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Mites in facilities for laboratory animals
Sirpa M A Pennanen1, Anu T K Harju
1Kuopio Regional Institute of Occupational Health, Laboratory of Environmental Microbiology, Kuopio, Finland. sirpa.pennanen@ttl.fi
Objectives:
Two laboratory animal facilities were examined for storage and house-dust mites.
Methods:
Samples of settled dust or material were investigated microscopically, and all of the found mites were identified.
Results:
Every fourth sample contained mites. On the average, 86 mites were found in a gram of dust. Measurement with a two-way enzyme-linked immunosorbent assay revealed only one sample containing a minor amount of allergen from Dermatophagoides pteronyssinus.
Conclusions:
It seems that, in addition to house-dust mites, other mites may be important occupational contaminants in animal facilities.
Insights
Mites, including house-dust mites, are common contaminants in laboratory animal facilities. Other mite species may also pose occupational risks to personnel working in these environments.
Area of Science:
- Environmental Science
- Occupational Health
- Allergen Research
Background:
- Laboratory animal facilities can harbor various environmental contaminants.
- Mites are known allergens and can affect human health.
Purpose of the Study:
- To investigate the presence and types of mites in two laboratory animal facilities.
- To assess potential occupational exposure risks from mites in these settings.
Main Methods:
- Microscopic examination of settled dust and material samples.
- Identification of all collected mite species.
- Enzyme-linked immunosorbent assay (ELISA) for allergen detection.
Main Results:
- Mites were detected in 25% of samples.
- An average of 86 mites per gram of dust were found.
- Low levels of Dermatophagoides pteronyssinus allergen were present in only one sample.
Conclusions:
- House-dust mites are present in laboratory animal facilities.
- Non-house-dust mites may also be significant occupational contaminants.
- Further investigation into other mite species is warranted for occupational health.