Abstract
Inactivation of Candida albicans by ultraviolet (uv) light is markedly dependent upon (a) the cell division stage and (b) the nutrition and growth temperatures of cells both before and after irradiation. Cells grown at 37°C after irradiation show lower survivals than those grown at 25°C. At either recovery temperature, cells which had been cultured before irradiation at 37°C are able to sustain less uv damage prior to inactivation than those cultured at 25°C. The radiosensitivities of budding and non-budding cells are the same when survivals are scored at 25°C; at low uv dosages, cells show slightly poorer recoveries on enriched medium than on minimal medium whereas at higher dosages, their recoveries on both kinds of media are equivalent. In contrast, at 37°C, uv treated non-budding cells are much more susceptible to inactivation than budding cells; non-budding cells also express much poorer recovery on enriched medium than on minimal medium at 37°C whereas budding cells survive equally well on either medium. Though non-budding cells grown for irradiation on minimal or enriched media exhibit the same radiosensitivites, budding cells grown for irradiation on enriched medium are more susceptible to inactivation at 37°C than those grown on minimal medium.
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