La tiña del cuero cabelludo se debe a una de diferentes variedades de hongos tipo moho llamados dermatofitos. Los hongos atacan la capa. Esta especie es poco frecuente como causa de dermatofitosis en el hombre, descrita, sobre todo, en tiña Sociedad Argentina de Pediatría. Frecuencia y etiología de la dermatofitosis en niños de entre 0 y 12 años en el y la etiología de las dermatofitosis en niños de 12 años de edad o menores.
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Few scientific studies have evaluated dermatophytosis among children in the state of Amazonas or in the greater northern region of Brazil. The aim of this study was to research the frequency and aetiology of dermatophytosis in children age 12 and under, who were seen between March and November at the Mycology Laboratory of the National Institute of Amazonian Research.
A portion of this material was treated with potassium dermatofitksis for direct examination, and another portion was cultivated in Mycobiotic Agar for the isolation of dermatophytes. Of the samples analysed, showed positive diagnoses by direct dermatofitowis and cultivation. Tinea capitis cases was the most frequent type of dermatophytosis, and Trichophyton tonsurans cases was the most frequently isolated fungal agent.
[Tinea capitis by Microsporum gypseum, an infrequent species].
Tinea corporis was observed in 48 cases where the most frequently isolated fungal agent was also T. The laboratory confirmed tinea pedis in 6 cases, and the principal fungal agents isolated were Trichophyton rubrum 3 and Trichophyton mentagrophytes 3. The presence of tinea cruris was confirmed in 3 cases, and T. The children examined were primarily affected by tinea periatria, and the main fungal agent for this dermatophytosis was T. Dermatophytoses are superficial fungal infections of keratinized tissues that are caused by a group of fungi called dermatophytes.
These fungi belong to the genera EpidermophytonMicrosporum and Trichophyton. Dermatophytes from each of these three groups can cause infection in humans, but their reservoirs have important epidemiological implications for infection, including the infected site and the distribution of the infection.
The distribution of dermatophytes varies by region 2—7 which is influenced by factors such as climatic variation, socio-economic status, contact with domestic animals and the age of the population. With respect to the epidemiological characteristics of the clinical forms of dermatophytosis worldwide, the following relationships can be drawn: In general, health professionals in the state of Amazonas-Brazil tend to believe that the frequency of people affected by dermatophytosis is greater in the northern region of Brazil than in the other regions of the country.
The climatic and sanitary conditions, as well as the sub-standard medical treatment, present throughout the Amazon region, are important factors. Furthermore, few studies have evaluated the frequency and aetiology of dermatophytosis in children, and no studies have been published on this issue in the state of Amazonas and the northern region of Brasil. The aim of this study was to investigate the frequency and aetiology of dermatophytosis in children age 12 and under who were seen over a period of 10 years at the Laboratory of Mycology of the National Institute for Amazon Research Pdeiatria.
The biological samples used for the laboratory diagnosis were obtained from skin lesions, nails and the scalp. The identification of the cultured fungal agent was based on macro- and micromorphological characteristics.
In this study, the clinical forms of dermatophytosis observed included tinea capitis, tinea peditria, tinea cruris, tinea pedis and tinea unguium. Among the suspected cases of dermatophytosis, pediatriaa Table 1 shows the occurrence of dermatophytosis by clinical forms and sex.
Occurrence of dermatophytosis by clinical forms and sex. With respect pediatriaa the distribution of pediaatria clinical forms of dermatophytosis, The two main causative agents were Trichophyton tonsurans cases and Microsporum canis 24 cases Table Dermatophytes isolated from different types of tinea infection. Tinea corporis had the second highest rate of occurrence, and the percentage of affected patients was similar eermatofitosis both sexes.
The laboratory confirmed 6 cases of tinea pedis, and the main agents pediqtria T. Tinea cruris was confirmed in 3 cases. The annual occurrences of the dermatophyte species isolated from dermatofirosis of dermatophytosis are presented in Table 3.
From the dermatophytes identified, T. The causative agents for dermatophytosis showed similar occurrence rates pdeiatria the years of the study Table Annual occurrence of the different dermatophyte species.
In this study, In other studies, this percentage has varied from Concerning the epidemiology of infection, several dermatofitksis have shown that dermatophytosis dermxtofitosis most frequently in children who are 12 years and younger, 1,2,11,13 which can be attributed to factors such as inadequate personal hygiene habits, high density pedjatria schools and daycare centres, direct contact with domestic animals, contact with sand, immature immune responses and the absence of protective factors in the skin.
Concerning the clinical forms of ringworm, tinea capitis is the most common form in children. The data from this study agree with the published literature; of the cases of dermatophytosis that were detected, were tinea capitis, and of these cases were caused by T. This anthropophilic species was originally brought to the Americas during colonization, and has become cosmopolitan and now causes endothrix infections and small outbreaks in schools, preschools and nursing homes.
Tinea corporis is the most common clinical form of dermatophytosis in adults.
The body areas most commonly affected were the thorax, the arms, and the legs. In the present work, the main causative agents of the clinical form were T. Other studies have shown T. Specifically, in the Amazon region, pediztria closed shoes can create a moist environment that facilitates the growth of dermatophytes, whereas open shoes can inhibit the development of tinea pedis.
Although few cases of tinea cruris were diagnosed, the fungal agents T. This low incidence deratofitosis tinea cruris was also reported in previous studies. Studies reported in the literature have shown that the frequencies of the causative agents for dermatophytoses change over time. However, studies between and showed that T.
It is important to remark that during this long period of the study no cases of superficial mycoses caused by Scytalidium spp. These agents were only isolated in our laboratory as causative agents of nail infections in adults.
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We are taking the opportunity to declare that: The authors have no conflict of interest to declare. Frequency and aetiology of dermatophytosis pediatrka children age pexiatria and under in the state of Amazonas, Brazil. Background Few scientific studies have evaluated dermatophytosis among children in the state of Pediatriz or in the greater northern region of Brazil. Aims The aim of this study was to research the frequency and aetiology of dermatophytosis in children age 12 and under, who were seen between March and November at the Mycology Laboratory of the National Institute cermatofitosis Amazonian Research.
A portion of this material was treated with potassium hydroxide for direct examination, and another portion was cultivated in Mycobiotic Agar for the isolation of dermatophytes. Results Of the samples analysed, showed positive diagnoses by direct examination and cultivation. Conclusions The children examined were primarily affected by tinea capitis, and the main fungal agent for this dermatophytosis was T. Furthermore, few studies have evaluated the frequency and aetiology of dermatophytosis in children, and no studies have been published on this issue in the state of Amazonas and the northern region of Brasil.
The aim of this study was to investigate the dermatofitosie and aetiology of dermatophytosis in children age 12 and under who were seen over a period of 10 years at the Laboratory of Mycology of the National Institute for Amazon Research INPA.
Table 1 shows the occurrence of dermatophytosis by clinical forms and sex.
[Tinea capitis by Microsporum gypseum, an infrequent species].
Occurrence of dermatophytosis by clinical forms and sex. Dermatophytes isolated from different types of tinea infection.
Annual occurrence of the different dermatophyte species. Epidemiological trends in skin mycoses worldwide. Mycoses, Berlim, 51pp. Updates on the epidemiology of dermatophyte infections. Mycopathologia,pp.
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Guide for identification of Fungus, Actinomycetes and Algae of medical interest, Sarvier, Dermatophytes—their recognition and identification. University of Miami Press, Ecology and epidemiology of dermatophyte infections.
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