Microsporum canis scalp ringworm: its primary or secondary ectothrix character

This study supports the view that, in cases of tinea capitis due to a Microsporum canis infection, ectothrix arthroconidium formation is extrapilary and arises from intrapilary hyphae. The hyphae of M. canis perforate and digest the hair cuticle to alter its appearance from a normally identifiable s...

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Bibliographic Details
Published inScanning microscopy Vol. 7; no. 2; p. 671
Main Author Vismer, H F
Format Journal Article
LanguageEnglish
Published United States 01.06.1993
Subjects
Child
Dermatomycoses - microbiology
Dermatomycoses - pathology
Female
Hair - microbiology
Hair - ultrastructure
Humans
Microscopy, Electron, Scanning
Microsporum
Tinea Capitis - microbiology
Tinea Capitis - pathology
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Summary:This study supports the view that, in cases of tinea capitis due to a Microsporum canis infection, ectothrix arthroconidium formation is extrapilary and arises from intrapilary hyphae. The hyphae of M. canis perforate and digest the hair cuticle to alter its appearance from a normally identifiable structure of imbricated cells with a distal free border, to a grossly altered and pathological layer. Conidium production mainly takes place outside the hair shaft and forms thick clusters between the cuticular tiles. Finally, a shaft of conidia is formed around the hair. The cuticular covering of such a conidium sheath belongs to the root sheath of the hair follicle, and not to the hair structure proper.
ISSN:0891-7035