Conference Summary: 5th International Conference on Indoor Air Quality and Climate

Walkinshaw, Douglas S.

doi:10.1080/1047322x.1991.10387956

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Another study concluded big differences in MVOC production for different A. versicolor strains. 35 The MVOC production of A. alternata on malt extract agar (MEA) and plasterboard was dominated by 2-methylbutanol and 3-methylbutanol. When grown on wallpaper, particularly 2-ethylhexanol and methyl 2-ethylhexanoate were detected together with smaller amounts of 1-octen-3-ol.…”

Section: Resultsmentioning

confidence: 99%

Use of headspace SPME-GC-MS for the analysis of the volatiles produced by indoor molds grown on different substrates

et al. 2008

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An automated headspace solid phase microextraction method followed by GC-MS analysis was used to evaluate and compare the in vitro production of microbial volatile organic compounds (MVOCs) on malt extract agar, plasterboard and wallpaper. Five fungal strains were isolated from the walls of water-damaged houses and identified. In addition, four other common molds were studied. In general, MVOC production was the highest on malt extract agar. On this synthetic medium, molds typically produced 2-methylpropanol, 2-methylbutanol and 3-methylbutanol. On wallpaper, mainly 2-ethylhexanol, methyl 2-ethylhexanoate and compounds of the C8-complex such as 1-octene-3-ol, 3-octanone, 3-octanol and 1,3-octadiene were detected. The detection of 2-ethylhexanol and methyl 2-ethylhexanoate indicates an enhanced degradation of the substrate by most fungi. For growth on plasterboard, no typical metabolites were detected. Despite these metabolite differences on malt extract agar, wallpaper and plasterboard, some molds also produced specific compounds independently of the used substrate, such as trichodiene from Fusarium sporotrichioides and aristolochene from Penicillium roqueforti. Therefore, these metabolites can be used as markers for the identification and maybe also mycotoxin production of these molds. All five investigated Penicillium spp. in this study were able to produce two specific diterpenes, which were not produced by the other species studied. These two compounds, which remain unidentified until now, therefore seem specific for Penicillium spp. and are potentially interesting for the monitoring of this fungal genus. Further experiments will be performed with other Penicillium spp. to study the possibility that these two compounds are specific for this group of molds.

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Section: Resultsmentioning

confidence: 99%

Use of headspace SPME-GC-MS for the analysis of the volatiles produced by indoor molds grown on different substrates

et al. 2008

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“…There were many open areas in the building, and the air could thus be spread throughout by the well-dimensioned ventilation. However, a high ventilation rate may not always solve the problem with sick building syndrome [22], which is why the acute transient decrease in pulmonary function on the 2 winter occasions therefore is suggested to depend on the ventilation system being in an operating mode. This is further supported by the findings that the studied group had less complaints and no pulmonary function impediment during a working week when the ventilation system was shut off on the study occasion 2 months after measurement 1.…”

Section: Discussionmentioning

confidence: 99%

Acute Pulmonary Function Impairment in School Staff Working in a 'Sick Building': A Pilot Study

Dahlqvist¹,

Alexandersson²

1993

Indoor Environment

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Energy-efficiency procedures in the form of the insulating of buildings and reducing ventilation synchronized with an increase in complaints from occupants about discomfort and health effects. In the present paper, respiratory symptoms and pulmonary function in 17 subjects in a Swedish school with mechanical ventilation have been determined before and after a working week once each in winter and summer and once again in winter 1 year later. The total concentration of viable airborne mold fungi varied in the range of 332-453 colony-forming units/m3 (normal limit 174). The predominating mold species were Penicillium (49%), followed by Cladosporium (28%) and Aspergillus (13%); the dominating symptoms were irritated mucous membranes (eyes, nose and throat), headache and/or sleepiness. Thirteen out of 15 subjects exhibited a fall in forced vital capacity during a working week when examined in wintertime. This decrease was found among nonsmokers as well as smokers. Pulmonary function was unaltered during a working week in summertime. A principal component analysis of the variables job category, gender, smoking habits, and symptoms of breathlessness, coughing, mucous membranes, headache and/or sleepiness identified three factors accounting for 77% of the total variability. Symptoms from lower airways were related to the pulmonary function impairment. The acute transient pulmonary function deterioration suggests the existence of deleterious effects in a moist environment with growth of microorganisms or other unmeasured exposures quantitatively related to the microorganisms. These effects seem to be associated with whether or not the ventilation system was switched on.

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“…There were many open areas in the building, and the air could thus be spread throughout by the well-dimensioned ventilation. How ever, a high ventilation rate may not always solve the problem with sick building syndrome [22], which is why the acute transient decrease in pulmonary function on the 2 winter occasions therefore is suggested to depend on the ventilation system being in an operating mode. This is further supported by the findings that the studied group had less complaints and no pulmonary function impedi ment during a working week when the ventilation system was shut off on the study occasion 2 months after mea surement 1.…”

Section: Medical Examinationmentioning

confidence: 99%

Acute Pulmonary Function Impairment in School Staff Working in a 'Sick Building': A Pilot Study

Dahlqyist¹,

Alexandersson²

1993

Indoor Built Environ

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Energy-efficiency procedures in the form of the insulating of buildings and reducing ventilation synchronized with an increase in complaints from occupants about discomfort and health effects. In the present paper, respiratory symptoms and pulmonary function in 17 subjects in a Swedish school with mechanical ventilation have been determined before and after a working week once each in winter and summer and once again in winter 1 year later. The total concentration of viable airborne mold fungi varied in the range of 332- 453 colony-forming units/m^3 (normal limit 174). The predominating mold species were Pénicillium (49%), followed by Cladosporium (28%) and Aspergillus (13%); the dominating symptoms were irritated mucous membranes (eyes, nose and throat), headache and/or sleepiness. Thirteen out of 15 subjects exhibited a fall in forced vital capacity during a working week when examined in wintertime. This decrease was found among nonsmokers as well as smokers. Pulmonary function was unaltered during a working week in summertime. A principal component analysis of the variables job category, gender, smoking habits, and symptoms of breathlessness, coughing, mucous membranes, headache and/or sleepiness identified three factors accounting for 77% of the total variability. Symptoms from lower airways were related to the pulmonary function impairment. The acute transient pulmonary function deterioration suggests the existence of deleterious effects in a moist environment with growth of microorganisms or other unmeasured exposures quantitatively related to the microorganisms. These effects seem to be associated with whether or not the ventilation system was switched on.

show abstract

Conference Summary: 5th International Conference on Indoor Air Quality and Climate

Cited by 3 publications

References 5 publications

Use of headspace SPME-GC-MS for the analysis of the volatiles produced by indoor molds grown on different substrates

Use of headspace SPME-GC-MS for the analysis of the volatiles produced by indoor molds grown on different substrates

Acute Pulmonary Function Impairment in School Staff Working in a 'Sick Building': A Pilot Study

Acute Pulmonary Function Impairment in School Staff Working in a 'Sick Building': A Pilot Study

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