes. The study's findings underscore the need for comprehensive genotypic analysis to understand the epidemiology and evolution of T. tonsurans infections in athletes. CONCLUSION In conclusion, this study provides valuable insights into the genotypic diversity and antifungal susceptibility of T. tonsurans isolates causing TG in Iranian wrestlers. The presence of multiple NTS types and varying susceptibility patterns highlights the complexity of T. tonsurans infections in this population. Further research is warranted to track the transmission routes and genetic evolution of T. tonsurans strains among wrestlers and develop effective control measures.
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Affiliation(s)
- Leila Faeli
- Invasive Fungi Research Centre (IFRC), Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran
- Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Firoozeh Kermani
- Infectious Disease and Tropical Medicine Research Center, Health Research Institute, Babol University of Medical Sciences, Babol, Iran
| | - Ali Rezaei-Matehkolaei
- Department of Medical Mycology, School of Medicine, Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Macit Ilkit
- Division of Mycology, Department of Microbiology, Faculty of Medicine, University of Cukurova, Adana
| | - Reza Valadan
- Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Seyed Abdollah Hosseini
- Toxoplasmosis Research Center, Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran
| | - Javad Javidnia
- Invasive Fungi Research Centre (IFRC), Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran
- Student Research Committee, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Sabah Mayahi
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Tahereh Shokohi
- Invasive Fungi Research Centre (IFRC), Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Mahdi Abastabar
- Invasive Fungi Research Centre (IFRC), Communicable Diseases Institute, Mazandaran University of Medical Sciences, Sari, Iran
- Department of Medical Mycology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
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Kottferová L, Molnár L, Major P, Sesztáková E, Kuzyšinová K, Vrabec V, Kottferová J. Hedgehog Dermatophytosis: Understanding Trichophyton erinacei Infection in Pet Hedgehogs and Its Implications for Human Health. J Fungi (Basel) 2023; 9:1132. [PMID: 38132733 PMCID: PMC10744110 DOI: 10.3390/jof9121132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/17/2023] [Accepted: 11/20/2023] [Indexed: 12/23/2023] Open
Abstract
Pet hedgehogs, which are increasingly favoured companions, have garnered attention due to their potential as carriers of zoonotic diseases. These small insectivorous mammals, native to Europe, Asia, and Africa, are commonly kept as pets. The encroachment of humans into hedgehog habitats has brought these animals closer to people, raising concerns about disease transmission. This article reviews the current knowledge regarding zoonotic disease associated with pet hedgehogs, with a particular focus on mycotic infections caused by Trichophyton erinacei. Data from various regions and hedgehog species are synthesised to assess the significance of pet hedgehogs as potential reservoirs and transmitters of zoonotic pathogens. Our study highlights the importance of understanding the health risks associated with pet hedgehogs and underscores the need for continued research to mitigate zoonotic disease transmission from these potentially disease-carrying companions.
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Affiliation(s)
- Lucia Kottferová
- Clinic of Birds, Exotic and Free Living Animals, University of Veterinary Medicine and Pharmacy, Komenského 73, 04181 Košice, Slovakia; (L.K.); (L.M.); (E.S.); (K.K.); (V.V.)
| | - Ladislav Molnár
- Clinic of Birds, Exotic and Free Living Animals, University of Veterinary Medicine and Pharmacy, Komenského 73, 04181 Košice, Slovakia; (L.K.); (L.M.); (E.S.); (K.K.); (V.V.)
| | - Peter Major
- Clinic of Birds, Exotic and Free Living Animals, University of Veterinary Medicine and Pharmacy, Komenského 73, 04181 Košice, Slovakia; (L.K.); (L.M.); (E.S.); (K.K.); (V.V.)
| | - Edina Sesztáková
- Clinic of Birds, Exotic and Free Living Animals, University of Veterinary Medicine and Pharmacy, Komenského 73, 04181 Košice, Slovakia; (L.K.); (L.M.); (E.S.); (K.K.); (V.V.)
| | - Katarína Kuzyšinová
- Clinic of Birds, Exotic and Free Living Animals, University of Veterinary Medicine and Pharmacy, Komenského 73, 04181 Košice, Slovakia; (L.K.); (L.M.); (E.S.); (K.K.); (V.V.)
| | - Vladimír Vrabec
- Clinic of Birds, Exotic and Free Living Animals, University of Veterinary Medicine and Pharmacy, Komenského 73, 04181 Košice, Slovakia; (L.K.); (L.M.); (E.S.); (K.K.); (V.V.)
| | - Jana Kottferová
- Department of Public Veterinary Medicine and Animal Welfare, University of Veterinary Medicine and Pharmacy, Komenského 73, 04181 Košice, Slovakia;
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Borba OSM, Ogawa MM, Kirsztajn GM, Tomimori J. Onychomycosis in immunocompromised population: Phenotypic and molecular identification. Mycoses 2023; 66:1018-1024. [PMID: 37488648 DOI: 10.1111/myc.13634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 06/30/2023] [Accepted: 07/16/2023] [Indexed: 07/26/2023]
Abstract
Onychomycosis is common among immunosuppressed individuals. Renal transplant recipients (RTR) and lupus nephritis (LN) patients are submitted to corticosteroid and other immunosuppressive therapy; and diabetes mellitus (DM) patients are intrinsically immunocompromised. OBJECTIVES The aim of this study was to characterise and identify fungal infections on the nails (feet and hands) in immunocompromised patients. METHODS The clinical material, nail scales (foot and/or hand), was collected from 47 RTR, 66 LN, 67 DM, and 78 immunocompetent individuals (control group). Phenotypic and molecular analyses were performed. RESULTS A total of 258 patients were examined. There was a female predominance, except in the RTR. The average age was 52 years old. Lateral distal subungual onychomycosis (OSDL) (75.2%), mainly affecting the hallux nail, was frequent. The predominance of dermatophyte on toenails and Candida species on fingernails was statistically significant. A higher frequency of fingernail involvement in LN and DM, and for LN, the difference was significant (p = .0456). Infections by Candida spp. were more frequent in DM. Using molecular methods, 87.2% of diagnoses were confirmed, identifying fungal agents at the species level. Dermatophytes, Trichophyton rubrum and Trichophyton interdigitale and the species of Candida, C. parapsilosis and C. albicans, were the most frequent fungal agents. CONCLUSIONS Molecular techniques (sequencing of ITS regions of rDNA) offer greater accuracy, although there is no difference, regarding the detection. Clinical presentation and fungal species may differ somewhat from the general population. Immunosuppression did not increase fungal detection positivity.
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Affiliation(s)
- Orion Sant'Anna Motter Borba
- Program in Translational Medicine, Department of Medicine, Laboratory of Cellular Biology, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Marilia Marufuji Ogawa
- Department of Dermatology, Hospital São Paulo, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Gianna Mastroianni Kirsztajn
- Discipline of Nephrology, Hospital São Paulo, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Jane Tomimori
- Department of Dermatology, Hospital São Paulo, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil
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Kumar M, Thomas P, V A, Nair SS, Bagra JK, Chaturvedi VK, Kumar B, Kumar A, Rudramurthy SM, Abhishek. Molecular epidemiology of Trichophyton infections among canines from Northern India. J Mycol Med 2023; 33:101352. [PMID: 36459816 DOI: 10.1016/j.mycmed.2022.101352] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 11/14/2022] [Accepted: 11/15/2022] [Indexed: 11/23/2022]
Abstract
Dermatophytes are keratinophilic fungi that cause skin infections in both humans and animals. Recently, the incidence rates of fungal infections associated with Trichophyton spp. have been considered endemic in many locations. The aim of this study was to isolate and characterize Trichophyton spp. from canines and felines. In the present study, screened 442 canine (n = 386) and feline (n = 56) samples for dermatophytes. Among all the samples, ten isolates were identified as Trichophyton spp. based on micro-morphological features. For comparative analysis, we included three human strains of Trichophyton mentagrophytes complex. In vitro susceptibility of antifungal drugs indicated the highest sensitivity except for fluconazole. The canine and human strains were genetically characterized by sequencing three genes: the internal transcribed spacer region of rDNA, translation elongation factor 1- gene, and beta-tubulin. Based on sequence homology and phylogenetic analysis, the ten canine strains belonged to four different species/ genotypes such as T. mentagrophytes genotype VIII (T. indotineae) (n = 5), T. interdigitale (n = 2), T. simii (n = 2) and T. quinckeanum (n = 1). The three human strains used for comparative analysis were identified as T. mentagrophytes genotype VIII (n = 2) and T. benhamiae (n = 1). The study hence indicates that the T. mentagrophytes genotype VIII, considered as an endemic and emerging human pathogenic clone in India, is also the prevalent in animals.
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Affiliation(s)
- Manish Kumar
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Izatnagar, Bareilly, India
| | - Prasad Thomas
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Izatnagar, Bareilly, India
| | - Athira V
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Izatnagar, Bareilly, India
| | - Sonu S Nair
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Izatnagar, Bareilly, India
| | - Jitendra Kumar Bagra
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Izatnagar, Bareilly, India
| | - V K Chaturvedi
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Izatnagar, Bareilly, India
| | - Bablu Kumar
- Division of Biological Products, Indian Veterinary Research Institute, Izatnagar, Bareilly, India
| | - Akhilesh Kumar
- Division of Medicine, Indian Veterinary Research Institute, Izatnagar, Bareilly, India
| | | | - Abhishek
- Division of Bacteriology and Mycology, Indian Veterinary Research Institute, Izatnagar, Bareilly, India.
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Ma Y, Deng W, Zhang K, Song Y, Zhang L, Shao J, Liu X, Wan Z, Wang X, Li R. Dual RNA-Sequencing and Liquid Chromatography-Mass Spectrometry Unveil Specific Insights on the Pathogenicity of Trichophyton mentagrophytes Complex. J Invest Dermatol 2023; 143:470-479.e6. [PMID: 38295003 DOI: 10.1016/j.jid.2022.08.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 07/29/2022] [Accepted: 08/09/2022] [Indexed: 11/22/2022]
Abstract
Trichophyton mentagrophytes is increasingly considered to be a public health hazard because it causes the most severe manifestations of dermatophytosis. In this study, we performed a series of studies to determine the pathogenicity of the T. mentagrophytes complex. We show that the T. mentagrophytes complex interacts with keratinocytes through pattern-recognition receptors‒MAPK/noncanonical NF-κB pathways and that the hyphal form of T. mentagrophytes is responsible for the increased inflammatory responses in keratinocytes. Moreover, SN-38 is likely a toxin of T. mentagrophytes that induces apoptosis in keratinocytes both in vivo and in vitro. Our results explain the severe pathogenicity and destructiveness of T. mentagrophytes observed in the clinic and pave the way for designing novel toxin-directed therapies to improve patient outcomes.
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Affiliation(s)
- Yubo Ma
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Research Center for Medical Mycology, Peking University, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Weiwei Deng
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Research Center for Medical Mycology, Peking University, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Kai Zhang
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Research Center for Medical Mycology, Peking University, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Yinggai Song
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Research Center for Medical Mycology, Peking University, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Lu Zhang
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Research Center for Medical Mycology, Peking University, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Jin Shao
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Research Center for Medical Mycology, Peking University, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Xiao Liu
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Research Center for Medical Mycology, Peking University, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Zhe Wan
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Research Center for Medical Mycology, Peking University, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Xiaowen Wang
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Research Center for Medical Mycology, Peking University, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China
| | - Ruoyu Li
- Department of Dermatology and Venerology, Peking University First Hospital, Beijing, China; Research Center for Medical Mycology, Peking University, Beijing, China; Beijing Key Laboratory of Molecular Diagnosis on Dermatoses, Beijing, China; National Clinical Research Center for Skin and Immune Diseases, Beijing, China.
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Müs Tak HK, Ünal G, Müs Tak INBA. Detection of Microsporum canis and Trichophyton mentagrophytes by loop-mediated isothermal amplification (LAMP) and real-time quantitative PCR (qPCR) methods. Vet Dermatol 2022; 33:516-522. [PMID: 36000592 DOI: 10.1111/vde.13111] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 06/03/2022] [Accepted: 06/16/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Dermatophytes are infectious zoonotic fungal agents that are common in animals worldwide. A new loop-mediated isothermal amplification (LAMP) method and quantitative (q)PCR can be used for identifying these agents. Both methods have high specificity and sensitivity, and are simple and quick to use. HYPOTHESIS/OBJECTIVES To develop a LAMP and a rapid multiplex qPCR method for detecting Microsporum canis and Trichophyton mentagrophytes, which are the most common fungal species isolated from cats and dogs. MATERIAL AND METHODS Both methods targeted the CHS-1 gene. Their specificity and sensitivity were tested using 64 M. canis and 44 T. mentagrophytes field strains. The validation of the methods was performed using 250 clinical fungal-positive hair samples. RESULTS The specificity value was 100% for both methods. For LAMP, the sensitivity value was 96.9% for M. canis and 93.2% for T. mentagrophytes. For qPCR, the sensitivity values were 98.4% for M. canis and 97.7% for T. mentagrophytes. Similar specificity and sensitivity results were obtained from the validation study using 250 clinical hair samples. LAMP and multiplex qPCR took 30 and 45 min (respectively) for both targets. The limit of detection (LOD) assays for both targets were 10 and 1 spore/mL for LAMP and multiplex qPCR, respectively. CONCLUSION These findings demonstrate that the LAMP and multiplex qPCR methods targeting CHS-1 gene developed in this study can be used both for point-of-care testing and in the laboratory for detecting M. canis and T. mentagrophytes with high specificity and sensitivity with an internal control.
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Affiliation(s)
- Hamit Kaan Müs Tak
- Ankara University Faculty of Veterinary Medicine, Department of Microbiology, Ankara, Turkey
| | - Gültekin Ünal
- Ankara University Faculty of Veterinary Medicine, Department of Microbiology, Ankara, Turkey
| | - I Nci Bas Ak Müs Tak
- Ankara University Faculty of Veterinary Medicine, Department of Microbiology, Ankara, Turkey
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Osman M, Kasir D, Rafei R, Kassem II, Ismail MB, El Omari K, Dabboussi F, Cazer C, Papon N, Bouchara JP, Hamze M. Trends in the epidemiology of dermatophytosis in the Middle East and North Africa region. Int J Dermatol 2021; 61:935-968. [PMID: 34766622 DOI: 10.1111/ijd.15967] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 08/31/2021] [Accepted: 10/15/2021] [Indexed: 12/28/2022]
Abstract
Dermatophytosis corresponds to a broad series of infections, mostly superficial, caused by a group of keratinophilic and keratinolytic filamentous fungi called dermatophytes. These mycoses are currently considered to be a major public health concern worldwide, particularly in developing countries such as those in the Middle East and North Africa (MENA) region. Here we compiled and discussed existing epidemiologic data on these infections in the MENA region. Most of the available studies were based on conventional diagnostic strategies and were published before the last taxonomic revision of dermatophytes. This has led to misidentifications, which might have resulted in the underestimation of the real burden of these infections in the MENA countries. Our analysis of the available literature highlights an urgent need for further studies based on reliable diagnostic tools and standard susceptibility testing methods for dermatophytosis, which represents a major challenge for these countries. This is crucial for guiding appropriate interventions and activating antifungal stewardship programs in the future.
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Affiliation(s)
- Marwan Osman
- Laboratoire Microbiologie Santé et Environnement (LMSE), Doctoral School of Sciences and Technology, Faculty of Public Health, Lebanese University, Tripoli, Lebanon.,Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Dalal Kasir
- Laboratoire Microbiologie Santé et Environnement (LMSE), Doctoral School of Sciences and Technology, Faculty of Public Health, Lebanese University, Tripoli, Lebanon
| | - Rayane Rafei
- Laboratoire Microbiologie Santé et Environnement (LMSE), Doctoral School of Sciences and Technology, Faculty of Public Health, Lebanese University, Tripoli, Lebanon
| | - Issmat I Kassem
- Center for Food Safety and Department of Food Science and Technology, University of Georgia, Griffin, GA, USA
| | - Mohamad Bachar Ismail
- Laboratoire Microbiologie Santé et Environnement (LMSE), Doctoral School of Sciences and Technology, Faculty of Public Health, Lebanese University, Tripoli, Lebanon.,Faculty of Science, Lebanese University, Tripoli, Lebanon
| | - Khaled El Omari
- Laboratoire Microbiologie Santé et Environnement (LMSE), Doctoral School of Sciences and Technology, Faculty of Public Health, Lebanese University, Tripoli, Lebanon.,Quality Control Center Laboratories, Chamber of Commerce, Industry, and Agriculture of Tripoli and North Lebanon, Tripoli, Lebanon
| | - Fouad Dabboussi
- Laboratoire Microbiologie Santé et Environnement (LMSE), Doctoral School of Sciences and Technology, Faculty of Public Health, Lebanese University, Tripoli, Lebanon
| | - Casey Cazer
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Nicolas Papon
- Univ Angers, Univ Brest, GEIHP, SFR ICAT, Angers, France
| | | | - Monzer Hamze
- Laboratoire Microbiologie Santé et Environnement (LMSE), Doctoral School of Sciences and Technology, Faculty of Public Health, Lebanese University, Tripoli, Lebanon
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Salehi Z, Shams-Ghahfarokhi M, Razzaghi-Abyaneh M. Molecular Epidemiology, Genetic Diversity, and Antifungal Susceptibility of Major Pathogenic Dermatophytes Isolated From Human Dermatophytosis. Front Microbiol 2021; 12:643509. [PMID: 34149634 PMCID: PMC8213211 DOI: 10.3389/fmicb.2021.643509] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 04/19/2021] [Indexed: 12/16/2022] Open
Abstract
Background Dermatophytes are a homogeneous group of species with low genetic diversity, and there are still many uncertainties about the boundaries among species. Objectives Aiming at clarifying the relationships among species in the genus and introducing suitable genes for multilocus sequence typing (MLST), a new MLST scheme approach was developed to characterize the major pathogenic dermatophytes. Methods We performed maximum parsimony (MP), MrBayes, RAxML, and eBURST analyses, based on the MLST scheme to scrutinize the evolution within 95 clinical isolates and four reference strains belonging to the four major dermatophytes species. Then, the discriminatory power, pairwise genetic distances, ratio dN/dS, and sequence types (STs) of these isolates were determined. Also, to study taxonomy, sequences of the internal transcribed spacer (ITS), Beta-tubulin (BT2), and translation elongation factor 1-α (TEF-1α) genes of other dermatophytes species available in the GenBank were analyzed. Results Findings of the present study indicated that three genes: BT2, ITS, and TEF−1α, which showed the greatest diversity among dermatophyte species, were suitable for MLST. The most prevalent STs were seen among the species of Trichophyton interdigitale. Also, two new genotypes, i.e., XXVII and XXVIII, were introduced for T. interdigitale and Trichophyton mentagrophytes. The least informative sites were found in Epidermophyton floccosum, Trichophyton rubrum, and T. mentagrophytes, while the most informative sites were observed in T. interdigitale. Furthermore, the most informative locus was TEF-1α. The phylogenetic tree, constructed by the combination of the three genes, shows a new topological pattern that confirms the derivation of the anthropophilic and zoophilic genera from the geophilic genus. Also, the phylogenetic analyses and pairwise distances of the combination of the three loci showed that Trichophyton tonsurans and Trichophyton equinum were a species complex, where T. equinum is derived from T. tonsurans. Conclusions Results of this study showed that MLST is very effective in determining the boundaries between species and taxonomy. Considering that there is no database for MLST dermatophytes, further studies are needed to determine the suitable genes for MLST. Also, the determination of STs in epidemiological studies and raising epidemiological information are helpful. This study was a new starting point to determine the ST and a foundation for a dermatophyte MLST database.
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Affiliation(s)
- Zahra Salehi
- Department of Mycology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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10
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Araya S, Abuye M, Negesso AE. Epidemiological Characterization of Dermatomycosis in Ethiopia. Clin Cosmet Investig Dermatol 2021; 14:83-89. [PMID: 33519223 PMCID: PMC7837531 DOI: 10.2147/ccid.s292286] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 12/30/2020] [Indexed: 12/24/2022]
Abstract
Background Superficial mycosis is common worldwide and their epidemiological characteristics are different in different geographical areas and have shown variations in the last decades. The aim of this study was to analyze and characterize the epidemiology of dermatomycosis and their causative fungi species in Ethiopia between 2015 and 2019. Methods A laboratory-based cross-sectional study was conducted using the data of mycological examination and culture findings from all patients who visited the Dermatology Department of Arsho Advanced Medical Laboratory, Addis Ababa, Ethiopia. The direct wet mount microscopy and culture data of the isolates were collected from the database of the dermatology unit from 2015 to 2019 after permission was obtained from the laboratory head. The data were double-entered into Microsoft Excel, exported and analyzed using SPSS version 20. Results The total prevalence of fungi causing dermatomycosis was 67.7% (760/1122 cases) using direct wet mount microscopy and from these 489/1122 (43.5%) were culture positive. Dermatomycosis was found to be higher among females 694/1122 (61.9%) than male participants. Age group 25–44 years was the most affected 442/1122 (39.4%) followed by 1–14 years old 291/1122 (25.94%). Tinea unguium (50.8%) is the most common type of dermatomycosis followed by tinea capitis (24.1%) and tinea corporis (13.9%). Trichophyton spp. (32%) was the most highly distributed causative agent, followed by Epidermophyton spp. (20.2%) and Aspergillus fumigatus (8.3%). Conclusion The retrospective analysis of epidemiological data collected at Arsho Advanced Medical Laboratory since 2015 showed a gradual increase in the frequency of tinea unguium and tinea pedis. However, during the past years, there was a gradual decline in the frequency of tinea corporis. In parallel with this variable pattern, the rate of isolation of non-dermatophytes especially Aspergillus fumigates and Candida species has shown a gradual increment during the past five years.
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Affiliation(s)
- Shambel Araya
- Addis Ababa University College of Health Sciences, Department of Medical Laboratory Sciences, Addis Ababa, Ethiopia
| | - Million Abuye
- Addis Ababa University College of Health Sciences, Department of Medical Laboratory Sciences, Addis Ababa, Ethiopia
| | - Abebe Edao Negesso
- Addis Ababa University College of Health Sciences, Department of Medical Laboratory Sciences, Addis Ababa, Ethiopia
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11
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Celestrino GA, Verrinder Veasey J, Benard G, Sousa MGT. Host immune responses in dermatophytes infection. Mycoses 2021; 64:477-483. [PMID: 33480106 DOI: 10.1111/myc.13246] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 01/11/2021] [Accepted: 01/12/2021] [Indexed: 01/07/2023]
Abstract
Dermatophytosis is a skin infection caused by keratinophilic, filamentous fungi. These are highly prevalent, common mycoses, affecting approximately 20% of the population. These fungi invade the stratum corneum, and other keratinised tissues, like nails and hair, where they grow by secreting enzymes and degrading keratin to obtain nutrients. Clinical presentation is variable and may depend on many factors, such as the infection site, the host's immunity and the dermatophyte's virulence. Generally, patients with acute superficial dermatophytosis mount cell-mediated immune responses. However, those suffering from chronic or recurrent infections are unable to develop this response, for reasons yet unknown. Several reports have described severe and occasionally life-threatening invasive diseases (deep dermatophytosis) associated with genetic mutations in the innate immunity-associated molecule CARD9, displaying the need to better understand its immune response. These dermatoses have substantial clinical consequences, producing chronic and difficult to treat skin lesions. They also lead to a decline in the patient's quality of life and impact their self-esteem. This review summarises findings on the immune response against dermatophytes.
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Affiliation(s)
- Giovanna Azevedo Celestrino
- Laboratório de Micologia Médica - LIM-53, Divisão de Dermatologia Clínica, Faculdade de Medicina, Hospital das Clínicas and Instituto de Medicina Tropical de São Paulo, USP, São Paulo, Brazil
| | | | - Gil Benard
- Laboratório de Micologia Médica - LIM-53, Divisão de Dermatologia Clínica, Faculdade de Medicina, Hospital das Clínicas and Instituto de Medicina Tropical de São Paulo, USP, São Paulo, Brazil
| | - Maria Glória Teixeira Sousa
- Laboratório de Micologia Médica - LIM-53, Divisão de Dermatologia Clínica, Faculdade de Medicina, Hospital das Clínicas and Instituto de Medicina Tropical de São Paulo, USP, São Paulo, Brazil
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12
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Burstein VL, Beccacece I, Guasconi L, Mena CJ, Cervi L, Chiapello LS. Skin Immunity to Dermatophytes: From Experimental Infection Models to Human Disease. Front Immunol 2020; 11:605644. [PMID: 33343578 PMCID: PMC7738607 DOI: 10.3389/fimmu.2020.605644] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Accepted: 11/03/2020] [Indexed: 12/18/2022] Open
Abstract
Dermatophytoses (ringworms) are among the most frequent skin infections and are a highly prevalent cause of human disease worldwide. Despite the incidence of these superficial mycoses in healthy people and the compelling evidence on chronic and deep infections in immunocompromised individuals, the mechanisms controlling dermatophyte invasion in the skin are scarcely known. In the last years, the association between certain primary immunodeficiencies and the susceptibility to severe dermatophytosis as well as the evidence provided by novel experimental models mimicking human disease have significantly contributed to deciphering the basic immunological mechanisms against dermatophytes. In this review, we outline the current knowledge on fungal virulence factors involved in the pathogenesis of dermatophytoses and recent evidence from human infections and experimental models that shed light on the cells and molecules involved in the antifungal cutaneous immune response. The latest highlights emphasize the contribution of C-type lectin receptors signaling and the cellular immune response mediated by IL-17 and IFN-γ in the anti-dermatophytic defense and skin inflammation control.
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Affiliation(s)
- Verónica L. Burstein
- Laboratorio de Parasitología y Micología Experimental. Departamento de Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
| | - Ignacio Beccacece
- Laboratorio de Parasitología y Micología Experimental. Departamento de Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
| | - Lorena Guasconi
- Laboratorio de Parasitología y Micología Experimental. Departamento de Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
| | - Cristian J. Mena
- Laboratorio de Parasitología y Micología Experimental. Departamento de Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
| | - Laura Cervi
- Laboratorio de Parasitología y Micología Experimental. Departamento de Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
| | - Laura S. Chiapello
- Laboratorio de Parasitología y Micología Experimental. Departamento de Bioquímica Clínica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
- Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Córdoba, Argentina
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Gnat S, Łagowski D, Nowakiewicz A, Osińska M, Kopiński Ł. Population differentiation, antifungal susceptibility, and host range of Trichophyton mentagrophytes isolates causing recalcitrant infections in humans and animals. Eur J Clin Microbiol Infect Dis 2020; 39:2099-2113. [PMID: 32607909 PMCID: PMC7561545 DOI: 10.1007/s10096-020-03952-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Accepted: 06/10/2020] [Indexed: 02/05/2023]
Abstract
The major problems in determining the causative factors of the high prevalence of dermatophytoses include the lack of a well-standardized antifungal susceptibility testing method, the low consistency of in vitro and clinical minimal inhibitory concentration values, the high genomic diversity of the population, and the unclear mechanism of pathogenicity. These factors are of particular importance when the disease is recalcitrant and relapses. Herein, we identified and characterized Trichophyton mentagrophytes isolates obtained from therapy-resistant cases in humans and animals. We used genomic diversity analysis of 17 human and 27 animal clinical isolates with the MP-PCR technique, determined their phenotypic enzymatic activity and host range, and performed antifungal susceptibility testing to currently available antifungal drugs from various chemical groups. Genomic diversity values of 35.3% and 33.3% were obtained for clinical isolates from humans and animals, respectively, yet without any relationship to the host species or antifungal drug to which resistance in therapy was revealed. The highest activity of keratinase enzymes was recorded for fox, guinea pig, and human hairs. These hosts can be considered as the main species in the host range of these isolates. A phenyl morpholine derivative, i.e. amorolfine, exhibited superior activity against strains obtained from both humans and animals with the lowest MIC50. Interestingly, high compliance of terbinafine in vitro resistance with clinical problems in the treatment with this substance was shown as well. The high resistance of dermatophytes to drugs is the main cause of the recalcitrance of the infection, whereas the other features of the fungus are less important.
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Affiliation(s)
- Sebastian Gnat
- Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, Department of Veterinary Microbiology, University of Life Sciences, Akademicka 12, 20-033, Lublin, Poland.
| | - Dominik Łagowski
- Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, Department of Veterinary Microbiology, University of Life Sciences, Akademicka 12, 20-033, Lublin, Poland.
| | - Aneta Nowakiewicz
- Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, Department of Veterinary Microbiology, University of Life Sciences, Akademicka 12, 20-033, Lublin, Poland
| | - Marcelina Osińska
- Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, Department of Veterinary Microbiology, University of Life Sciences, Akademicka 12, 20-033, Lublin, Poland
| | - Łukasz Kopiński
- Faculty of Agrobioengineering, Department of Management and Marketing, University of Life Sciences, Dobrzanskiego 37, 20-626, Lublin, Poland
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14
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Gnat S, Łagowski D, Nowakiewicz A, Osińska M, Dyląg M. Identification of emerging trends in the prevalence of dermatophytoses in alpacas (Vicugna pacos) farmed in Poland. Transbound Emerg Dis 2020; 67:2702-2712. [PMID: 32406160 DOI: 10.1111/tbed.13624] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 03/26/2020] [Accepted: 05/06/2020] [Indexed: 12/24/2022]
Abstract
The increasing number of dermatophytoses among animals observed recently in developed countries may be connected with relocation of many exotic species outside their natural living environment. Moreover, an impact on this situation may also be exerted by relapses related to limited compliance with antifungal treatment regimes. Many exotic animals, including camelids, imported to European countries are connected with cases of tuberculosis or zoophilic dermatophytoses in humans. In the present study, we identified and comprehensively analysed dermatophyte infections in alpacas from breeding farms in Poland. As part of this study, we determined the prevalence of dermatophyte infections in alpacas. The conventional and molecular mycological diagnostic procedures applied led to unambiguous identification of the aetiological factors of symptomatic dermatophytoses and asymptomatic animals, that is Trichophyton benhamiae and T. verrucosum. Furthermore, the susceptibility tests allowed choosing the best therapeutic option and revealed superior activity of allylamine drugs against all strains. Finally, in the case of strains isolated from symptomatic dermatophytoses, our study revealed a significantly higher virulence level expressed by high activity of chosen enzymes, especially related to keratinolytic and haemolytic activity. In conclusion, this report indicates that farmed alpacas can be a reservoir or vector for contagious zoophilic dermatophyte infection. For this reason, imported animals should be subjected to meticulous monitoring to detect not only symptomatic infections but also asymptomatic animals.
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Affiliation(s)
- Sebastian Gnat
- Department of Veterinary Microbiology, Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, University of Life Sciences, Lublin, Poland
| | - Dominik Łagowski
- Department of Veterinary Microbiology, Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, University of Life Sciences, Lublin, Poland
| | - Aneta Nowakiewicz
- Department of Veterinary Microbiology, Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, University of Life Sciences, Lublin, Poland
| | - Marcelina Osińska
- Department of Veterinary Microbiology, Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, University of Life Sciences, Lublin, Poland
| | - Mariusz Dyląg
- Department of Mycology and Genetics, Faculty of Biological Sciences, Institute of Genetics and Microbiology, University of Wroclaw, Wroclaw, Poland
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15
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Vieille Oyarzo P, Cruz Choappa R, Álvarez Duarte E. [Morphological and molecular differentiation by high resolution melting curves (HRMA) and sequencing of the Trichophyton mentagrophytes complex in human strains in Valparaíso, Chile]. Rev Argent Microbiol 2020; 52:88-95. [PMID: 31350016 DOI: 10.1016/j.ram.2019.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/08/2019] [Accepted: 05/04/2019] [Indexed: 11/25/2022] Open
Abstract
Trichophyton mentagrophytes complex is the most frequent agent found in dermatophyte isolates after Trichophyton rubrum. It is divided into 3main groups: (1) Trichophyton benhamiae and related species; (2) Trichophyton simii and 2related species, Trichophyton quinckeanum and Trichophyton schoenleinii; and (3) T. mentagrophytes, T. interdigitale, and related species. They are all difficult to identify by morphophysiology. With the aim of classifying them at the species level, a descriptive study was performed on 17 isolated clinical strains identified in the Mycology Laboratory of the Universidad de Valparaíso as belonging to the T. mentagrophytes complex. They were compared with 3 reference strains (T. mentagrophytes CBS 318.56, T. interdigitale CBS 428.63, Trichophyton erinacei CBS 511.73). Morphophysiological and molecular tests were performed by high resolution melting analysis curves and ITS regions sequencing. Phenotypically, 3 species of the complex were identified. Molecular analyses reclassified all the species as belonging to T. interdigitale. In conclusion, no reliable morphophysiological patterns were established to differentiate between the species of the complex. Molecularly, all the strains studied were classified as T. interdigitale.
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Affiliation(s)
| | | | - Eduardo Álvarez Duarte
- Unidad de Micología, Instituto de Ciencias Biomédicas, Universidad de Chile, Santiago, Chile
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16
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Thakur R, Kalsi AS. Outbreaks And Epidemics Of Superficial Dermatophytosis Due To Trichophyton mentagrophytes Complex And Microsporum canis: Global And Indian Scenario. Clin Cosmet Investig Dermatol 2019; 12:887-893. [PMID: 31849509 PMCID: PMC6913057 DOI: 10.2147/ccid.s220849] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 10/29/2019] [Indexed: 12/27/2022]
Abstract
Until recently, superficial dermatophytosis, also known as tinea, was considered as a minor skin infection, which was easy to treat. There used to be rare outbreaks and epidemics of superficial dermatophytosis. Lately, there is a sweeping change in the clinical presentation due to extensive, atypical and recalcitrant dermatophytosis. Treating such infections poses a great challenge to the clinicians. Dermatophytosis is a superficial fungal infection of keratinized tissue (skin, hairs and nails) by dermatophytes (fungus). It is caused by the three genera of dermatophytes: Trichophyton, Epidermophyton and Microsporum. The conventional methods of laboratory diagnosis have now been substantiated by molecular characterization. Earlier epidemics were usually due to anthropophilic dermatophytes. Now, zoophilic dermatophytes are also responsible for many outbreaks and epidemics. We need to be equipped with the tools to face the current scenario, because this depends upon the competence of the staff working in the state-of-the-art laboratories, which is needed for the study of the epidemiology and appropriate treatment.
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Affiliation(s)
- Rameshwari Thakur
- Department of Dermatology and Microbiology, Muzaffarnagar Medical College and Hospital, Chaudhary Charan Singh University, Meerut, India
| | - Avneet Singh Kalsi
- Department of Dermatology and Microbiology, Muzaffarnagar Medical College and Hospital, Chaudhary Charan Singh University, Meerut, India
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17
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Peng Y, Zhang Q, Xu C, Shi W. MALDI-TOF MS for the rapid identification and drug susceptibility testing of filamentous fungi. Exp Ther Med 2019; 18:4865-4873. [PMID: 31819764 PMCID: PMC6895777 DOI: 10.3892/etm.2019.8118] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 09/24/2019] [Indexed: 01/07/2023] Open
Abstract
The present study aimed to evaluate the applicability of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) for identifying filamentous fungi and assessing the in vitro activities of common antifungal drugs against different kinds of filamentous fungi that are commonly encountered in a clinical setting. A total of 123 strains of filamentous fungi (24 species) were submitted for identification by MALDI-TOF MS, and the findings were compared with those obtained by conventional methods. The discrepancies were further investigated by internal transcribed spacer (ITS) sequence analysis. Then, 79 strains were randomly selected for further testing by the minimum inhibitory concentration Etest method. MALDI-TOF MS correctly identified 114 (92.70%) of the 123 filamentous fungi and failed to identify six isolates (4.9%). By contrast, the conventional identification methods made 113 (91.9%) correct identifications. In addition, 15 isolates of filamentous fungi were further identified by ribosomal DNA-ITS sequencing. In the in vitro antifungal susceptibility test, voriconazole showed the strongest antifungal activity among the tested drugs against a broad range of filamentous fungi. Caspofungin showed a better in vitro antifungal activity than fluconazole, itraconazole, and amphotericin B. MALDI-TOF MS offers a cost/time-saving, high-throughput and accurate working protocol for identifying filamentous fungi. Voriconazole could still serve as the first-line drug for treating serious infections caused by filamentous fungi, while caspofungin may be another treatment option for fungal infections.
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Affiliation(s)
- Yang Peng
- Department of Clinical Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu 213003, P.R. China
| | - Qin Zhang
- Department of Clinical Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu 213003, P.R. China
| | - Chao Xu
- Department of Clinical Laboratory, Shanghai Tenth People's Hospital Chongming Branch, Chongming, Shanghai 202157, P.R. China
| | - Weifeng Shi
- Department of Clinical Laboratory, The Third Affiliated Hospital of Soochow University, Changzhou, Jiangsu 213003, P.R. China
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Species Distinction in the Trichophyton rubrum Complex. J Clin Microbiol 2019; 57:JCM.00352-19. [PMID: 31189587 PMCID: PMC6711931 DOI: 10.1128/jcm.00352-19] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Accepted: 05/11/2019] [Indexed: 02/06/2023] Open
Abstract
The Trichophyton rubrum species complex comprises commonly encountered dermatophytic fungi with a worldwide distribution. The members of the complex usually have distinct phenotypes in culture and cause different clinical symptoms, despite high genome similarity. In order to better delimit the species within the complex, molecular, phenotypic, and physiological characteristics were combined to reestablish a natural species concept. The Trichophyton rubrum species complex comprises commonly encountered dermatophytic fungi with a worldwide distribution. The members of the complex usually have distinct phenotypes in culture and cause different clinical symptoms, despite high genome similarity. In order to better delimit the species within the complex, molecular, phenotypic, and physiological characteristics were combined to reestablish a natural species concept. Three groups, T. rubrum, T. soudanense, and T. violaceum, could be distinguished based on the sequence of the internal transcribed spacer (ITS) ribosomal DNA barcode gene. On average, strains within each group were similar by colony appearance, microscopy, and physiology, but strains between groups showed significant differences. Trichophyton rubrum strains had higher keratinase activity, whereas T. violaceum strains tended to be more lipophilic; however, none of the phenotypic features were diagnostic. The results of matrix-assisted laser desorption ionization–time of flight mass spectrometry (MALDI-TOF MS) and amplified fragment length polymorphism (AFLP) were partially consistent with the ITS data but failed to distinguish the species unambiguously. Despite their close similarity, T. violaceum, T. soudanense, and T. rubrum can be regarded as independent species with distinct geographical distributions and clinical predilections. Trichophyton soudanense is pheno- and genotypically intermediate between T. rubrum and T. violaceum. For routine diagnostics, ITS sequencing is recommended.
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Naranjo‐Ortiz MA, Gabaldón T. Fungal evolution: major ecological adaptations and evolutionary transitions. Biol Rev Camb Philos Soc 2019; 94:1443-1476. [PMID: 31021528 PMCID: PMC6850671 DOI: 10.1111/brv.12510] [Citation(s) in RCA: 127] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 03/10/2019] [Accepted: 03/13/2019] [Indexed: 12/13/2022]
Abstract
Fungi are a highly diverse group of heterotrophic eukaryotes characterized by the absence of phagotrophy and the presence of a chitinous cell wall. While unicellular fungi are far from rare, part of the evolutionary success of the group resides in their ability to grow indefinitely as a cylindrical multinucleated cell (hypha). Armed with these morphological traits and with an extremely high metabolical diversity, fungi have conquered numerous ecological niches and have shaped a whole world of interactions with other living organisms. Herein we survey the main evolutionary and ecological processes that have guided fungal diversity. We will first review the ecology and evolution of the zoosporic lineages and the process of terrestrialization, as one of the major evolutionary transitions in this kingdom. Several plausible scenarios have been proposed for fungal terrestralization and we here propose a new scenario, which considers icy environments as a transitory niche between water and emerged land. We then focus on exploring the main ecological relationships of Fungi with other organisms (other fungi, protozoans, animals and plants), as well as the origin of adaptations to certain specialized ecological niches within the group (lichens, black fungi and yeasts). Throughout this review we use an evolutionary and comparative-genomics perspective to understand fungal ecological diversity. Finally, we highlight the importance of genome-enabled inferences to envision plausible narratives and scenarios for important transitions.
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Affiliation(s)
- Miguel A. Naranjo‐Ortiz
- Department of Genomics and Bioinformatics, Centre for Genomic Regulation (CRG)The Barcelona Institute of Science and TechnologyDr. Aiguader 88, Barcelona08003Spain
| | - Toni Gabaldón
- Department of Genomics and Bioinformatics, Centre for Genomic Regulation (CRG)The Barcelona Institute of Science and TechnologyDr. Aiguader 88, Barcelona08003Spain
- Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF)08003BarcelonaSpain
- ICREA, Pg. Lluís Companys 2308010BarcelonaSpain
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Sanguino TC, Jarros IC, Negri M. Occurrence of dermatophytoses in patients from the Sistema Único de Saúde. An Bras Dermatol 2019; 94:293-297. [PMID: 31365657 PMCID: PMC6668950 DOI: 10.1590/abd1806-4841.20197491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 02/14/2018] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Dermatophytosis is a cutaneous disease caused by filamentous keratinophilic fungi belonging to the genera Trichophyton, Microsporum and Epidermophyton, which present a high prevalence in the general population, being among the most common mycoses affecting about 20% of the world's population. OBJECTIVE To carry out the epidemiological survey of cases of dermatophytosis in patients from the Sistema Único de Saúde in a regional Laboratory in the period of 5 years (2009 to 2013). METHODS A retrospective study (January 2009 to December 2013) was carried out with a qualitative and quantitative design, through the registry book of the laboratory, Mycology Sector, where cases of patients with suspected dermatomycosis were analyzed. RESULTS In a 5-year period, a total of 4467 cases were suspected of having a fungal infection. Of these, 68.74% (3071) cases were of dermatomycosis. In relation to cultures with fungal growth, 12.54% (385 cases) were dermatophyte fungi and 7.97% (245 cases) non-dermatophyte fungi were isolated. Among the species identified, there was a higher prevalence of T. rubrum complex (75%), T. mentagrophytes complex (11.68%) and M. canis (7.01%). Regarding the sites analyzed, nail involvement was the most frequent in 75% of the cases. STUDY LIMITATIONS This work is representative in the studied region. CONCLUSIONS Dermatomycosis samples are the most frequent among all samples of fungal infections from these patients, with the nail being the most affected area and the fungi T. rubrum complex and T. mentagrophytes complex the most frequent.
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Affiliation(s)
- Talita Carla Sanguino
- Department of Clinical Analyses and Biomedicine, Universidade
Estadual de Maringá, Maringá (PR), Brazil
| | - Isabele Carrilho Jarros
- Department of Clinical Analyses and Biomedicine, Universidade
Estadual de Maringá, Maringá (PR), Brazil
| | - Melyssa Negri
- Department of Clinical Analyses and Biomedicine, Laboratory of
Medical Mycology, Universidade Estadual de Maringá, Maringá (PR),
Brazil
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21
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Abstract
BACKGROUND Many dermatologists do not understand the perpetual adjustments in the dermatophyte nomenclature. OBJECTIVES The aim is to explain the background and the development of methods that have led to previous and current changes of dermatophyte taxonomy and to the detection of new dermatophytes. METHODS In this article we evaluate the recent literature on this topic and our own results in the fields of dermatophyte identification, their detection, and of the associated taxonomic developments. RESULTS Today, the phylogenetic species concept is the basis of taxonomic classification, including that of dermatophytes. Genetic techniques have decisively advanced this and are state of the art nowadays. The detection of new dermatophyte species was often triggered by clinical observations and by morphologically conspicuous cultures that prompted their subsequent exact mycological characterization. Even today not all species of dermatophytes are unequivocally defined. CONCLUSIONS By exclusively using selected genetic characteristics for the construction of phylogenetic trees additional taxonomically relevant features are neglected. Therefore it is necessary to better integrate data derived from morphologic, physiologic, ecologic and pathophysiologic observations into phylogenetic analyses. Dermatologists are still asked to contribute such information.
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Affiliation(s)
- J Brasch
- Klinik für Dermatologie, Venerologie und Allergologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Rosalind Franklin-Str. 7, 24105, Kiel, Deutschland.
| | - R Gläser
- Klinik für Dermatologie, Venerologie und Allergologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Rosalind Franklin-Str. 7, 24105, Kiel, Deutschland.,Hautarztpraxis im Sophienhof, Herzog-Friedrich-Str. 21, 24103, Kiel, Deutschland
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Gnat S, Nowakiewicz A, Łagowski D, Zięba P. Host- and pathogen-dependent susceptibility and predisposition to dermatophytosis. J Med Microbiol 2019; 68:823-836. [PMID: 31050630 DOI: 10.1099/jmm.0.000982] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Dermatophytes are a highly specialized group of keratinophilic and keratinolytic filamentous fungi causing a ringworm disease called dermatophytosis or superficial mycoses. Although dermatophyte infections do not threaten the host's life, they lower its quality in humans by causing discomfort related to cosmetic problems and through their epidemiological significance, whereas in farm animals they are responsible for economic losses and constitute a source of the spread of spores. Evidence from countless observational studies that have been conducted over the last 90 years indicates that dermatophytes infect humans of every age, race, gender and socioeconomic status with strikingly high rates, as well as both farmed and wild animals in various health conditions and with various epidemiological statuses. However, the prevalence of superficial fungal infections is highly variable, since it depends on several parameters associated with the infected individual and the dermatophyte, their mutual interactions, and epidemiological and geographical factors. The curious disparity in dermatophyte infection patterns has prompted many investigators to search for a link between the host, the host's predispositions and susceptibility to the disease, and the dermatophyte species and virulence. Thus, the question arises as to whether, in addition to the generally recognized factors predisposing hosts to diseases, there are some other predispositions to dermatophyte infections in a species-specific host. In this review, we describe recent findings about the mechanism of dermatophyte infections, focusing on the adaptation of the fungi to the host and conditions predisposing each side to the disease.
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Affiliation(s)
- Sebastian Gnat
- 1 University of Life Sciences, Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, Sub-Department of Veterinary Microbiology, Akademicka 12, 20-033 Lublin, Poland
| | - Aneta Nowakiewicz
- 1 University of Life Sciences, Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, Sub-Department of Veterinary Microbiology, Akademicka 12, 20-033 Lublin, Poland
| | - Dominik Łagowski
- 1 University of Life Sciences, Faculty of Veterinary Medicine, Institute of Biological Bases of Animal Diseases, Sub-Department of Veterinary Microbiology, Akademicka 12, 20-033 Lublin, Poland
| | - Przemysław Zięba
- 2 State Veterinary Laboratory, Droga Męczenników Majdanka 50, 20-325 Lublin, Poland
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23
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Garcia Garces H, Cordeiro RT, Bagagli E. PRP8 intein in dermatophytes: Evolution and species identification. Med Mycol 2018; 56:746-758. [PMID: 29228309 DOI: 10.1093/mmy/myx102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 09/27/2017] [Indexed: 11/14/2022] Open
Abstract
Dermatophytes are keratinophilic fungi belonging to the family Arthrodermataceae. Despite having a monophyletic origin, its systematics has always been complex and controversial. Sequencing of nuclear ribosomal ITS and D1/D2 rDNA has been proposed as an efficient tool for identifying species in this group of fungi, while multilocus analyses have been used for phylogenetic species recognition. However, the search for new markers, with sequence and size variation, which enable species identification in only one polymerase chain reaction (PCR) step, is very attractive. Inteins seems to fulfill these characteristics. They are self-splicing genetic elements present within housekeeping coding genes, such as PRP8, that codify the most important protein of the spliceosome. The PRP8 intein has been described for Microsporum canis in databases but has not been studied in dermatophytes in any other published work. Thus, our aim was to determine the potential of this intervening element for establishing phylogenetic relationships among dermatophytes and for identifying species. It was found that all studied species have a full-length PRP8 intein with a Homing Endonuclease belonging to the family LAGLIDADG. Phylogenetic analyses were consistent with other previous phylogenies, confirming Epidermophyton floccosum in the same clade of the Arthroderma gypseum complex, Microsporum audouinii close to M. canis, differentiating A. gypseum from Arthroderma incurvatum, and in addition, better defining the Trichophyton interdigitale and Trichophyton rubrum species grouping. Length polymorphism in the HE region enables identification of the most relevant Microsporum species by a simple PCR-electrophoresis assay. Intein PRP8 within dermatophytes is a powerful additional tool for identifying and systematizing dermatophytes.
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Affiliation(s)
- Hans Garcia Garces
- Departamento de Microbiologia e Imunologia, Instituto de Biociências, Universidade Estadual de São Paulo. São Paulo. Brasil
| | - Raquel Theodoro Cordeiro
- Instituto de Medicina Tropical do RN, Universidade Federal de Rio Grande do Norte. Rio Grande do Norte. Brasil
| | - E Bagagli
- Departamento de Microbiologia e Imunologia, Instituto de Biociências, Universidade Estadual de São Paulo. São Paulo. Brasil
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24
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Gnat S, Łagowski D, Nowakiewicz A, Trościańczyk A, Zięba P. Infection ofTrichophyton verrucosumin cattle breeders, Poland: A 40-year retrospective study on the genomic variability of strains. Mycoses 2018; 61:681-690. [DOI: 10.1111/myc.12791] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 04/12/2018] [Accepted: 05/08/2018] [Indexed: 11/27/2022]
Affiliation(s)
- Sebastian Gnat
- Faculty of Veterinary Medicine; Sub-Department of Veterinary Microbiology; Institute of Biological Bases of Animal Diseases; University of Life Sciences; Lublin Poland
| | - Dominik Łagowski
- Faculty of Veterinary Medicine; Sub-Department of Veterinary Microbiology; Institute of Biological Bases of Animal Diseases; University of Life Sciences; Lublin Poland
| | - Aneta Nowakiewicz
- Faculty of Veterinary Medicine; Sub-Department of Veterinary Microbiology; Institute of Biological Bases of Animal Diseases; University of Life Sciences; Lublin Poland
| | - Aleksandra Trościańczyk
- Faculty of Veterinary Medicine; Sub-Department of Veterinary Microbiology; Institute of Biological Bases of Animal Diseases; University of Life Sciences; Lublin Poland
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25
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Gnat S, Łagowski D, Nowakiewicz A, Zięba P. Phenotypic characterization of enzymatic activity of clinical dermatophyte isolates from animals with and without skin lesions and humans. J Appl Microbiol 2018; 125:700-709. [DOI: 10.1111/jam.13921] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/09/2018] [Accepted: 05/15/2018] [Indexed: 11/30/2022]
Affiliation(s)
- S. Gnat
- Faculty of Veterinary Medicine; Institute of Biological Bases of Animal Diseases; Sub-Department of Veterinary Microbiology; University of Life Sciences; Lublin Poland
| | - D. Łagowski
- Faculty of Veterinary Medicine; Institute of Biological Bases of Animal Diseases; Sub-Department of Veterinary Microbiology; University of Life Sciences; Lublin Poland
| | - A. Nowakiewicz
- Faculty of Veterinary Medicine; Institute of Biological Bases of Animal Diseases; Sub-Department of Veterinary Microbiology; University of Life Sciences; Lublin Poland
| | - P. Zięba
- State Veterinary Laboratory; Lublin Poland
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26
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Molecular characterization of dermatophytes isolated from cattle in Plateau State, Nigeria. Vet Microbiol 2018; 219:212-218. [DOI: 10.1016/j.vetmic.2018.04.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 09/08/2017] [Accepted: 04/12/2018] [Indexed: 11/22/2022]
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27
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Otašević S, Momčilović S, Stojanović NM, Skvarč M, Rajković K, Arsić-Arsenijević V. Non-culture based assays for the detection of fungal pathogens. J Mycol Med 2018; 28:236-248. [PMID: 29605542 PMCID: PMC7110445 DOI: 10.1016/j.mycmed.2018.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Revised: 03/05/2018] [Accepted: 03/05/2018] [Indexed: 01/05/2023]
Abstract
Traditional, culture based methods for the diagnosis of fungal infections are still considered as gold standard, but they are time consuming and low sensitive. Therefore, in order to overcome the limitations, many researchers have focused on the development of new immunological and molecular based rapid assays that could enable early diagnosis of infection and accurate identification of fungal pathogens causing superficial and invasive infection. In this brief review, we highlighted the advantages and disadvantages of conventional diagnostic methods and possibility of non-culture based assays in diagnosis of superficial fungal infections and presented the overview on currently available immunochromatographic assays as well as availability of biomarkers detection by immunodiagnostic procedures in prompt and accurate diagnosis of invasive fungal infections. In addition, we presented diagnostic efficiency of currently available molecular panels and researches in this area.
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Affiliation(s)
- S Otašević
- Center of Microbiology and Parasitology, Public Health Institute Niš, Serbia, boulevard Zorana Djindjica 50, 18000 Niš, Serbia; Department of Microbiology and Immunology, Faculty of Medicine, University of Niš, Serbia, boulevard Zorana Djindjica 81, 18000 Niš, Serbia.
| | - S Momčilović
- Department of Microbiology and Immunology, Faculty of Medicine, University of Niš, Serbia, boulevard Zorana Djindjica 81, 18000 Niš, Serbia
| | - N M Stojanović
- Faculty of Medicine, University of Niš, Serbia, boulevard Zorana Djindjica 81, 18000 Niš, Serbia
| | - M Skvarč
- University of Ljubljana, Faculty of Medicine, Institute of Microbiology and Immunology, Zaloska 4, Ljubljana, Slovenia
| | - K Rajković
- High Chemical and Technological School for Professional Studies, Kosančićeva 36, 37000 Kruševac, Serbia
| | - V Arsić-Arsenijević
- Department for Microbiology and Immunology, Faculty of Medicine, University of Belgrade, Serbia, Dr Subotića 1, 11000 Belgrade, Serbia
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28
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Lam PL, Lee KKH, Wong RSM, Cheng GYM, Bian ZX, Chui CH, Gambari R. Recent advances on topical antimicrobials for skin and soft tissue infections and their safety concerns. Crit Rev Microbiol 2018; 44:40-78. [PMID: 28423970 DOI: 10.1080/1040841x.2017.1313811] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Antimicrobial resistance of disease-related microorganisms is considered a worldwide prevalent and serious issue which increases the failure of treatment outcomes and leads to high mortality. Considering that the increased resistance to systemic antimicrobial therapy often needs of the use of more toxic agents, topical antimicrobial therapy emerges as an attractive route for the treatment of infectious diseases. The topical antimicrobial therapy is based on the absorption of high drug doses in a readily accessible skin surface, resulting in a reduction of microbial proliferation at infected skin sites. Topical antimicrobials retain the following features: (a) they are able to escape the enzymatic degradation and rapid clearance in the gastrointestinal tract or the first-pass metabolism during oral administration; (b) alleviate the physical discomfort related to intravenous injection; (c) reduce possible adverse effects and drug interactions of systemic administrations; (d) increase patient compliance and convenience; and (e) reduce the treatment costs. Novel antimicrobials for topical application have been widely exploited to control the emergence of drug-resistant microorganisms. This review provides a description of antimicrobial resistance, common microorganisms causing skin and soft tissue infections, topical delivery route of antimicrobials, safety concerns of topical antimicrobials, recent advances, challenges and future prospective in topical antimicrobial development.
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Affiliation(s)
- P L Lam
- a Department of Applied Biology and Chemical Technology, State Key Laboratory of Chirosciences , The Hong Kong Polytechnic University , Hong Kong , P.R. China
| | - K K H Lee
- b Department of Medicine and Therapeutics, School of Biomedical Sciences, MOE Key Laboratory for Regenerative Medicine , The Chinese University of Hong Kong , Hong Kong , P.R. China
| | - R S M Wong
- b Department of Medicine and Therapeutics, School of Biomedical Sciences, MOE Key Laboratory for Regenerative Medicine , The Chinese University of Hong Kong , Hong Kong , P.R. China
| | - G Y M Cheng
- c Faculty of Health Sciences , University of Macau , Macau , P.R. China
| | - Z X Bian
- d Clinical Division, School of Chinese Medicine , Hong Kong Baptist University , Hong Kong , P.R. China
| | - C H Chui
- a Department of Applied Biology and Chemical Technology, State Key Laboratory of Chirosciences , The Hong Kong Polytechnic University , Hong Kong , P.R. China
- d Clinical Division, School of Chinese Medicine , Hong Kong Baptist University , Hong Kong , P.R. China
| | - R Gambari
- e Department of Life Sciences and Biotechnology, Centre of Biotechnology , University of Ferrara , Ferrara , Italy
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Abstract
Fungi must meet four criteria to infect humans: growth at human body temperatures, circumvention or penetration of surface barriers, lysis and absorption of tissue, and resistance to immune defenses, including elevated body temperatures. Morphogenesis between small round, detachable cells and long, connected cells is the mechanism by which fungi solve problems of locomotion around or through host barriers. Secretion of lytic enzymes, and uptake systems for the released nutrients, are necessary if a fungus is to nutritionally utilize human tissue. Last, the potent human immune system evolved in the interaction with potential fungal pathogens, so few fungi meet all four conditions for a healthy human host. Paradoxically, the advances of modern medicine have made millions of people newly susceptible to fungal infections by disrupting immune defenses. This article explores how different members of four fungal phyla use different strategies to fulfill the four criteria to infect humans: the Entomophthorales, the Mucorales, the Ascomycota, and the Basidiomycota. Unique traits confer human pathogenic potential on various important members of these phyla: pathogenic Onygenales comprising thermal dimorphs such as Histoplasma and Coccidioides; the Cryptococcus spp. that infect immunocompromised as well as healthy humans; and important pathogens of immunocompromised patients-Candida, Pneumocystis, and Aspergillus spp. Also discussed are agents of neglected tropical diseases important in global health such as mycetoma and paracoccidiomycosis and common pathogens rarely implicated in serious illness such as dermatophytes. Commensalism is considered, as well as parasitism, in shaping genomes and physiological systems of hosts and fungi during evolution.
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30
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El Damaty HM, Tartor YH, Mahmmod YS. Species Identification, Strain Differentiation, and Antifungal Susceptibility of Dermatophyte Species Isolated From Clinically Infected Arabian Horses. J Equine Vet Sci 2017. [DOI: 10.1016/j.jevs.2017.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Moriello KA, Coyner K, Paterson S, Mignon B. Diagnosis and treatment of dermatophytosis in dogs and cats.: Clinical Consensus Guidelines of the World Association for Veterinary Dermatology. Vet Dermatol 2017; 28:266-e68. [PMID: 28516493 DOI: 10.1111/vde.12440] [Citation(s) in RCA: 119] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/22/2016] [Indexed: 12/12/2022]
Abstract
BACKGROUND Dermatophytosis is a superficial fungal skin disease of cats and dogs. The most common pathogens of small animals belong to the genera Microsporum and Trichophyton. It is an important skin disease because it is contagious, infectious and can be transmitted to people. OBJECTIVES The objective of this document is to review the existing literature and provide consensus recommendations for veterinary clinicians and lay people on the diagnosis and treatment of dermatophytosis in cats and dogs. METHODS The authors served as a Guideline Panel (GP) and reviewed the literature available prior to September 2016. The GP prepared a detailed literature review and made recommendations on selected topics. The World Association of Veterinary Dermatology (WAVD) provided guidance and oversight for this process. A draft of the document was presented at the 8th World Congress of Veterinary Dermatology (May 2016) and was then made available via the World Wide Web to the member organizations of the WAVD for a period of three months. Comments were solicited and posted to the GP electronically. Responses were incorporated by the GP into the final document. CONCLUSIONS No one diagnostic test was identified as the gold standard. Successful treatment requires concurrent use of systemic oral antifungals and topical disinfection of the hair coat. Wood's lamp and direct examinations have good positive and negative predictability, systemic antifungal drugs have a wide margin of safety and physical cleaning is most important for decontamination of the exposed environments. Finally, serious complications of animal-human transmission are exceedingly rare.
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Affiliation(s)
- Karen A Moriello
- Department of Medical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, 2015 Linden Drive West, Madison, WI, 53706, USA
| | - Kimberly Coyner
- Dermatology Clinic for Animals, 8300 Quinault Drive NE Suite A, Lacey, WA, 98516, USA
| | - Susan Paterson
- Department of Veterinary Dermatology, Rutland House Referral Hospital, Abbotsfield Road, St Helens, WA9 4HU, UK
| | - Bernard Mignon
- Department of Infectious and Parasitic Diseases, Veterinary Mycology, FARAH (Fundamental and Applied Research for Animals & Health), Faculty of Veterinary Medicine, University of Liège, Quartier Vallée 2, Avenue de Cureghem 10, B43A, 4000, Liège, Belgium
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32
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Gnat S, Nowakiewicz A, Ziółkowska G, Trościańczyk A, Majer-Dziedzic B, Zięba P. Evaluation of growth conditions and DNA extraction techniques used in the molecular analysis of dermatophytes. J Appl Microbiol 2017; 122:1368-1379. [DOI: 10.1111/jam.13427] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 02/13/2017] [Accepted: 02/20/2017] [Indexed: 11/28/2022]
Affiliation(s)
- S. Gnat
- Sub-Department of Veterinary Microbiology; Institute of Biological Bases of Animal Diseases; Faculty of Veterinary Medicine; University of Life Sciences; Lublin Poland
| | - A. Nowakiewicz
- Sub-Department of Veterinary Microbiology; Institute of Biological Bases of Animal Diseases; Faculty of Veterinary Medicine; University of Life Sciences; Lublin Poland
| | - G. Ziółkowska
- Sub-Department of Veterinary Microbiology; Institute of Biological Bases of Animal Diseases; Faculty of Veterinary Medicine; University of Life Sciences; Lublin Poland
| | - A. Trościańczyk
- Sub-Department of Veterinary Microbiology; Institute of Biological Bases of Animal Diseases; Faculty of Veterinary Medicine; University of Life Sciences; Lublin Poland
| | - B. Majer-Dziedzic
- Sub-Department of Veterinary Microbiology; Institute of Biological Bases of Animal Diseases; Faculty of Veterinary Medicine; University of Life Sciences; Lublin Poland
| | - P. Zięba
- State Veterinary Laboratory; Lublin Poland
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33
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López EIC, Balcázar MFH, Mendoza JMR, Ortiz ADR, Melo MTO, Parrales RS, Delgado TH. Antimicrobial Activity of Essential Oil of <i>Zingiber officinale</i> Roscoe (Zingiberaceae). ACTA ACUST UNITED AC 2017. [DOI: 10.4236/ajps.2017.87104] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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34
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Zhan P, Liu W. The Changing Face of Dermatophytic Infections Worldwide. Mycopathologia 2016; 182:77-86. [PMID: 27783316 DOI: 10.1007/s11046-016-0082-8] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 10/11/2016] [Indexed: 12/27/2022]
Abstract
Dermatophytes evolve along with the geography and socioeconomic conditions. Epidermophyton floccosum, Microsporum audouinii and Trichophyton schoenleinii acted as the major pathogens of superficial fungal diseases 100 years ago, but their frequency decreased dramatically since the middle of the twentieth century and they are limited to some less-developed countries nowadays; meanwhile, frequency of Trichophyton rubrum, Trichophyton interdigitale, Trichophyton tonsurans and Microsporum canis increased gradually, and these fungi have become the major species globally. Some other dermatophytes, i.e., Trichophyton violaceum, Trichophyton verrucosum and Microsporum ferrugineum, are mainly endemic in some parts of Africa, Asia and Europe. At present, T. rubrum is the leading pathogen for skin and nail fungal infections, whereas M. canis, T. tonsurans and T. violaceum present as the predominant dermatophytes involved in tinea capitis. Population mobility, changes in human lifestyle and advents of antifungal drugs will continually drive the dermatophyte evolution in the skin microenvironment. Comprehensive observation is needed to better understand this kind of organisms and prospect the trends of their changes in future.
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Affiliation(s)
- Ping Zhan
- Dermatology Hospital of Jiangxi Province and Dermatology Institute of Jiangxi Province, Nanchang, China
- CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands
- Institute of Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Weida Liu
- Department of Mycology, Institute of Dermatology, Chinese Academy of Medical Science and Peking Union Medical College, Nanjing, China.
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35
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Metin B, Heitman J. Sexual Reproduction in Dermatophytes. Mycopathologia 2016; 182:45-55. [PMID: 27696123 DOI: 10.1007/s11046-016-0072-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 09/25/2016] [Indexed: 01/12/2023]
Abstract
Sexual reproduction is a rich source of genetic variation and commonly observed among fungi. Basically two different modes of sexual reproduction are observed in fungi, namely heterothallism where two compatible mating types are required to undergo mating and homothallism in which the organism is self-fertile. The genomic region governing the process of sexual reproduction and sex determination is called the mating type (MAT) locus. In filamentous ascomycetes including dermatophytes, the MAT locus harbors two different transcription factor genes in two different mating types. This review focuses on sexual reproduction and the structure of the MAT locus in dermatophytes. The reproductive modes and the observed mating types are summarized for different phylogenetic clades of dermatophytes. In addition, the question of whether or not unisexual reproduction, an interesting form of homothallism, may be the sexual reproduction mode especially in anthropophilic dermatophytes is raised.
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Affiliation(s)
- Banu Metin
- Department of Food Engineering, Faculty of Engineering and Natural Sciences, Istanbul Sabahattin Zaim University, Halkali cad, No: 2, Halkali, 34303, Kucukcekmece, Istanbul, Turkey.
| | - Joseph Heitman
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, Durham, NC, 27710, USA
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36
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Hayette MP, Sacheli R. Unusual Species of Dermatophytes: Rarely Identified or New? Mycopathologia 2016; 182:203-213. [PMID: 27640161 DOI: 10.1007/s11046-016-0066-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 09/05/2016] [Indexed: 12/14/2022]
Abstract
Dermatophytes are causing superficial mycosis in animals and humans. Depending on the geophilic, zoophilic or anthropophilic origin of the fungus but also on the immunological status of the patient, symptomatology can widely differ. Nevertheless, each species is currently associated with typical clinical manifestations, even if atypical localizations and/or clinical pictures are sometimes also reported. Diagnostic tools applied to species identification have been changing since the last two decades with the more frequent use of molecular methods currently considered nowadays as reference methods for species identification. It becomes obvious that the algorithm used for the distinction of closely related species needs to combine phenotypic and genomic methods. All these different points are discussed, and the most recent novel species causing or involved in human dermatophytosis are reported.
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Affiliation(s)
- Marie-Pierre Hayette
- Department of Clinical Microbiology, National Reference Centre for Mycosis, University Hospital of Liège, Domaine du Sart Tilman B23, Avenue de l'Hôpital, 1, 4000, Liège, Belgium.
| | - Rosalie Sacheli
- Department of Clinical Microbiology, National Reference Centre for Mycosis, University Hospital of Liège, Domaine du Sart Tilman B23, Avenue de l'Hôpital, 1, 4000, Liège, Belgium
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37
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Abarca ML, Castellá G, Martorell J, Cabañes FJ. Trichophyton erinacei in pet hedgehogs in Spain: Occurrence and revision of its taxonomic status. Med Mycol 2016; 55:164-172. [PMID: 27486214 DOI: 10.1093/mmy/myw057] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 03/03/2016] [Accepted: 06/07/2016] [Indexed: 11/13/2022] Open
Abstract
Hedgehogs have increased in popularity as pets in Spain but there are no data of infection rates of this exotic animal with dermatophytes in our country. During the period of 2008-2011 a total of 20 pet hedgehogs (19 African pygmy hedgehogs and 1 Egyptian long-eared hedgehog) suspected of having dermatophytoses were studied. This is the first survey of the occurrence of T. erinacei in household hedgehogs in Spain. The T. erinacei infection rate was 50% (9 out of 19 African pygmy hedgehogs, and the one Egyptian long-eared hedgehog surveyed). Morphological identification of the isolates was confirmed by molecular analysis. All the strains had the same ITS sequence and showed 100% sequence similarity to T. erinacei type strain CBS 511.73 (AB 105793). The Spanish isolates were confirmed as T. erinacei urease positive. On the basis of ITS sequences, T. erinacei is a species close to but separate from the taxa included in the A. benhamiae complex. Review of the current literature on DNA-based methods for identification of species included in this complex has highlighted the urgent need to reach a consensus in species circumscription and classification system accepted by all mycologists.
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Affiliation(s)
- M L Abarca
- Veterinary Mycology Group, Department of Animal Health and Anatomy
| | - G Castellá
- Veterinary Mycology Group, Department of Animal Health and Anatomy
| | - J Martorell
- Department of Animal Medicine and Surgery and Veterinary Teaching Hospital, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain
| | - F J Cabañes
- Veterinary Mycology Group, Department of Animal Health and Anatomy
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38
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Mochizuki T, Takeda K, Anzawa K. Molecular Markers Useful for Intraspecies Subtyping and Strain Differentiation of Dermatophytes. Mycopathologia 2016; 182:57-65. [PMID: 27456819 DOI: 10.1007/s11046-016-0041-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Accepted: 07/07/2016] [Indexed: 02/04/2023]
Abstract
Dermatophytosis is a very common skin disorder and the most frequent infection encountered by practicing dermatologists. The identification, pathogenicity, biology, and epidemiology of dermatophytes, the causative agents of dermatophytosis, are of interest for both dermatologists and medical mycologists. Recent advances in molecular methods have provided new techniques for identifying dermatophytes, including intraspecies variations. Intraspecies subtyping and strain differentiation have made possible the tracking of infections, the identification of common sources of infections, recurrence or reinfection after treatment, and analysis of strain virulence and drug resistance. This review describes molecular methods of intraspecies subtyping and strain differentiation, including analyses of mitochondrial DNA and non-transcribed spacer regions of ribosomal RNA genes, random amplification of polymorphic DNA, and microsatellite markers, along with their advantages and limitations.
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Affiliation(s)
- Takashi Mochizuki
- Department of Dermatology, Kanazawa Medical University, Daigaku 1-1, Uchinada, Ishikawa, 920-0293, Japan.
| | - Kiminobu Takeda
- Department of Dermatology, Kanazawa Medical University, Daigaku 1-1, Uchinada, Ishikawa, 920-0293, Japan
| | - Kazushi Anzawa
- Department of Dermatology, Kanazawa Medical University, Daigaku 1-1, Uchinada, Ishikawa, 920-0293, Japan
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Garcia Garces H, Hrycyk MF, Giacobino J, Capela Machado G, Domingos Arantes T, Theodoro RC, Bosco SDMG, Bagagli E. Molecular identification and phylogenetical analysis of dermatophyte fungi from Latin America. Mycoses 2016; 59:787-797. [DOI: 10.1111/myc.12532] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 06/06/2016] [Accepted: 06/13/2016] [Indexed: 11/30/2022]
Affiliation(s)
- Hans Garcia Garces
- Departamento de Microbiologia e Imunologia; Instituto de Biociências de Botucatu; Universidade Estadual Paulista; São Paulo Brazil
| | - Marluce F. Hrycyk
- Departamento de Microbiologia e Imunologia; Instituto de Biociências de Botucatu; Universidade Estadual Paulista; São Paulo Brazil
| | - Juliana Giacobino
- Departamento de Microbiologia e Imunologia; Instituto de Biociências de Botucatu; Universidade Estadual Paulista; São Paulo Brazil
| | - Gabriel Capela Machado
- Departamento de Microbiologia e Imunologia; Instituto de Biociências de Botucatu; Universidade Estadual Paulista; São Paulo Brazil
| | | | - Raquel C. Theodoro
- Centro de Biociências; Universidade Federal de Rio Grande do Norte; Natal Brazil
| | - Sandra de M. G. Bosco
- Departamento de Microbiologia e Imunologia; Instituto de Biociências de Botucatu; Universidade Estadual Paulista; São Paulo Brazil
| | - Eduardo Bagagli
- Departamento de Microbiologia e Imunologia; Instituto de Biociências de Botucatu; Universidade Estadual Paulista; São Paulo Brazil
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40
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Neji S, Trabelsi H, Hadrich I, Cheikhrouhou F, Sellami H, Makni F, Ayadi A. Molecular characterization of strains of theTrichophyton verrucosumcomplex from Tunisia. Med Mycol 2016; 54:787-93. [DOI: 10.1093/mmy/myw036] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 03/10/2016] [Indexed: 11/13/2022] Open
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41
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Antonio CNS, Elnatan BDS, Marcos FABGR, Maria RJRA, Paulo NB, H eacute lcio SDSRP, Selene MDM, Raquel ODSF, Carolina SDPC. Cytotoxicity, antifungal and antioxidant activities of the essential oil from Eupatorium ballotifolium Kunth (Asteraceae). ACTA ACUST UNITED AC 2016. [DOI: 10.5897/ajpp2016.4537] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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42
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Mirhendi H, Motamedi M, Makimura K, Satoh K. Development a diagnostic pan-dermatophyte TaqMan probe real-time PCR assay based on beta tubulin gene. Mycoses 2016; 59:520-7. [PMID: 27071371 DOI: 10.1111/myc.12502] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 01/30/2016] [Accepted: 03/05/2016] [Indexed: 11/28/2022]
Abstract
Early differentiation of dermatophytosis from other cutaneous mycoses is essential to avoid inaccurate therapy. DNA-based techniques including real-time PCR have increasingly been considered for detection of fungal elements in clinical specimens. In this study, after partial sequence analysis of beta tubulin (BT2) gene in 13 common and rare pathogenic dermatophyte species, a pan-dermatophyte primer and probe set was designed in a TaqMan probe-based PCR format. The sensitivity and specificity of the system was tested with 22 reference strains of dermatophytes, 234 positive clinical specimens, 32 DNA samples extracted from normal nails, several fungi other than dermatophytes and human DNAs. Analytical detection limit of the designed PCR on serially diluted DNAs of prepared recombinant plasmid indicated that only five molecules per sample are the minimum number for reliable detection by the assay. A total of 226 out of 234 (96.5%) DNAs extracted from clinical samples, but none of the 32 nail samples, from healthy volunteers were positive in PCR. The real-time PCR targeted beta tubulin gene established in this study could be a sensitive diagnostic tool which is significantly faster than the conventional culture method and should be useful in the clinical settings, in large-scale epidemiological studies and in clinical trials of antifungal therapy.
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Affiliation(s)
- Hossein Mirhendi
- Departments of Medical Parasitology and Mycology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.,Departments of Medical Parasitology and Mycology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Marjan Motamedi
- Departments of Medical Parasitology & Mycology, School of Public Health, National Institute of Health Research, Tehran University of Medical Sciences, Tehran, Iran
| | - Koichi Makimura
- Teikyo University Institute of Medical Mycology, Tokyo, Japan
| | - Kazuo Satoh
- Teikyo University Institute of Medical Mycology, Tokyo, Japan
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43
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Pchelin IM, Zlatogursky VV, Rudneva MV, Chilina GA, Rezaei-Matehkolaei A, Lavnikevich DM, Vasilyeva NV, Taraskina AE. Reconstruction of phylogenetic relationships in dermatomycete genus Trichophyton Malmsten 1848 based on ribosomal internal transcribed spacer region, partial 28S rRNA and beta-tubulin genes sequences. Mycoses 2016; 59:566-75. [PMID: 27071492 DOI: 10.1111/myc.12505] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 02/15/2016] [Accepted: 03/08/2016] [Indexed: 01/21/2023]
Abstract
Trichophyton spp. are important causative agents of superficial mycoses. The phylogeny of the genus and accurate strain identification, based on the ribosomal ITS region sequencing, are still under development. The present work is aimed at (i) inferring the genus phylogeny from partial ITS, LSU and BT2 sequences (ii) description of ribosomal ITS region polymorphism in 15 strains of Trichophyton interdigitale. We performed DNA sequence-based species identification and phylogenetic analysis on 48 strains belonging to the genus Trichophyton. Phylogenetic relationships were inferred by maximum likelihood and Bayesian methods on concatenated ITS, LSU and BT2 sequences. Ribosomal ITS region polymorphisms were assessed directly on the alignment. By phylogenetic reconstruction, we reveal major anthropophilic and zoophilic species clusters in the genus Trichophyton. We describe several sequences of the ITS region of T. interdigitale, which do not fit in the traditional polymorphism scheme and propose emendations in this scheme for discrimination between ITS sequence types in T. interdigitale. The new polymorphism scheme will allow inclusion of a wider spectrum of isolates while retaining its explanatory power. This scheme was also found to be partially congruent with NTS typing technique.
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Affiliation(s)
- Ivan M Pchelin
- Kashkin Research Institute of Medical Mycology, I.I. Mechnikov North-Western State Medical University, St. Petersburg, Russia
| | - Vasily V Zlatogursky
- Department of Invertebrate Zoology, Faculty of Biology, St. Petersburg State University, St. Petersburg, Russia
| | - Mariya V Rudneva
- Kashkin Research Institute of Medical Mycology, I.I. Mechnikov North-Western State Medical University, St. Petersburg, Russia
| | - Galina A Chilina
- Kashkin Research Institute of Medical Mycology, I.I. Mechnikov North-Western State Medical University, St. Petersburg, Russia
| | - Ali Rezaei-Matehkolaei
- Health Research Institute, Infectious and Tropical Diseases Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Medical Mycology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Dmitry M Lavnikevich
- Kashkin Research Institute of Medical Mycology, I.I. Mechnikov North-Western State Medical University, St. Petersburg, Russia
| | - Natalya V Vasilyeva
- Kashkin Research Institute of Medical Mycology, I.I. Mechnikov North-Western State Medical University, St. Petersburg, Russia
| | - Anastasia E Taraskina
- Kashkin Research Institute of Medical Mycology, I.I. Mechnikov North-Western State Medical University, St. Petersburg, Russia
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Bitencourt TA, Macedo C, Franco ME, Assis AF, Komoto TT, Stehling EG, Beleboni RO, Malavazi I, Marins M, Fachin AL. Transcription profile of Trichophyton rubrum conidia grown on keratin reveals the induction of an adhesin-like protein gene with a tandem repeat pattern. BMC Genomics 2016; 17:249. [PMID: 26993619 PMCID: PMC4797125 DOI: 10.1186/s12864-016-2567-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 03/07/2016] [Indexed: 11/14/2022] Open
Abstract
Background Trichophyton rubrum is a cosmopolitan filamentous fungus that can infect human keratinized tissue (skin, nails and, rarely, hair) and is the major agent of all chronic and recurrent dermatophytoses. The dermatophyte infection process is initiated through the release of arthroconidial adhesin, which binds to the host stratum corneum. The conidia then germinate, and fungal hyphae invade keratinized skin structures through the secretion of proteases. Although arthroconidia play a central role in pathogenesis, little is known about the dormancy and germination of T. rubrum conidia and the initiation of infection. The objective of this study was to evaluate the transcriptional gene expression profile of T. rubrum conidia during growth on keratin- or elastin-containing medium, mimicking superficial and deep dermatophytosis, respectively. Results A transcriptional profiling analysis was conducted using a custom oligonucleotide-based microarray by comparing T. rubrum conidia grown on elastin and keratin substrates. This comparison shows differences according to protein source used, but consisted of a very small set of genes, which could be attributed to the quiescent status of conidia. The modulated genes were related to the dormancy, survival and germination of conidia, including genes involved in the respiratory chain, signal transduction and lipid metabolism. However, an induction of a great number of proteases occurred when T. rubrum was grown in the presence of keratin such as the subtilisin family of proteases (Sub 1 and Sub 3) and leucine aminopeptidase (Lap 1 and Lap 2). Interestingly, keratin also promoted the up-regulation of a gene encoding an adhesin-like protein with a tandem repeat sequence. In silico analysis showed that the protein contains a domain related to adhesin that may play a role in host-pathogen interactions. The expression of this adhesin-like gene was also induced during the co-culture of T. rubrum with a human keratinocyte cell line, confirming its role in fungal-host interactions. Conclusion These results contribute to the discovery of new targets involved in the adhesion of conidia and the maintenance of conidial dormancy, which are essential for triggering the process of infection and the chronicity of dermatophytosis.
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Affiliation(s)
- Tamires Aparecida Bitencourt
- Unidade de Biotecnologia, Universidade de Ribeirão Preto, Av: Costábile Romano 2201, 14096-900, Ribeirão Preto, SP, Brazil
| | - Claudia Macedo
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Ribeirão Preto, Brazil
| | - Matheus Eloy Franco
- Unidade de Biotecnologia, Universidade de Ribeirão Preto, Av: Costábile Romano 2201, 14096-900, Ribeirão Preto, SP, Brazil.,Instituto Federal do Sul de Minas - Campus Machado, Machado, Brazil
| | - Amanda Freire Assis
- Departamento de Genética, Faculdade de Medicina de Ribeirão Preto, Ribeirão Preto, Brazil
| | - Tatiana Takahasi Komoto
- Unidade de Biotecnologia, Universidade de Ribeirão Preto, Av: Costábile Romano 2201, 14096-900, Ribeirão Preto, SP, Brazil
| | | | - Rene Oliveira Beleboni
- Unidade de Biotecnologia, Universidade de Ribeirão Preto, Av: Costábile Romano 2201, 14096-900, Ribeirão Preto, SP, Brazil
| | - Iran Malavazi
- Departamento de Genética e Evolução, Centro de Ciências Biológicas e da Saúde (CCBS), Universidade Federal de São Carlos, São Carlos, Brazil
| | - Mozart Marins
- Unidade de Biotecnologia, Universidade de Ribeirão Preto, Av: Costábile Romano 2201, 14096-900, Ribeirão Preto, SP, Brazil
| | - Ana Lúcia Fachin
- Unidade de Biotecnologia, Universidade de Ribeirão Preto, Av: Costábile Romano 2201, 14096-900, Ribeirão Preto, SP, Brazil.
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45
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Rezaei-Matehkolaei A, Rafiei A, Makimura K, Gräser Y, Gharghani M, Sadeghi-Nejad B. Epidemiological Aspects of Dermatophytosis in Khuzestan, southwestern Iran, an Update. Mycopathologia 2016; 181:547-53. [PMID: 26886443 DOI: 10.1007/s11046-016-9990-x] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Accepted: 02/01/2016] [Indexed: 11/30/2022]
Abstract
Dermatophytosis is among the most common superficial mycoses in Iran. The purpose of this report was to update the clinical and mycological features of human dermatophytosis in the Khuzestan, southwestern Iran. In the framework of a one-year survey, a total of 4120 skin, hair and nail samples obtained from the outpatients with symptoms suggestive of tinea were analyzed by using direct microscopy, culture and molecular identification methods. Strains isolated from cultures were subjected to amplification of the nuclear rDNA ITS regions in a PCR assay followed by an early established RFLP analysis. For confirmation of species identification, 100 isolates as representatives of all presumable species were subjected to ITS sequencing. Infection was confirmed in 1123 individuals (27.25 %) in the age range of 1-89 years by direct microscopy and/or culture including 603 males versus 520 females. Frequencies of infections were the highest and the lowest in age groups of 21-30 and 11-20 years, respectively. Tinea corporis was the most prevalent clinical manifestation followed by tinea cruris, tinea capitis, tinea manuum, tinea pedis, tinea unguium, tinea faciei and tinea barbae. Trichophyton interdigitale (58.7 %) was the most dominant isolate followed by Epidermophyton floccosum (35.4 %), Microsporum canis (3 %), T. rubrum (1.5 %), T. species of Arthroderma benhamiae (0.5 %), T. tonsurans (0.3 %) and T. violaceum (0.3 %). Other species included M. gypseum, M. fulvum and T. verrucosum (each one 0.1 %). Such a high occurrence of infection with T. interdigitale, which has not been reported from Iran, is due to the use of accurate molecular methods based on new species concept in dermatophytes. The prevalence of dermatophytoses caused by zoophilic species remarkably increased and Trichophyton species of A. benhamiae has emerged as a new agent of dermatophytosis in southwestern Iran, while infections due to anthropophilic species, except E. floccosum, took a decreasing trend.
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Affiliation(s)
- Ali Rezaei-Matehkolaei
- Health Research Institute, Infectious and Tropical Diseases Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran. .,Department of Medical Mycology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Abdollah Rafiei
- Health Research Institute, Infectious and Tropical Diseases Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Medical Parasitology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Koichi Makimura
- Laboratory of Space and Environmental Medicine, Graduate School of Medicine, Teikyo University, Tokyo, Japan
| | - Yvonne Gräser
- Consiliary Laboratory for Dermatophytes, Institute of Microbiology, Charité-Universitätsmedizin Berlin, Dorotheenstrasse 96, Berlin, Germany
| | - Maral Gharghani
- Department of Medical Mycology, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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46
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Almuzaini AM, Osman SA, Saeed EM. An outbreak of dermatophytosis in camels ( Camelus dromedaríus) at Qassim Region, Central of Saudi Arabia. JOURNAL OF APPLIED ANIMAL RESEARCH 2016. [DOI: 10.1080/09712119.2015.1021806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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47
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Molecular Detection and Identification of Fungal Pathogens. Mol Microbiol 2016. [DOI: 10.1128/9781555819071.ch35] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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48
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Wang HY, Kim H, Choi E, Lee H. Performance of the Real Fungus-ID kit based on multiplex RT-PCR assay for the rapid detection and identification of Trichophyton
spp. and Microsporum
spp. in clinical specimens with suspected dermatophyte infection. J Appl Microbiol 2015; 120:234-47. [DOI: 10.1111/jam.12993] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2015] [Revised: 10/16/2015] [Accepted: 10/22/2015] [Indexed: 11/29/2022]
Affiliation(s)
- H.-Y. Wang
- Wonju Eco Environmental Technology Center; M&D, Inc.; Wonju Korea
| | - H. Kim
- Department of Biomedical Laboratory Science; College of Health Sciences; Yonsei University; Wonju Korea
| | - E.H. Choi
- Department of Dermatology; Yonsei University Wonju College of Medicine; Wonju Korea
| | - H. Lee
- Department of Biomedical Laboratory Science; College of Health Sciences; Yonsei University; Wonju Korea
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49
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Abstract
Research over the past two decades shows that both recombination and clonality are likely to contribute to the reproduction of all fungi. This view of fungi is different from the historical and still commonly held view that a large fraction of fungi are exclusively clonal and that some fungi have been exclusively clonal for hundreds of millions of years. Here, we first will consider how these two historical views have changed. Then we will examine the impact on fungal research of the concept of restrained recombination [Tibayrenc M, Ayala FJ (2012) Proc Natl Acad Sci USA 109 (48):E3305-E3313]. Using animal and human pathogenic fungi, we examine extrinsic restraints on recombination associated with bottlenecks in genetic variation caused by geographic dispersal and extrinsic restraints caused by shifts in reproductive mode associated with either disease transmission or hybridization. Using species of the model yeast Saccharomyces and the model filamentous fungus Neurospora, we examine intrinsic restraints on recombination associated with mating systems that range from strictly clonal at one extreme to fully outbreeding at the other and those that lie between, including selfing and inbreeding. We also consider the effect of nomenclature on perception of reproductive mode and a means of comparing the relative impact of clonality and recombination on fungal populations. Last, we consider a recent hypothesis suggesting that fungi thought to have the most severe intrinsic constraints on recombination actually may have the fewest.
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50
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Zhan P, Li D, Wang C, Sun J, Geng C, Xiong Z, Seyedmousavi S, Liu W, de Hoog GS. Epidemiological changes in tinea capitis over the sixty years of economic growth in China. Med Mycol 2015; 53:691-8. [PMID: 26260745 DOI: 10.1093/mmy/myv057] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 06/11/2015] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Tinea capitis is a fungal infection of the scalp occurring commonly in children. Historical data indicate that clinical manifestations and the spectrum of etiologic agents vary greatly with geography, as well as socioeconomic affected populations. OBJECTIVE To study the possible connection between socioeconomic status, the disease patterns and the variability of etiological agents. METHODS We reviewed tinea capitis in China through literature since 1956. The disease pattern was correlated with economic and public health management protocols. Historical data on fungal identification were mostly obtained by morphology. The accuracy of these historical results was further confirmed by use of both morphological and ITS identification on a control set of 90 isolates collected recently from local hospital. RESULTS Full agreement of the two identification methods implies that data from the literature were sufficiently reliable to allow comparison across reported cases. In sum, 88 papers involving 25 administrative provinces and municipalities with 38,962 clinical strains met the inclusion criteria of this review. Zoophilic species Microsporum canis is the most prevalent agent within large, modernized cities in China today accounting for over 80% of infections. In contrast, anthropophilic dermatophytes, particularly Trichophyton violaceum, are geographically endemic only in some southeastern and northwestern regions. CONCLUSION Economic development and urbanization of cities favor a shift of etiological agents from anthroponoses to zoonoses in contemporary China. Pets are becoming the most likely sources of infection in modern lifestyles, replacing the earlier human-to-human transmission mode. However, the latter transmission mode is still prevalent in less developed areas lacking adequate social and public health facilities.
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Affiliation(s)
- Ping Zhan
- Institute of Dermatology, Chinese Academy of Medical Science & Peking Union Medical College, Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing 210042, China Dermatology Hospital of Jiangxi Province, Jiangxi Provincial institute of Dermatology, Nanchang 330001, China CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
| | - Dongmei Li
- Institute of Dermatology, Chinese Academy of Medical Science & Peking Union Medical College, Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing 210042, China Georgetown University Medical Center, Department of Microbiology / Immunology, Washington, DC 20057, United States
| | - Chong Wang
- Institute of Dermatology, Chinese Academy of Medical Science & Peking Union Medical College, Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing 210042, China Dermatology Department, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, 310009 China
| | - Jiufeng Sun
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China
| | - Chengfang Geng
- Dermatology Hospital of Jiangxi Province, Jiangxi Provincial institute of Dermatology, Nanchang 330001, China
| | - Zhiwei Xiong
- Dermatology Hospital of Jiangxi Province, Jiangxi Provincial institute of Dermatology, Nanchang 330001, China
| | - Seyedmojtaba Seyedmousavi
- Department of Medical Microbiology, Radboudumc, Nijmegen, The Netherlands Department of Medical Microbiology and Infectious Diseases, Erasmus MC, The Netherlands
| | - Weida Liu
- Institute of Dermatology, Chinese Academy of Medical Science & Peking Union Medical College, Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing 210042, China
| | - G Sybren de Hoog
- CBS-KNAW Fungal Biodiversity Centre, Utrecht, The Netherlands Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, The Netherlands
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