Which organism is associated with the spaghetti-and-meatballs appearance in skin scrapings?

Which organism is associated with the spaghetti-and-meatballs appearance in skin scrapings?

• A. Malassezia furfur
• B. Candida albicans
• C. Trichophyton rubrum
• D. Aspergillus fumigatus

Answer: (A)

Spaghetti-and-meatballs on a skin scraping is the classic microscopic clue for a superficial yeast that lives in the outer skin layer and causes pityriasis versicolor. When skin scales are treated with a quick prep, you see short hyphae (the spaghetti) together with round budding yeast cells (the meatballs). That mixed pattern is typical of Malassezia species, especially Malassezia furfur. This organism is a lipophilic yeast that colonizes the stratum corneum and disrupts pigment in the skin, leading to the characteristic hypo- or hyperpigmented patches. The other organisms listed don’t produce that distinctive hyphae-plus-yeast cluster on skin scrapings: Candida albicans shows yeast with pseudohyphae, but not the spaghetti-and-meatballs arrangement; Trichophyton rubrum and other dermatophytes display long, branching hyphae and often macroconidia rather than the yeast-hyphae mix seen with Malassezia; Aspergillus fumigatus presents septate hyphae with acute-angle branching and conidial structures, not the yeast-hyphae pairing described.

Spaghetti-and-meatballs on a skin scraping is the classic microscopic clue for a superficial yeast that lives in the outer skin layer and causes pityriasis versicolor. When skin scales are treated with a quick prep, you see short hyphae (the spaghetti) together with round budding yeast cells (the meatballs). That mixed pattern is typical of Malassezia species, especially Malassezia furfur.

This organism is a lipophilic yeast that colonizes the stratum corneum and disrupts pigment in the skin, leading to the characteristic hypo- or hyperpigmented patches. The other organisms listed don’t produce that distinctive hyphae-plus-yeast cluster on skin scrapings: Candida albicans shows yeast with pseudohyphae, but not the spaghetti-and-meatballs arrangement; Trichophyton rubrum and other dermatophytes display long, branching hyphae and often macroconidia rather than the yeast-hyphae mix seen with Malassezia; Aspergillus fumigatus presents septate hyphae with acute-angle branching and conidial structures, not the yeast-hyphae pairing described.