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Indoor and Built Environment
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Occurrence of Airborne Bacteria and Fungi in Bayside Offices in Rio de Janeiro, Brazil

Leila S.R. Brickus

Institute de Quimica, Universidade Federal do Rio de Janeiro

Luiz F.G. Siqueira

Controlbio, São Paulo, Faculdade de Saúde Publica, Universidade de São Paulo, S.P., Brazil

Francisco R. de Aquino Neto

Institute de Quimica, Universidade Federal do Rio de Janeiro

Jari N. Cardoso

Institute de Quimica, Universidade Federal do Rio de Janeiro

This paper provides the first published information on indoor concentrations of micro-organisms in a building in Rio de Janeiro, Brazil. The building in question was a 1,000 m2, twenty-nine-story building with a central air condi tioning system. Concentrations and genera of bacteria and fungi were deter mined in several offices using a 6-stage impactor (Andersen sampler) during the summer season. Several gram-positive (Micrococcus, Bacillus, Staphylo coccus, Streptococcus) and gram-negative (Pseudomonas, Serratia, Klebsiella) genus of bacteria were detected. Of the 13 fungi identified indoors, Cladospo rium, Penicillium, Trichoderma and Aspergillus were predominant. Total bac teria and fungi counts showed a definite pattern in a comparison of results for the indoor and outdoor air. Therefore, the source of these micro-organisms is probably the outdoor air, from where they were transported indoors.

Key Words: Bacteria • Fungi • Office environment • Brazil

Indoor and Built Environment, Vol. 7, No. 5-6, 270-275 (1998)
DOI: 10.1177/1420326X9800700504
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