Infection Epidemiology and Microbiology
Infection Epidemiology and Microbiology
IEM
Medical Sciences
http://iem.modares.ac.ir
1
admin
2588-4107
2588-4115
10.61186/iem
en
jalali
1395
1
1
gregorian
2016
4
1
2
2
online
1
fulltext
en
Frequency of Different Malassezia Species in Scalp Dandruff
Background: Members of the <em>Malassezia</em> genus are often lipophilic, observed as budding yeasts and found as commensals in the skin of humans. This genus opportunistically reside in several areas including scalp where under the influence of particular predisposing factors, their proliferation is increased (e.g., high activation of sebaceous glands), and leads to dandruff and seborrheic dermatitis, which together affects >50% of human beings. The proliferation of yeasts in scalp creates health and hair hygiene problems. In this study we determined the type and frequency of <em>Malassezia</em> species in scalp dandruff in order to have epidemiologic and therapeutic understanding. Materials and Methods: Differentiation tests were done for scalp samples, including: morphology, Tween 20, 40 and 80 assimilation tests, hydrolysis of bile-esculin, catalase and growth on Sabouraud dextrose agar with chloramphenicol and cycloheximide (SCC) and sediment production on mDixon agar medium. Results: Frequency of various <em>Malassezia</em> species from 140 scalp samples from volunteers of both gender were found as: <em>M. globosa</em> (46.5%), followed by <em>M. furfur </em>(27.0%), <em>M. restricta</em> (12.7%)<em>, M. sympodialis</em> (6.5%) and <em>M. slooffiae</em> (0.8%). Conclusion: In view of high prevalence of<em>M. globosa, </em>its invasive characteristics and the role of predisposing factors in the more proliferation of this species in scalp should be considered.
Malassezia,Scalp,Dandruff
22
25
http://iem.modares.ac.ir/browse.php?a_code=A-4-1000-3359&slc_lang=en&sid=4
Mahdi
Zareei
Mahdi
Zareei
100319475328460061116
100319475328460061116
No
Department of Medical Mycology, School of Public Health and Institute of Public Health Research, Tehran University of Medical Sciences, Tehran, IR Iran
Department of Medical Mycology, School of Public Health and Institute of Public Health Research, Tehran University of Medical Sciences, Tehran, IR Iran
Alireza
Mohammadi
Alireza
Mohammadi
100319475328460061117
100319475328460061117
No
Department of Disease Control, Komijan Treatment and Health Network, Arak University of Medical Science, Arak, IR Iran
Department of Disease Control, Komijan Treatment and Health Network, Arak University of Medical Science, Arak, IR Iran
Zeinab
Borjian Borujeni
Zeinab
Borjian Borujeni
100319475328460061118
100319475328460061118
No
Department of Medical Mycology, School of Public Health and Institute of Public Health Research, Tehran University of Medical Sciences, Tehran, IR Iran
Department of Medical Mycology, School of Public Health and Institute of Public Health Research, Tehran University of Medical Sciences, Tehran, IR Iran
Seyed Jamal
Hashemi
Seyed Jamal
Hashemi
100319475328460061119
100319475328460061119
Yes
Department of Medical Mycology, School of Public Health and Institute of Public Health Research, Tehran University of Medical Sciences, Tehran, IR Iran
Department of Medical Mycology, School of Public Health and Institute of Public Health Research, Tehran University of Medical Sciences, Tehran, IR Iran