While invading hair, the dermatophytes follow one of several precise patterns of growth: In small spore ectothrix type of hair invasion, for example by M.
In large spore ectothrix type, for example by Trichophyton verrucosum and T.
This type of violent reaction is usually caused by ectothrix Trichophyton (T.
Of these 68 positive cases, 51 (75%) were of endothrix type, 12 cases of ectothrix type and 5 positive cases of spores were seen but exact position could not be determined.
On the other hand, the observations of fungal filaments with Arthroconidia, Ectothrix
or Endothrix, and the fungal filaments in hair shaft were indicative of the Dermatophytosis and Tinea Faciei.
when the hyphae and spores cover the outside of hair.
The samples were kept for 20 minutes and then examined for the presence of ectothrix
or endothrix spores in addition to filamentous, septate, branched hyphae with or without arthrospores and trichospores.
The following year Gruby described Trichophyton ectothrix, another fungi, found at the roots of a man's beard.
The second way is ectothrix in which fungal growth occurs within the hair shaft but also produces spores on the outside of the hair.
The presence of fungal spores indicates an ectothrix fungal infection; however, interpretation is difficult as a result of confusion with melanin granules or saprophytic fungi.
canis, an ectothrix
, grow on the outside of the hair shaft and produce a substance that fluoresces green under a Wood's Lamp.