Resumen

TOLOZA-MORENO, Deisy L.; LIZARAZO-FORERO, Luz M.  y  BLANCO-VALBUENA, Jorge O.. MICROBIAL CONCENTRATION AND COMPOSITION IN THE ENVIRONMENT OF THE JORGE PALACIOS PRECIADO CENTRAL LIBRARY OF THE UNIVERSIDAD PEDAGÓGICA Y TECNOLÓGICA DE COLOMBIA, TUNJA, COLOMBIA. Actu Biol [online]. 2012, vol.34, n.97, pp.241-252. ISSN 0304-3584.

Microorganisms, spores, acari, and pollen are natural components of indoor air and they may be transported from the outdoor air by aerobiological particles that settle on dust and cause the biodeterioration of various materials, in addition to representing a risk for human health. In this study, we evaluated the microbial concentration in the environment of the ''Jorge Palacios Preciado'' Central Library of the Universidad Pedagógica y Tecnológica of Colombia. The open petri dish sedimentation method was used for the microbiological sampling of the environment, using Sabouraud agar for isolating fungi and nutrient agar for bacteria. Microbial density of this environment was found to be within sanitary levels accepted for environments of public buildings, and the greatest diversity was comprised of filamentous fungi, with 34 genera identified, along with a fungal group from the Class Phycomycetes, with Cladosporium, Penicillium, and Paecilomyces spores the most frequent in the library. Yeasts were the less representative in the environment, with two genera isolated, Candida and Rhodotorula. Regarding bacterial forms, a total 16 genera were isolated, of which Bacillus and Neisseria were the most prevalent. Taking into account the microbial genera isolated and recent research results, the environment of the Central Library may pose a health risk o people, mainly at the respiratory level, if measures are not taken to clean and to modify the ventilation system.

Palabras clave : aerobiology; library; library microorganisms; microbial concentration and composition; respiratory diseases.

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