Occupational exposure to fungal and actinomycete spores during the handling of wood chips

Kotimaa, Marjut

doi:10.1080/00173139009427746

Cited by 14 publications

(4 citation statements)

References 6 publications

(5 reference statements)

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“…During handling of wood chips concentrations up to 27,000 cfu Streptomyces spp. have been measured and it was found in 10 of 20 air samples (61). As mentioned for other species, the lack of species identification makes conclusions about exposure to a certain species difficult.…”

Section: Streptomycesmentioning

confidence: 95%

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Occupational exposure to microorganisms used as biocontrol agents in plant production

Madsen¹

2011

Front Biosci

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Exposure to bioaerosols containing fungi and bacteria may cause various deleterious respiratory health effects. Fungi and bacteria are commercially produced and applied to the environment as microbiological pest control agents (MPCAs). Attention has been drawn towards the exposure and health risks due to the use of commercially important MPCAs. As part of a risk evaluation this paper intends to review whether the exposure to MPCAs (Beauveria bassiana, Verticillium lecanii, Trichoderma harzianum, T. viride, T. polysporum, Paecilomyces fumosoroseus, P. lilacinus, Streptomyces griseoviridis, Bacillus subtilis and Ba. thuringiensis) exceeds background exposure levels. The paper is further aimed to focus on the aerosolization of MPCAs in relation to exposure and human inhalation. From the few studies about exposures it is concluded that both people handling MPCAs in occupational settings and residents of an area where MPCAs have been applied may be exposed to MPCAs. The highest exposures to MPCAs are found for people applying MPCAs. In 2 of 12 environments exposure to applied MPCAs were higher than exposure to the total number of bacteria or fungi.

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Section: Streptomycesmentioning

confidence: 95%

“…Airborne Streptomyces species have been found in many studies in different environments (53,(59)(60)(61)(62)(63)(64)(65)(66) but none of them have been identified as S. griseoviridis. Streptomyces species have been found in 9 % of airborne dust samples from 181 classrooms (67).…”

Section: Streptomycesmentioning

confidence: 99%

Occupational exposure to microorganisms used as biocontrol agents in plant production

Madsen¹

2011

Front Biosci

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“…The total numbers of mesophilic bacteria were counted from tryptone-glucose-yeast-extract agar after 5 d of incubation at 20°C. The medium and incubation temperature for the other microbe groups (ie, xerophilic fungi, mesophilic fungi, thermotolerant fungi, and thermophilic actinomycetes) have been given in another report (15). A total of 1105 air samples was collected for the microbiological analysis.…”

Section: Methodsmentioning

confidence: 99%

Feeding and bedding materials as sources of microbial exposure on dairy farms.

Kotimaa¹,

Oksanen²,

Koskela³

1991

Scand J Work Environ Health

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KOTIMAA MH, OKSANEN L, KOSKELA P . Feeding and bedding materials as sources of microbial exposure on dairy farms. ScandJ WorkEnvironHealth 1991:17:117-22. Hay, grain, silage, and bedding are the sources of mold dust in agriculture. The aim of the present study was to evaluate the effect of different farming methods on exposure to airborne microbes. The study material comprised 50 silage, 54 hay, 47 grain , and 70 beddin g samples taken on 18 farm s in the beginning , middle, and end of the indoor feeding season. The modified wind-tunnel technique and six-stage impactors were used to determine the number of mesophilic bacteria, xerophilic fungi, mesophilic fungi, thermotolerant fungi, and thermophilic actinomycetesliberated from each material. Baled hay and straw liberated the largest amounts of microbes. Hay, except when dried in storage, liberated great numbers of fungal spores. The proportion of respirable airborne microbe-bearing particles was greatest in the highest concentrations . Theoretically, choosing the best possible alternative work methods could diminish exposure to microbes to onetenth of the present level.

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“…They can be found in different residential environments such as homes, day cares, and schools (Gorny et al, 1999;Meklin et al, 2002;Reponen et al, 1994), as well as various occupational settings including food processing, agriculture, health care, and biotechnology (Hunter, 1992;Kotimaa, 1990;Olenchock, 1988;Verreault et al, 2011). Exposure to bioaerosols in these environments may pose health risks to the general and occupational population.…”

Section: Introductionmentioning

confidence: 97%

A wind tunnel test of newly developed personal bioaerosol samplers

Tolchinsky²,

Sigaev³

et al. 2012

Journal of the Air & Waste Management Association

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In this study the performance of two newly developed personal bioaerosol samplers was evaluated. The two test samplers are cyclone-based personal samplers that incorporate a recirculating liquid film. The performance evaluations focused on the physical efficiencies that a personal bioaerosol sampler could provide, including aspiration, collection, and capture efficiencies. The evaluation tests were carried out in a wind tunnel, and the test personal samplers were mounted on the chest of a full-size manikin placed in the test chamber of the wind tunnel. Monodisperse fluorescent aerosols ranging from 0.5 to 20 microm were used to challenge the samplers. Two wind speeds of 0.5 and 2.0 m/sec were employed as the test wind speeds in this study. The test results indicated that the aspiration efficiency of the two test samplers closely agreed with the ACGIH inhalable convention within the size range of the test aerosols. The aspiration efficiency was found to be independent of the sampling orientation. The collection efficiency acquired from these two samplers showed that the 50% cutoff diameters were both around 0.6 microm. However the wall loss of these two test samplers increased as the aerosol size increased, and the wall loss of PAS-4 was considerably higher than that of PAS-5, especially in the aerosol size larger than 5 microm, which resulted in PAS-4 having a relatively lower capture efficiency than PAS-5. Overall, the PAS-5 is considered a better personal bioaerosol sampler than the PAS-4.

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Occupational exposure to fungal and actinomycete spores during the handling of wood chips

Cited by 14 publications

References 6 publications

Occupational exposure to microorganisms used as biocontrol agents in plant production

Occupational exposure to microorganisms used as biocontrol agents in plant production

Feeding and bedding materials as sources of microbial exposure on dairy farms.

A wind tunnel test of newly developed personal bioaerosol samplers

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