On this Mnemonic Monday, we challenge you to remember dermatophytosis of the hair (Endothrix) where spores are found on the outside of the hair shaft and do NOT fluoresce with Wood’s light with the following mnemonic:
Endothrix: “TV’s in the House”
T. tonsurans
T. violaceum
T. schoenleinii
Click HERE to print your mnemonic card.
Study More!
Need a refresher on Dermatophytes? Check out the following pages of your 2019 Derm In-Review Study Guide:
Endothrix: 114
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Further Reading
Check out the following article published in the Journal of Drugs in Dermatology (JDD):
Mycological Considerations in the Topical Treatment of Superficial Fungal Infections
Trichophyton rubrum remains the most common pathogenic dermatophyte in the United States, Europe, and industrialized Asia, although other species are predominant elsewhere. Candida albicans is the most common pathogenic yeast, with other species occasionally encountered. Just a few of the 14 described species of Malassezia cause pityriasis versicolor worldwide. FDA approval does not always accurately reflect the potential utility of any given topical antifungal agent. Azole, hydroxypyridone, and allylamine agents are beneficial in the management of dermatophytosis; however, the allylamines may lead to faster symptom resolution and a higher degree of sustained response. Although in actual clinical use the allylamines have all shown some activity against superficial cutaneous candidiasis and pityriasis versicolor, the azole agents remain drugs of choice. Ciclopirox is an excellent broad-spectrum antifungal agent. Optimal topical therapy for superficial fungal infections cannot yet be reliably based upon in-vitro laboratory determination of sensitivity. Inherent antibacterial and anti-inflammatory properties possessed by some antifungal agents may be exploited for clinical purposes. Candida species may be azole-insensitive due to efflux pumps or an altered target enzyme. The so-called “antifungal resistance” of dermatophytes is actually due to poor patient adherence (either in dosing or treatment duration), or to reinfection.
J Drugs Dermatol. 2016;15(Suppl 2):s49-55. Read the full article here.
Test your knowledge!
Which of the following dermatophytes causes endothrix tinea capitis?
A: Microsporum gypseum
B: Microsporum audouinii
C: Trichophyton tonsurans
D: Microsporum canis
E: Microsporum ferrugineum
To find out the correct answer and read the explanation, click here.
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