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Applied and Environmental Microbiology, July 2001, p. 3269-3274, Vol. 67, No. 7
Division of Microbiology, Department of
Applied Chemistry and Microbiology, University of Helsinki, FIN-00014
University of Helsinki,1 and Clinic for
Indoor Air Health Problems, Department of Dermatology and Allergic
Diseases, Helsinki University Central Hospital, FIN-00250
Helsinki,2 Finland; Department of
Biological Sciences, Louisiana State University, Baton Rouge,
Louisiana 708033; Deutsche Sammlung von
Mikroorganismen und Zellkulturen, D-38124 Braunschweig,
Germany4; and Centraalbureau voor
Schimmelcultures, 3740 AG Baarn, The Netherlands5
Received 28 November 2000/Accepted 15 April 2001
Toxic-metabolite-emitting microbes were isolated from the indoor
environment of a building where the occupant was suffering serious
building-related ill-health symptoms. Toxic substances soluble in
methanol and inhibitory to spermatozoa at <10 µg (dry weight)
ml
0099-2240/01/$04.00+0 DOI: 10.1128/AEM.67.7.3269-3274.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Toxic-Metabolite-Producing Bacteria and Fungus in
an Indoor Environment
1 were found from six bacterial isolates and one
fungus. The substances from isolates of Bacillus simplex
and from isolates belonging to the actinobacterial genera
Streptomyces and Nocardiopsis were mitochondriotoxic. These substances dissipated the mitochondrial membrane potential (
) of boar spermatozoa. The substances from the Streptomyces isolates also swelled the mitochondria.
The substances from isolates of Trichoderma harzianum Rifai
and Bacillus pumilus damaged the cell membrane barrier
function of sperm cells.
*
Corresponding author. Mailing address: Division of
Microbiology, Department of Applied Chemistry and Microbiology,
University of Helsinki, P.O. Box 56, FIN-00014 University of Helsinki,
Finland. Phone: 358-(0)9-19159305. Fax: 358-(0)9-19159322. E-mail:
joanna.peltola{at}helsinki.fi.
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