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. 1983 Oct;91(2):277–286. doi: 10.1017/s0022172400060290

Microbial investigation of the air in an apartment building.

C Simard, M Trudel, G Paquette, P Payment
PMCID: PMC2129367  PMID: 6358346

Abstract

The microbial and viral flora in the ventilating ducts of an apartment building was evaluated. Several types of sampler (slit sampler, Andersen sampler, large volume air sampler) were used to evaluate the hourly, weekly and seasonal variation of this flora. The mean bacterial concentration was 17.2 e.f.u./m3 with a maximum level at 07.30 h (41.3 c.f.u./m3) and a minimal concentration in the early afternoon (8 c.f.u./m3). The bacterial concentration observed correlated with the relative humidity in the air-ducts although there were no seasonal differences. The bacteria were mainly gram-positive cocci (73.5%) represented by a large number of Micrococcaceae (47.1%); gram-positive bacilli accounted for 14.2% of the isolates, gram-negative bacilli 12.0% and gram-negative cocci 0.3%. The majority of the bacteria-carrying particles were in the respirable range with 80.4% of them being less than 5 microns. The methods used did not result in the isolation of viruses during the winter sampling period.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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