Joanna Peltola

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Nocardiopsis strains were isolated from water-damaged indoor environments. Two strains (N. alba subsp. alba 704a and a strain representing a novel species, ES10.1) as well as strains of N. prasina, N. lucentensis, and N. tropica produced methanol-soluble toxins that paralyzed the motility of boar spermatozoa at <30 microg of crude extract (dry weight) x(More)
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 microg (dry weight) ml(-1) were found from six bacterial isolates and one fungus. The substances from isolates of(More)
Actinomycete isolates from indoor air and dust in water-damaged schools and children's day care centers were tested for toxicity by using boar spermatozoa as an indicator. Toxicity was detected in extracts of four strains which caused a loss of sperm motility, and the 50% effective concentrations (EC50) were 10 to 63 ng (dry weight) ml of extended boar(More)
Thirty-one isolates of Stachybotrys chartarum from indoor and outdoor environments were analyzed for the presence of the trichodiene synthase (Tri5) gene, trichothecenes, boar sperm cell motility inhibition, and randomly amplified polymorphic DNA banding patterns (RAPDs). Twenty-two S. chartarum isolates tested positive for the Tri5 gene and nine were(More)
The presence, quantity and origins of potentially toxic airborne substances were searched in moisture damaged indoor environments, where building related ill health symptoms were suspected and reference sites with no health complaints. Boar spermatozoa were used as the toxicity sensor. Indoor aerosols and dusts were collected from kindergartens, schools,(More)
Industrial wood-based construction materials: chipboard, plain and overlaid plywood, phenolic surface film, laminates and selected synthetic polymers were studied for their biodegradability under aerobic and anaerobic conditions and for the environmental quality of the degradation residue. The yields of carbon dioxide plus methane from the wood-based(More)
OBJECTIVE The purpose of the present study was to examine and follow up the presence of respiratory viral and bacterial pathogens in the nasopharynx of otitis-prone children during the cold season and compare the findings with the child's respiratory symptoms. METHODS We enrolled 121 otitis-prone children, aged 10 months to 4 years for a prospective(More)
Many clinical laboratories are familiar with a sizeable group of "unserotypeable Yersinia enterocolitica" strains. Due to identification problems, this group may hide Y. bercovieri, Y. mollaretii, and Y. rohdei strains. We present a simple scheme to distinguish between pathogenic Y. enterocolitica and potentially nonpathogenic Y. enterocolitica-like strains.
Trichoderma species isolated from water-damaged buildings were screened for toxicity by using boar sperm cells as indicator cells. The crude methanolic cell extract from Trichoderma harzianum strain ES39 inhibited the boar sperm cell motility at a low exposure concentration (50% effective concentration, 1 to 5 microg [dry weight] ml of extended boar(More)
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