S1 Guideline onychomycosis.

Onychomycosis is a fungal infection of the fingernails and toenails. In Europe, tinea unguium is mainly caused by dermatophytes. The diagnostic workup comprises microscopic examination, culture and/or molecular testing (nail scrapings). Local treatment with antifungal nail polish is recommended for mild or moderate nail infections. In case of moderate to severe onychomycosis, oral treatment is recommended (in the absence of contraindications). Treatment should consist of topical and systemic agents. The aim of this update of the German S1 guideline is to simplify the selection and implementation of appropriate diagnostics and treatment. The guideline was based on current international guidelines and the results of a literature review conducted by the experts of the guideline committee. This multidisciplinary committee consisted of representatives from the German Society of Dermatology (DDG), the German-Speaking Mycological Society (DMykG), the Association of German Dermatologists (BVDD), the German Society for Hygiene and Microbiology (DGHM), the German Society of Pediatric and Adolescent Medicine (DGKJ), the Working Group for Pediatric Dermatology (APD) and the German Society for Pediatric Infectious Diseases (DGPI). The Division of Evidence-based Medicine (dEBM) provided methodological assistance. The guideline was approved by the participating medical societies following a comprehensive internal and external review.

[Scabies-Renaissance of an ectoparasite infection : Diagnosis and therapy-How to proceed in practice]. / Skabies ­ Renaissance einer Ektoparasitose : Diagnostik und Therapie ­ Vorgehen in der Praxis.

Scabies or mange is currently a common dermatosis in Germany and other countries, and should be more important in health policy. It affects a cross-section of society, including all age groups, from infants to the aged. Locals and people with a migration background both suffer from this highly contagious ectoparasite infection with excessive, predominately nocturnal itching. Clinical diagnosis represents a challenge for the experienced dermatologist due to the variety of dermatosis to be considered in the differential diagnosis. It is still unclear whether treatment failure or the recurrences observed everywhere are due to in vitro and in vivo resistance of the pathogen agent Sarcoptes scabiei against permethrin or ivermectin. Therapeutic errors seem to play a role as often not all direct contact persons are recorded and treated with antiscabious treatment. They form the reservoir for reinfections. In the event of repeated nonresponse to topical (permethrin) and/or oral antiscabious treatment, alternative topical preparations-benzyl benzoate or crotamiton-should be used. Combination with ivermectin is mandatory.

S1 guidelines: Tinea capitis.

Tinea capitis describes a dermatophyte infection of scalp and hair that predominately occurs in children. The diagnostic workup includes microscopic examination, culture and/or molecular tests. Treatment is guided by the specific organism involved and should consist of systemic agents as well as adjuvant topical treatment. The aim of the present update of the interdisciplinary German S1 guidelines is to provide dermatologists, pediatricians and general practitioners with a decision tool for selecting and implementing appropriate diagnostic and therapeutic measures in patients with tinea capitis. The guidelines were developed based on current international guidelines, in particular the 2010 European Society for Pediatric Dermatology guidelines and the 2014 British Association of Dermatologists guidelines, as well as on a review of the literature conducted by the guideline committee. This multidisciplinary committee consists of representatives from the German Society of Dermatology (DDG), the German-Speaking Mycological Society (DMykG), the German Society for Hygiene and Microbiology (DGHM), the German Society of Pediatric and Adolescent Medicine (DGKJ) and the German Society for Pediatric Infectious Diseases (DGPI). The Division of Evidence-based Medicine (dEBM) provided methodological assistance. The guidelines were approved by the participating medical societies following a comprehensive internal and external review.

Mycology - an update Part 3: Dermatomycoses: topical and systemic therapy.

Treatment of dermatophyte infections is based on the clinical picture and mycological detection of the causative pathogen. Based on the appropriate indication, onychomycosis can be treated topically using an antimycotic nail lacquer. Atraumatic nail abrasion with 40 % urea ointment has a beneficial effect on healing. Continuous treatment of onychomycosis with terbinafine represents the most effective systemic therapy. Terbinafine or itraconazole are the safest and most effective antimycotic agents for the treatment of onychomycosis in children. For laser therapy of onychomycosis, only a few studies on clinical efficacy are available. Regarding tinea capitis, targeted species-specific therapy of dermatophytosis of the scalp is currently recommended. Terbinafine, yet also itraconazole and fluconazole, are effective in tinea capitis caused by Trichophyton species. Microsporum infections of the scalp are preferably treated with griseofulvin, alternatively with itraconazole or fluconazole. Terbinafine is less effective. Candidal intertrigo are topically treated with nystatin, but azoles or ciclopirox olamine are also suitable candidates. Systemically, fluconazole or itraconazole are used. Topical and systemic antimycotics are equivalent forms of therapy in acute vulvovaginal mycosis. Fluconazole is the drug of choice in chronic recurrent vulvovaginal mycosis caused by Candida albicans. Ketoconazole shows very good efficacy in tinea versicolor. With respect to systemic treatment of severe and widespread tinea versicolor, itraconazole is the drug of choice.

Mycology - an update. Part 1: Dermatomycoses: causative agents, epidemiology and pathogenesis.

Dermatomycoses are caused most commonly by dermatophytes. The anthropophilic dermatophyte Trichophyton rubrum is still the most frequent causative agent worldwide. Keratinolytic enzymes, e.g. hydrolases and keratinases, are important virulence factors of T. rubrum. Recently, the cysteine dioxygenase was found as new virulence factor. Predisposing host factors play a similarly important role for the development of dermatophytosis of the skin and nails. Chronic venous insufficiency, diabetes mellitus, disorders of cellular immunity, and genetic predisposition should be considered as risk factors for onychomycosis. A new alarming trend is the increasing number of cases of onychomycosis - mostly due to T. rubrum - in infancy. In Germany, tinea capitis is mostly caused by zoophilic dermatophytes, in particular Microsporum canis. New zoophilic fungi, primarily Trichophyton species of Arthroderma benhamiae, should be taken into differential diagnostic considerations of tinea capitis, tinea faciei, and tinea corporis. Source of infection are small household pets, particularly rodents, like guinea pigs. Anthropophilic dermatophytes may be introduced by families which immigrate from Africa or Asia to Europe. The anthropophilic dermatophytes T. violaceum, T. tonsurans (infections occurring in fighting sports clubs as "tinea gladiatorum capitis et corporis") and M. audouinii are causing outbreaks of small epidemics of tinea corporis and tinea capitis in kindergartens and schools. Superficial infections of the skin and mucous membranes due to yeasts are caused by Candida species. Also common are infections due to the lipophilic yeast fungus Malassezia. Today, within the genus Malassezia more than 10 different species are known. Malassezia globosa seems to play the crucial role in pityriasis versicolor. Molds (also designated non-dermatophyte molds, NDM) are increasingly found as causative agents in onychomycosis. Besides Scopulariopsis brevicaulis, several species of Fusarium and Aspergillus are found.

Mycology - an update part 2: dermatomycoses: clinical picture and diagnostics.

Most fungal infections of the skin are caused by dermatophytes, both in Germany and globally. Tinea pedis is the most frequent fungal infection in Western industrial countries. Tinea pedis frequently leads to tinea unguium, while in the elderly, both may then spread causing tinea corporis. A variety of body sites may be affected, including tinea glutealis, tinea faciei and tinea capitis. The latter rarely occurs in adults, but is the most frequent fungal infection in childhood. Following antifungal treatment of tinea unguium and also tinea capitis a dermatophytid or hyperergic reaction to dermatophyte antigens may occur. Yeast infections affect the mucous membranes both of the gastro-intestinal system and the genital tract as candidiasis mostly due to Candida albicans. Cutaneous candidiasis affects predominantely the intertriginous regions such as groins and the inframammary area, but also the intertriginous space of fingers and toes. In contrast, pityriasis versicolor is a superficial epidermal fungal infection primarily on the the trunk. Mold infections are rare in dermatology; they play a role nearly exclusively in nondermatophyte-mold (NDM) onychomycosis. The diagnosis of dermatomycoses comprises the microscopic detection of fungi using the potassium hydroxide preparation or alternatively the fluorescence optical Blankophor preparation together with culture. The histological fungal detection with PAS staining possesses a high sensitivity, and it should play a more important role in particular for diagnosis of onychomycosis. Molecular biological methods, based on the amplification of fungal DNA with use of specific primers for the distinct causative agents are on the rise. With PCR, such as dermatophyte-PCR-ELISA, fungi can be detected directly in clinical material in a highly specific and sensitive manner without prior culture. Today, molecular methods, such as Matrix Assisted Laser Desorption/Ionization Time-Of-Flight Mass Spectrometry (MALDI TOF MS) as culture confirmation assay, complete the conventional mycological diagnostics.

Onychomycosis: modern diagnostic and treatment approaches.

The medical term onychomycosis should be understood as chronic infection of the nails caused by a fungus. The most common causative agents are the dermatophytes and Candida species. The less common are certain types of moulds (nondermatophyte moulds or NDMs). In approximately 60-80 % of the cases, onychomycosis is due to dermatophytes. Among dermatophytes, the most often isolated causative pathogen is Trichophyton (T.) rubrum. Other common species are T. interdigitale (formerly T. mentagrophytes), Epidermophyton floccosum, and T. tonsurans. The most significant yeasts causing onychomycosis are Candida albicans and Candida parapsilosis. Predisposing factors for onychomycosis include mainly diseases such as diabetes mellitus, peripheral vascular arterial disease, chronic venous insufficiency, polyneuropathies of diverse etiologies, and immunosuppression, e.g., myeloproliferative diseases (such as lymphoma and paraproteinemia), HIV/AIDS, etc. Other factors facilitating the fungal infection are frequent trauma in professional sportsmen, often accompanied by excessive perspiration. The diagnostic methods that are often applied in different dermatologic departments and ambulatory units are also different. This precludes the creation of a unified diagnostic algorithm that could be used everywhere as a possible standard. In most of the cases, the method of choice depends on the specialist's individual experience. The therapeutic approach depends mostly on the fungal organism identified by the dermatologist or mycologist. This review hereby includes the conventional as well as the newest and most reliable and modern methods used for the identification of the pathogens causing onychomycosis. Moreover, detailed information is suggested, about the choice of therapeutic scheme in case whether dermatophytes, moulds, or yeasts have been identified as causative agents. A thorough discussion of the schemes and duration of the antifungal therapy in certain groups of patients have been included.

Prevalence of tinea capitis in Southeastern Austria between 1985 and 2008: up-to-date picture of the current situation.

Tinea capitis is the most common dermatophyte infection in childhood, but may rarely occur in adults and the elderly. Causative agents vary within different geographical areas as well as during decades. The aim of this study was to evaluate the prevalence and causative agents of tinea capitis in Southeastern Austria. Retrospective analysis of 714 patients diagnosed with tinea capitis seen at the outpatient Department of Dermatology/Medical University of Graz during the time period 1985-2008 was carried out. A total of 517 of the 714 patients were children, 21 adults and in the case of 176 patients age was not available. Microsporum canis was found in 84.4%. Trichophyton soudanense tinea capitis is seen since 1998, Trichophyton tonsurans for the first time in 2008. Tinea capitis has become very important for the public health. Besides an increasing incidence, there is a change in age of the patients affected and with the pattern of causative agents as a result of immigration movements and lifestyle habits mainly influenced by domestic pets. Our situation reflects nearly the epidemiology of the bordering countries of Austria mainly in the Southeastern surroundings. These epidemiological changes are a challenge for general practitioners, dermatologists and veterinarians to work close together for advice on control, early diagnosing and adequate treatment.

Subcutaneous phaeohyphomycosis in immunocompetent patients: two new cases caused by Exophiala jeanselmei and Cladophialophora carrionii.

Phaeohyphomycosis is a distinct mycotic infection of the skin or internal organs caused by darkly pigmented (dematiaceous) fungi, which are widely distributed in the environment. Phaeohyphomycosis is most frequently an opportunistic infection in immunosuppressed patients (HIV, corticotherapy, transplant patients) or is frequently associated with chronic diseases and diabetes. The spectrum of the disease is broad and includes superficial infections, onychomycosis, subcutaneous infections, keratitis, allergic disease, pneumonia, brain abscesses and disseminated disease. Rarely, immunocompetent patients may be affected. We describe two new cases of subcutaneous phaeohyphomycosis in immunocompetent patients: in the first patient, the causative agent was Exophiala jeanselmei, a common cause of phaeohyphomycosis; and in the second, Cladophialophora carrionii, which could be identified by culture. Cladophialophora carrionii is mainly the aetiological agent of chromoblastomycosis and only rarely the cause of phaeohyphomycosis. The first patient was treated with surgical excision and oral itraconazole, and the second patient responded to oral itraconazole only. Lesions improved in both patients and no recurrence was observed at follow-up visits.

Treatment of tinea capitis - a critical appraisal.

Griseofulvin has been introduced in 1958, ever since it remained the gold standard for the treatment of tinea capitis in the United States. Despite the availability of new antifungals like terbinafine, itraconazole and fluconazole -with few exceptions not licensed for their use in children - duration of tinea capitis treatment could not be shortened. The reasons therefore are the anatomic structure of the hair follicle, the dormant sebum-production before onset of puberty, and the way of action of the new antifungals. Although data concerning the pharmacokinetics of allylamines and triazoles in childhood-populations are lacking, some experience confirms a correlation of the way of action of modern antifungals and the causative pathogen. In children the treatment of Microsporum infections of the scalp is crucial. That may be explained by the unique pharmacokinetic features of the substance of terbinafine: Terbinafine neither can be excreted by sweat nor by sebum before onset of puberty. Terbinafine is incorporated in the keratin of mature terminal hair in the anagen phase. In children it will not be built in the hair shaft and therefore it will not reach the surface of the scalp where the sheets of arthro-conidia in microsporosis are located. This peculiar fact was not yet considered in clinical studies.

Cutaneous mycotic infections with pseudolymphomatous infiltrates.

We report on 3 patients with cutaneous mycotic infections (superficial dermatophytosis, 1 patient; trichophytia, 2 patients), who on histological examination revealed dense, superficial, and deep lymphoid infiltrates admixed with variable numbers of eosinophils and with large, atypical-looking, partly CD30-positive lymphocytes. All 3 patients had received steroid therapy (locally and/or orally) upon a clinical misdiagnosis of granuloma annulare. This unusual histopathologic presentation of cutaneous mycotic infections may be mistaken for a lymphoproliferative disorder, particularly for lymphomatoid papulosis.