Abstract
Human dander fed on by Dermatophagoides pteronyssinus (Trouessart) is deficient in vitamins. Therefore, additional B and D vitamins were tested in the laboratory on mattress dust and on house-floor dust because Aspergillus has been shown to provide extensive biosynthesis of these components. Effects of additional vitamins were minimal on mattress dust. Apparently, an adequate fungal metabolism is present, based on growth of the endemic fungi on that substrate. Yet the added vitamins greatly enhanced reproduction and growth of D. pteronyssinus in floor dust. Differential effects of additional vitamins, depending on the substrate, confirmed the importance of fungal intervention in the diet of the mite. Mattress dust seems to be the true biotope of D. pteronyssinus.
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