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Infecting Mice with Malassezia spp. to Study the Fungus-Host Interaction
Published on: November 6, 2019
Malassezia-Can it be Ignored?
Ambujavalli Balakrishnan Thayikkannu1, Anupma Jyoti Kindo1, Mahalakshmi Veeraraghavan2
1Department of Microbiology, Sri Ramachandra University, Porur, Chennai, Tamil Nadu, India.
Abstract:
Genus Malassezia comprises of 14 species of "yeast like fungi," 13 of which are lipophilic and 1 is nonlipophilic. They are known commensals and in predisposed individuals they commonly cause a spectrum of chronic recurrent infections. They rarely also cause serious illnesses like catheter-related blood stream infections, CAPD associated peritonitis etc., Though these fungi have been known to man for over 150 years, their fastidious nature and cumbersome culture and speciation techniques have restricted research. Since the last taxonomic revision, seven new species have been added to this genus. Their ability to evade the host immune system and virulence has increased the spectrum of the diseases caused by them. These agents have been implicated as causal agents in common diseases like atopic dermatitis recently. Though culture-based research is difficult, the new molecular analysis techniques and facilities have increased research in this field such that we can devote more attention to this genus to study in detail, their characteristics and their growing implications implications in the clinical scenario.
Insights
Malassezia yeasts are common fungi that cause skin infections in susceptible individuals. Advances in molecular techniques are improving research into their role in various diseases.
Area of Science:
- Medical Mycology
- Dermatology
- Infectious Diseases
Background:
- Malassezia yeasts are lipophilic fungi, with 14 known species, commonly found as commensals.
- They cause chronic, recurrent infections in predisposed individuals and rarely severe systemic illnesses.
- Despite being known for over 150 years, research has been limited by cultivation challenges.
Purpose of the Study:
- To highlight the expanding role of Malassezia yeasts in clinical scenarios.
- To emphasize the impact of recent taxonomic revisions and new species identification.
- To underscore the importance of molecular techniques in overcoming research limitations.
Main Methods:
- Review of existing literature on Malassezia taxonomy and clinical significance.
- Discussion of challenges in traditional culture-based research methods.
- Emphasis on the application of modern molecular analysis techniques.
Main Results:
- Seven new Malassezia species have been identified since the last revision, increasing the total to 14.
- Malassezia's immune evasion and virulence contribute to a broader spectrum of diseases.
- Recent studies implicate Malassezia in common conditions like atopic dermatitis.
Conclusions:
- Molecular techniques are crucial for advancing Malassezia research, overcoming previous limitations.
- Further investigation into Malassezia characteristics and clinical implications is warranted.
- Understanding Malassezia is increasingly important for managing various dermatological and systemic infections.
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