A Study on Mycological Pattern of Species Causing Tinea Capitis

Suvedha, M (2020) A Study on Mycological Pattern of Species Causing Tinea Capitis. Masters thesis, Madurai Medical College, Madurai.


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INTRODUCTION: Tinea capitis, an infection of scalp hair shaft and the surrounding skin, can be caused by all pathogenic dermatophyte except E.floccosum, T.concentricum and T.mentagrophytes var interdigitale. The synonyms of tinea capitis includes tinea tonsurans, ringworm of the scalp, ringworm of the hair or herpes tonsurans. Tinea capitis is predominantly an infection of children although adult cases are also rarely seen. The most common etiological agent of tinea capitis isolated worldwide is Microsporum canis, whereas in United States it is Trichophyton tonsurans and in South India the most reported species is Trichophyton violaceum. Species distribution and prevalence varies with the geographical area and is governed by environmental conditions, personal hygiene and individual’s susceptibility. AIM OF THE STUDY: To find the prevalence, epidemiological factors, clinical types, species identification and clinicoetiological correlation in cases of tinea capitis in Gov.Rajaji Hospital, Madurai. MATERIALS AND METHODS: This study was carried out in the department of Dermatology, Government Rajaji Hospital and Madurai Medical College, Madurai. A total of 70 cases, with a clinical diagnosis of tinea capitis was included in the study for a period of one yearfrom October 2018 to September 2019. All the cases were examined, scrapings and hair samples were visualized under potassium hydroxide mount and also subjected to culture in Modified Sabourauds agar, for the species identification. RESULTS: Non-inflammatory type (44.3%) of tinea capitis was the most commonly noted, among which grey patch type was the commonest. Among the inflammatory types, Kerion was the most commonly noted type. T.tonsurans (34%) was the most commonly identified species in our study followed by T.violaceum (25.5%). CONCLUSION: ◈ Tinea capitis is seen to occur predominantly in children, rarely affects adults. ◈ Boys have a relatively increased incidence of tinea capitis. ◈ The commonest age – group of tinea capitis in this study was 6 to 10 years of age. ◈ The personal habits such as sharing of combs, bed pillows, linens and caps was an associated risk factor in 44.2% of patients. ◈ Non - inflammatory type of tinea capitis is most commonly noted in our study. ◈ Grey patch type was the commonest among non-inflammatory types. ◈ Kerion was the commonest among inflammatory type. ◈ T.tonsurans was the most commonly isolated agent in our study, whereas previous reports states T.violaceum to the commonest agent. ◈ Of the non - inflammatory type, T.tonsurans was the predominant organism in our study. ◈ Among the inflammatory type, M.canis was the common agent. ◈ With relation to age, T.tonsurans is predominantly seen in paediatric age groups whereas T.rubrum was the common one among the adults. ◈ Contact with pet animals correlated with the growth of zoonotic species in our study, namely M.canis (80%). ◈ The clinicoetiological correlation done shows that a single etiological agent can give rise to multiple clinical types of tinea capitis. ◈ This study shows a changing trend of the species causing tinea capitis and hence further studies with a larger sample size is needed for analysing the changing pattern of species in different geographical locations.

Item Type: Thesis (Masters)
Additional Information: 201730104
Uncontrolled Keywords: Mycological Pattern, Species Causing, Tinea Capitis.
Subjects: MEDICAL > Dermatology Venereology and Leprosy
Depositing User: Subramani R
Date Deposited: 05 Feb 2021 02:36
Last Modified: 05 Feb 2021 02:36
URI: http://repository-tnmgrmu.ac.in/id/eprint/13874

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