Isolation and characterization of Legionella spp. and Pseudomonas spp. from greenhouse misting systems
| Autor: | H. Dunkelberg, M. Narbe, B.P. Zietz, J. Ebert |
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| Rok vydání: | 2006 |
| Předmět: |
DNA
Bacterial Veterinary medicine Legionella Colony Count Microbial Greenhouse Applied Microbiology and Biotechnology Microbiology 03 medical and health sciences Germany Pseudomonas Potential source Colonization 030304 developmental biology 0303 health sciences biology 030306 microbiology Agriculture Bacteriology General Medicine Contamination biology.organism_classification Isolation (microbiology) Monitoring and control 6. Clean water Random Amplified Polymorphic DNA Technique 13. Climate action Water Microbiology Ecological Systems Closed Biotechnology |
| Zdroj: | Journal of Applied Microbiology. 100:1239-1250 |
| ISSN: | 1365-2672 1364-5072 |
| Popis: | Aims: Greenhouse misting systems used for watering plants produce fine aerosols. They are a possible cause for bacterial infections. This study investigates the colonization of greenhouse misting systems with Legionella spp. and Pseudomonas spp. and evaluates a possible health hazard. Methods and Results: Between June and September 2003, a total of 80 water samples were collected in 20 different greenhouse systems in Germany, each tested on two different occasions. Each time, water was drawn at a central tap and at the outlet of spray nozzles. Sampled greenhouses were used to cultivate various plants and trees for commercial, recreational or scientific reasons, some of them in tropical conditions. Legionella spp. were detected in 10% of the systems (two systems), but only in low numbers. On the contrary, Pseudomonas spp. were recovered from 70% of the greenhouse watering systems (14 systems), occasionally at counts greater than 10 000 CFU per 100 ml. A random amplified polymorphic DNA polymerase chain reaction typing method was used to demonstrate that each colonized greenhouse had one or several individual strains of Legionella and Pseudomonas that could not be detected in any other system. Conclusions: This study demonstrates that aerosolizing greenhouse watering systems may be contaminated with Legionella or Pseudomonas which under certain circumstances could become a potential source of infection for workers and visitors. Significance and Impact of the Study: The study results indicate that greenhouse misting systems should be included in Legionella and Pseudomonas monitoring and control programs. |
| Databáze: | OpenAIRE |
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