On the other hand, it can be related to resistant fungal species or the presence of dormant arthroconidia
in the nail bed as a reservoir for recurrent infection .
The microscopic result is generally considered positive when finding arthroconidia
, conidia, or hyphae.
Lesions were examined at microscope by X40 magnification, and in case non-living, densely branched and sectioned hyphae with hyaline hypha and/or arthroconidia
chains were observed, they were assessed as "positive fungal test in direct microscopic examination".
Its saprophyte form grows as elongated and septated hyphae, which liberate arthroconidia
responsible for infection when they are weakened.
After incubation, the lid of the petri plate was removed and the edge of the cover slip was observed under the microscope (10X and 40X objectives) for typical morphological features like yeast cells, hyphae, pseudohyphae, chlamydospores or arthroconidia
along with budding yeast cells for Trichosporon spp.
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.
As the mycelia mature, arthroconidia
are formed which become airborne and either return to the soil or are inhaled.
Classification and severity of Tinea capitis depends on how fungus invades the hair shaft and the formation of their arthroconidia
.6 There are three recognised patterns: Endothrix where the hair shaft is filled with fungal branches (hyphae) and spores (arthroconidia
) clinically termed black dot.
This was then heated gently (for about five minutes) to soften it and it was then examined for the presence of hyphae and/or arthroconidia
under low (X10) and high (X40) power objective.
Fungal hyphae and spores (arthroconidia
) are then conveniently disclosed.
Coccidioides imitis is a dimorphic fungus that is transmitted by inhalation or direct inoculation of arthroconidia
. It disseminates via direct lung parenchymal invasion into the vasculature or by macrophages in the lymphatics.
Posadas-Wernicke disease is a systemic mycosis caused by of dust particles containing Arthroconidia
of Coccidioides immitis.