Particle counting and microbiological air sampling: results of the simultaneous use of both procedures in different types of hospital rooms.

Abstract:

INTRODUCTION:In order to assess the relationship between the concentrations of airborne fungi and particles, particle counting was combined with fungal air sampling in several rooms of a hospital. METHODS:Concentrations of ≥0.5μm particles (P05) and ≥1μm particles (P1) were measured using a particle counter; fungal air sampling was performed with volumetric air samplers, which impacted air on Rodac plates with Sabouraud chloramphenicol agar. Particle counts were categorised according to ISO 14644-1 standard cut-off points; their association with fungal detection was assessed with Fisher's exact test. RESULTS:Forty-two simultaneous samplings were carried out: 24 in operating rooms, 13 in rooms for burns or haematology patients, 3 in pharmacy clean rooms, and two in other procedure rooms. Filamentous fungi were recovered in 5 samples, which also had higher particle counts. No fungi were detected in 12 samplings with both P05 and P1 concentrations below the maximum for class 6 clean rooms; 4 of 7 samplings with both concentrations within the range for class 8 clean rooms were positive for fungi. The association between fungal detection and higher particle counts was statistically significant, both for P05 (p=.004) and P1 (p=.003). There was a partial overlap between the concentrations of particles of samplings which were positive or negative for fungi. CONCLUSIONS:There is a relationship between the concentrations of P05 and P1 and airborne fungi in hospital rooms. When both P05 and P1 concentrations are below the maximum for class 6 clean rooms, a negative fungal detection can be predicted.

authors

Armadans-Gil L,Rodríguez-Garrido V,Campins-Martí M,Gil-Cuesta J,Vaqué-Rafart J

doi

10.1016/j.eimc.2012.01.005

subject

Has Abstract

pub_date

2013-04-01 00:00:00

pages

217-21

issue

4

eissn

0213-005X

issn

1578-1852

pii

S0213-005X(12)00036-5

journal_volume

31

pub_type

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