African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5211

Full Length Research Paper

Assessment of microbiological indoor air quality in public buildings: A case study (Timisoara, Romania)

Daliborca Cristina Vlad1 , Roxana Popescu2*, Marioara Nicoleta Filimon3,4, Camelia Gurban1, Ancuta Tutelca5, Dragos V Nica6 and Victor Dumitrascu1
1University of Medicine and Pharmacy “Victor Babes”, Department of Pharmacology and Biochemistry, 300041, E. Murgu, 2, Timisoara, Romania. 2University of Medicine and Pharmacy “Victor Babes”, Department of Cellular and Molecular Biology, 300041, E. Murgu, 2, Timisoara, Romania. 3West University of Timisoara, Faculty Chemistry-Biology-Geography, Department Biology-Chemistry, Pestalozzi 16, RO 300315 Timisoara, Romania. 4West University of Timisoara, Multidisciplinary Research Platform “Nicholas Georgescu – Roengen” Advanced Environmental Research Laboratories, Oituz 4, Timisoara 300086, Romania. 5County Clinical Emergency Hospital – Microbiology Department, Bd. Iosif Bulbuca 10, RO 300736 Timisoara, Romania. 6Banat's University of Agricultural Sciences and Veterinary Medicine from Timisoara, Faculty of Animal Sciences and Biotechnologies, Timisoara, Calea Aradului 119, RO 300645, Romania.
Email: [email protected]

  •  Accepted: 26 April 2013
  •  Published: 07 May 2013


The indoor air quality in public buildings is essential for the health of employees and visitors. To investigate the potential influence of airborne germ loads on human health, two sampling campaigns were conducted during 2009 in several public buildings in Timisoara (Romania). The quality of air revealed highly significant differences among different sites. Cluster analysis accurately classified the investigated buildings into three main groups and for most groups of aerial microorganisms, the measured values rarely fell below the normal concentrations in indoor environments. Although the structure of airborne flora varied widely among different locations, mesophilic bacteria and molds were the main determinants of indoor air quality in investigated buildings. It was found that these two factors explained over 90% of the overall average dissimilarity in the structure of indoor airborne microbiota. Moreover, multivariate analysis showed a strong positive relationship between these two factors, which is probably related to the number of daily occupants and visitors as well as to the building age. Further research is required to determine more accurately the relationship between ventilation performance and air quality.


Key words: Indoor air quality, airborne germ load, public buildings, mesophilic bacteria, airborne molds.