Epidemiology of dermatophytoses in 31 municipalities of the province of Buenos Aires, Argentina: A 6-year study (original) (raw)

Epidemiology of Dermatophytoses in an Area South of Tehran, Iran

Mycopathologia, 2000

Dermatophyte infections have been considered to be a major public health problem in many parts of the world. The aim of this study was to identify the etiological and epidemiological factors of dermatophyte infections in an area south of Tehran. A total of 1254 patients suspected to have dermatophytic lesions were examined over a period of three years (1999)(2000)(2001). Material collected from skin, hair, and nails was submitted to direct microscopic examination using KOH, cultured in Sabouraud dextrose agar and microscopically examined for colony morphology, in order to the identify the 169 dermatophytes isolated. The prevalence of dermatophytoses was 13.5% (95% CI: 11.7-15.5%). Their incidence was 10.6 per 100,000 person-years (95% CI: 8.5-13.2). Epiderophyton floccosum was the most frequent dermatophyte isolated (31.4%) followed by Trichophyton rubrum (18.3%), T. mentegrophytes (17.2%), T. violaceum (16.6%), Microsporum canis (6.5%), T. verrucosum (4.7%) and M. gypseum (4.1%). Epidermophytes floccosum was found to be the most common isolated dermatophyte in age groups 20-29 (30.2%). Tinea corporis (31.4%) was the most common type of infection, followed by tinea cruris (20.7%), tinea manuum (15.4%), tinea capitis (12.4%), tinea pedis (10.6%), tinea faciei (7.1%), and tinea unguium (2.4%). The frequency rate of all of the types of tinea was higher in males than in females. The anthrophilic species E. floccosum was the most common dermatophyte as a causative agent of tinea. The most prevalent fungal infection was tinea corporis caused by E. floccosum.

Dynamics of dermatophytosis frequency in Mexico: an analysis of 2084 cases

Medical Mycology, 2010

We analysed 15,101 biological samples from patients presenting with superfi cial mycoses who attended outpatient services over a 10-year period. Scale samples were processed for direct microscopic examination with 15% KOH and cultured on Sabouraud glucose agar plus chloramphenicol and cycloheximide. Laboratory examination confi rmed 4,709 cases of superfi cial mycosis (31.18%), of which 2,084 (44.26%) were dermatophytoses. The species most frequently encountered was Trichophyton rubrum (71.2%), followed by T. tonsurans (6.9%), T. mentagrophytes (5.5%), Microsporum canis (4.5%) and Epidermophyton fl occosum (1.3%). The most frequent clinical form of dermatophytosis was tinea unguium (59.9%), followed by tinea pedis (24.5%). We demonstrate that the number of cases of T. rubrum is increasing in Mexico.

Dermatophytoses; epidemiology and distribution among urban and sub urban population

Background: Superficial mycoses or superficial cutaneous fungal infections are the most common mycotic infections worldwide, which involve outermost covering of skin and its appendages like hair and nail. The patients invariably try to neglect such type of infections and seek medical attention usually for cosmetic reasons and not because of discomfort. At least 10% of world's population has dermatophyte infection. Dermatophytes are by far the most significant cutaneous fungi because of their widespread involvement of population and their worldwide prevalence. The dermatophytes are a group of closely related keratinophillic fungi that invade keratinised tissues-skin, hair and nails of humans and animals to produce an infection called as dermatophytoses or ring worm. Dermatophytes colonise superficial dead or desquamating layers of skin and its appendages. Superficial mycoses have become a significant health problem affecting children, adolescents and adults in developing countries. The present study was planned to characterise the different dermatophytes, non dermatophytes, budding yeast like fungi and other fungi in various types of superficial mycoses cases and there distribution in urban and sub urban population. Specimens like skin, hairs and nail were collected and subjected to KOH wet mount preparation and culture on SDA further identification was done by LCB mount and slide culture technique. Out of 400 patients attending dermatology OPD various superficial fungal infection Specimens were collected and dermatophyte sps. were identified. T. tonsurans was the most common isolated spp from T.capitis. T. mentagrophytes was the most commonly isolated spp. from T.corporis. Candida sps. was isolated from T. cruris. NDM were isolated from T. pedis. From cases of T. unguium.

Epidemiological trends of dermatophytoses and dermatophytes in Jerusalem between 1954 and 1981

Mycopathologia, 1985

Data for dermatophyte infections analysed for five 3-year periods between 1954 to 1981 led to the following conclusions: (l) Tinea pedis, tinea cruris and tinea manuum showed an increase in the 50's and 60's and declined in the 70's; (2) Tinea unguium and tinea corporis showed an increase during the whole period; (3) At all these sites, the percentage of Trichophyton rubrum, the main etiologic agent, increased steadily over the periods while the percentage of Triehophyton mentagrophytes, the secondary etiological agent, decreased. Epidermophyton floccosum, the third etiological agent in these sites, showed no sharp fluctuations; (4) These three dermatophytes which show similar microclimatic requirements and favour the same microecological niches, were called 'glabrohydrophilic'. In tinea corporis they form a definite subset, their percentage being similar to that at other glabrous sites; (5) Tinea capitis was at its peak in the 50's, decreased sharply until the second half of the 70's, its main etiological agent being Trichophyton violaceum. Since 1979, an increase of tinea capitis occurred due to the newly introduced Microsporum canis; (6) Dermatophytes favouring scalp hair were called 'trichophilic'. In tinea corporis they form a definite subset, their percentage being similar to that of tinea capitis; (7) A comparison with other studies from this country shows that macroclimate (i.e. humid warm coastal climate compared with dry cooler inland-mountain climate) is not an important factor in the etiology of tinea.

A Clinico-Mycological Study of Dermatophytoses in Goa, India

Mycopathologia, 2014

The study was a clinico-mycological approach to find out the various clinical types of dermatophytoses and as well as the species of dermatophytes in Goa. Various socio-demographic and host factors were assessed to determine the predisposing factors for dermatophytoses. A detailed clinical history of the patients was recorded. Samples were collected aseptically in sterile black paper envelopes. The material was subjected to microscopy using potassium hydroxide mount. Culture was done by inoculating the material in Sabouraud's peptone glucose agar slants. Tinea corporis was found to be the most common clinical presentation (44.2 %). Among the dermatophytes, Trichophyton rubrum predominated (38.2 %), followed by Trichophyton mentagrophytes (27.2 %). Dermatophytoses was more common among the lower and upper lower strata of society. Majority of the patients were in the 21-40 years age group (62 %) with males predominating women in ratio 2.4:1.

A preliminary clinico-mycological study of dermatophytes infection

International Journal of Research in Medical Sciences

Background: Superficial fungal infections are the most common skin diseases, affecting millions of people throughout the world. Aim of the study was carried out to find, the effect of seasonal variation and socio-economic status on the prevalence of dermatophytes.Methods: A total of fifty clinically suspected cases of dermatophytosis were subjected to mycological studies.Results: Out of which 32 (64%) were culture positive Tinea corporis was the most common clinical type followed by Tinea cruris. Tricophoton rubrum 17/32 (53.12%) was the most common isolate followed by T. mentagrophytes 9/32(28.12%), T. tonsurans 3/32(9.37%), T. verrrucosum 2/32(6.25%) and T. schoenleinii 1/32(3.12%). Most of the patients belonged to the middle socio-economic group (28/50) followed by lower socio-economic group (19/50) maximum cases of dermatophytosis were reported from June to August revealing the fact that hot and humid weather during the monsoons has a great impact on the occurrence of dermatophy...

A 10-Year Study of Dermatophytoses in Isfahan, Iran

Journal of Clinical Laboratory Analysis, 2015

Dermatophyte infections are very common worldwide and their epidemiological characteristics vary according to the geographical region and have altered in the last decades. The aim of the present investigation was to determine the diversity of causative agents of dermatophytoses and describe the epidemiological condition of infection in Isfahan, Iran, between 2003 and 2012. Specimens were collected from hair, nail, and skin and were examined by conventional methods such as direct microscopy, culture on sabouraud dextrose agar with chloramphenicol and cycloheximide (Mycosel agar) and sabouraud glucose agar, Trichophyton agars, growth on rice grains, urease test, and hair perforation test. Of 13,469 clinically suspected cases, 11.5% were affected with dermatophytoses. Tinea capitis was the most frequent form of infection (52.7%), followed by tinea corporis (24%), tinea pedis (8.9%). Trichophyton verrucosum was the most prevalent causative agent (40.6%), followed by T. mentagrophytes var. interdigitale (17.6%), Epidermophyton floccosum (13%), T. violaceum (12%), T. rubrum (4.1%). Age range of patients was between 1 and 80 years. Housewives were the most patients in our study. The study emphasizes importance of epidemiological surveys of dermatophyte species for the better management of infection.

Dermatophyte agents in the city of São Paulo, from 1992 to 2002

Revista do Instituto de Medicina Tropical de São Paulo, 2003

Dermatophytosis are superficial mycoses caused by fungi that can invade stratum corneum and keratinized tissues. In order to study the frequency of dermatophytes species and the clinical manifestations caused by these fungi, in São Paulo, SP, Brazil, the authors analyzed cultures isolated at the Mycology Laboratory from a selected population (15,300 out-patients of the Hospital das Clínicas, Department of Dermatology, Faculty of Medicine of University of São Paulo) from January 1992 to June 2002. The most prevalent dermatophyte was Trichophyton rubrum (48.7%), followed by Microsporum canis (20.9%), Trichophyton tonsurans (13.8%), Trichophyton mentagrophytes (9.7%), Epidermophyton floccosum (4.1%), and Microsporum gypseum (2.5%). These agents determined more than one clinical manifestation, i.e., tinea corporis (31.5%), tinea capitis (27.5%), tinea unguium (14.8%), tinea cruris (13.9%), tinea pedis (9.9%), and tinea manuum (1.9%). Clinical variants of dermatophytosis and their relati...