Ecological relationships between xerophilic fungi and house-dust mites (Acarida: Pyroglyphidae) |
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Authors: | B v d Lustgraaf |
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Institution: | (1) Laboratory of Minibiology, Institute of Dermatology, State University, Utrecht;(2) Department of Botany, Catholic University, Nijmegen, The Netherlands;(3) Present address: Laboratory of Minibiology, Institute of Dermatology, State University, Catharijnesingel 101, Utrecht, The Netherlands |
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Abstract: | Summary At. 75 and 80% relative humidity (RH), on a wheat germ flake medium, Aspergillus penicilloides grew abundantly and suppressed the population growth of Dermatophagoides pteronyssiunus. At 71% RH, A. penicilloides grew moderately and was only antagonistic to D. pteronyssinus when the fungus was previously incubated on the medium.On a human dander medium and on mattress dust, A. penicilloides grew moderately at 71% and 75% RH and stimulated the development of D. pteronyssinus populations. Also a moderate growth of Eurotium repens on human dander positively influenced D. pteronyssinus. Wallemia sebi and Penicillium brevicompactum grew slightly or did not grow at all at 75% RH. No effect was observed on D. pteronyssinus.It appears that xerophilic fungi may stimulate, and occasionally may reduce, the growth of house-dust mite populations in the natural environment. |
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