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Microbiological Identification of Atmospheric Particles in Hermosillo, Sonora, México

Journal of Environmental Protection 2014年第5期5卷 376-386页

作者： Santos-Romo Alvaro Sau-Acosta Nancy Janeth Certucha-Barragán María Teresa Almendáriz-Tapia Francisco Javier Monge-Amaya Onofre Hernández-López Jorge Zepeda-Ibarra Joel Department of Chemical Engineering & Metallurgy within the Engineering Division of the University of Sonora Hermosillo Mexico nortwest biologicalinvestigation centre Hermosillo Mexico Urban Development and Ecology General Coordination of Infrastructure Municipal Institute of Ecology Hermosillo Mexico

The air quality in many cities has been deteriorating and affecting population’s health. Airborne particles can block the defense mechanisms of respiratory system and may lead biological elements such as pollen, bacteria, fungi and viruses into the lungs. This paper presents the study of biologically contaminated air in the city of Hermosillo, analyzing filters containing particulate matter with a diameter equal or less than 10 micrometers (PM10) and Total Suspended Particles (TSP). Three sampling periods were analyzed during 2011. Samples taken from the filters were placed in tubes containing nutritive broth BHI (Brain Heart Infusion) and incubated at 37 °C for 24 hours. The identification of the isolated microorganisms was done by a biochemical test recommended in Bergey’s Manual. Results showed a high bacteria concentration in the presence of microorganisms such as Klebsiella pneumoniae sub pneumoniae, Citrobacter, Enterococcus faecalis, Proteus penneri, Butiauxellaagrestis, Salmonella paratyphi A and Enterobacter sacazakii. When bacterial concentration was analyzed separately, the lowest number of bacteria was observed during February for the south location and in August for the north location. The highest degree of bacterial air pollution was found in the central area of the city.

关键词： Air Pollution Airborne Particles Bacteria

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