Citation Information :
Thayikkannu A, Kindo A, Veeraragahavan M. Characterisation of Malassezia species and their clinical correlation in a tertiary healthcare centre in South India. 2013; 15 (2):49-53.
Genus Malassezia consists of 14 species of yeast like fungi that commonly causes superficial mycoses. It is a topic of intense interest but its fastidious nature restricts its research. Speciation gives us better treatment strategies especially with global concern over high Minimum Inhibitory Concentrations (MICs) to anti-fungal agents and emerging resistance. Aim of the study was to speciate Malassezia using phenotypic methods and to analyse the risk factors and its clinical correlation. The study was conducted at our university teaching hospital in south India over a one year period after approval by the Institutional Ethics Committee. A total of 105 patients, who had skin lesions resembling diseases caused by Malassezia, were included. The skin scrapings were subjected to 10% KOH wet mount. Culture was put up on Sabouraud's dextrose agar (SDA), with and without olive oil overlay (SDA-O) and modified Dixon's agar. Gram's stain, catalase test, aesculin hydrolysis, Tween assimilation, temperature tolerance and Tween 40-based precipitate production were done to characterise Malassezia species. The most common age was 20-40 years, with a slight female predominance (58.1%). Among the study group (n = 105), 87 had the prototype disease - pityriasis versicolour (PV). Out of 105 patients, 62.9% were fresh cases and 37.1% came with recurrences. The most common site to be affected by PV was the back, followed by chest. M. globosa was the most common species in both the hypopigmented and hyper pigmented groups. In three patients, two species were isolated from the same lesion. A sequential use of these simple tests helps greatly in a financially constrained set up for speciation of Malassezia in the laboratory.
Fast, non invasive method of molecular detection and differentiation of Malassezia yeast species on human skin and application of the method to dandruff microbiology. J Clin Microbiol 2002;40:3350-7.
Fungitoxicity of Zataria multiflora essential oil against various Malassezia species isolated from cats and dogs with Malassezia dermatitis. African J Microbiol Res 2011;5:1057-61.
Changes in sebum secretion and the sebaceous gland. Dermatol Clin 1986;4:419-23.
The Malassezia genus in skin and systemic diseases. Clin Microbiol Rev 2012;25:106-41.
Immunology of diseases associated with Malassezia species. Clin Microbiol Rev 2002;15:21-57.
Dandruff and seborrhoeic dermatitis: Causes and management Clin Exp Dermatol 1997;22:3-6.
Evaluation and treatment of Malassezi related skin disorders. Cosmet Dermatol 2011;24:137-45.
A simple PCR-RFLP method for identification and differentiation of 11 Malassezia species. J Microbiol Methods 2005;61:281-4.
Malassezia cuniculi sp. nov., a novel yeast species isolated from rabbit skin. Med Mycol 2011;49:40-8.
Precipitate production by some Malassezia species on Dixon's agar. Med Mycol 2000;38:105-7.
Mycology of pityriasis versicolor. J Mycol Med 1999;9:143-8.
Pityriasis versicolor: Socioeconomic and clinico-mycologic study in India. Int J Dermatol 2002;41:823-4.
Pityriasis (tinea) versicolor in infancy. Pediatr Dermatol 2002;5:260.
Pityriasis versicolor in a newborn. Mycoses. 1995;38:227-8.
Pityriasis versicolor in children: A retrospective study of 164 cases. Ann Dermatol Venereol 1998;125:581-4.
Malassezia globosa tends to grow actively in summer conditions more than other cutaneous Malassezia species J Dermatol 2012;39:613-6.
Tinea versicolor. Int J Dermatol 1998;37:648-55.
Cutaneous Malassezia microbiota in atopic dermatitis patients differ by gender and body part. Dermatology 2010;221:253-60.
Indian J Dermatol Venereol Leprol 2010;76:159-64.
Isolation of Malassezia globosa and M. sympodialis from patients with pityriasis versicolor in Spain. Mycopathologia 2002;154:111-7.
Identification of Malassezia species isolated from patients with seborrhoeic dermatitis, atopic dermatitis, pityriasis versicolor and normal subjects. Med Mycol 2000;38:337-41.
Identification of Malassezia species from pityriasis versicolor in Indonesia and its relationship with clinical characteristics. Mycoses 2009;52:257-62.