title: Studies on the biological effects of deuteriated organic compounds. II. Morphological changes of Epidermophyton floccosum exposed to perdeuteriated n-hendecanoic acid studied with interference contrast and scanning electron microscopy.
abstract: In order to visualise the morphological changes of Epidermophyton floccosum associated with exposure to perdeuteriated n-hendecanoic acid, the architecture of the dermatophyte was investigated by means of interference contrast and scanning electron microscopy. The morphology of mycelia grown on substrate containing perdeuteriated n-hendecanoic acid, or the unlabelled analogue, was compared. The perdeuteriated n-hendecanoic acid produced a characteristic undulant effect of the hyphae. The characteristic wave-like appearance of the mycelia looked similar to the curling effect occuring after treatment of dermatophytes with griseofulvin, but was not so pronounced. Perdeuteriated n-hendecanoic acid, unlike the unlabelled analogue, also seems to cause a reduction of the number of chlamydospores perforations of the macroconidia. The changes in the morphological structure of Epidermophyton floccosum exposed to pereuteriated n-hendecanoic acid have been investigated. Morphological examination of mycelia exposed to this substance by interference contrast microscopy demonstrated a picture of defect hyphae and macroconidia. By the aid of scanning electron microscopy we have attempted to obtain a better visualization of these changes at ultrastructural level.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D003652:Decanoic Acids / Q000494:pharmacology*; D003903:Deuterium; D004821:Epidermophyton / Q000187:drug effects / Q000648:ultrastructure*; D008855:Microscopy, Electron, Scanning; D008857:Microscopy, Interference; D013172:Spores, Fungal / Q000187:drug effects / Q000648:ultrastructure
chemical_list: D003652:Decanoic Acids; D003903:Deuterium