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Microsporum canis scalp ringworm: its primary or secondary ectothrix character
1Medical Research Council, PROMEC, Tygerberg, South Africa.
Scanning Microscopy
|June 1, 1993
Summary
Microsporum canis causes tinea capitis by forming ectothrix arthroconidia outside the hair shaft. These fungal structures digest the hair cuticle, altering its appearance and leading to infection.
Area of Science:
- Mycology
- Dermatology
- Infectious Diseases
Background:
- Tinea capitis is a fungal infection of the scalp.
- Microsporum canis is a common cause of tinea capitis in humans and animals.
Observation:
- This study investigates the morphological changes in hair infected with Microsporum canis.
- Ectothrix arthroconidium formation was observed to be extrapilar, originating from intrapilar hyphae.
Findings:
- Microsporum canis hyphae perforate and digest the hair cuticle, causing pathological alterations.
- Conidia primarily form outside the hair shaft in dense clusters between cuticular scales.
- A sheath of conidia forms around the hair, with the covering originating from the hair follicle's root sheath.
Implications:
- Understanding the mechanism of M. canis infection can aid in developing targeted treatments for tinea capitis.
- This research clarifies the origin of the conidial sheath, distinguishing it from the hair structure itself.