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Pseudomonas aeruginosa Isolated from Marine Environments in Tokyo Bay
N. Kimata, T. Nishino, S. Suzuki and K. Kogure
Vol. 47, No. 1 (Jan., 2004), pp. 41-47
Published by: Springer
Stable URL: http://www.jstor.org/stable/25153023
Page Count: 7
You can always find the topics here!Topics: Bays, Sea water, Pseudomonas aeruginosa, Marine environments, Antibodies, Ribosomal DNA, Bacteria, Oceans, River water, Fresh water
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Pseudomonas aeruginosa is a pathogenic bacterium that has been thoroughly investigated since the 19th century and is generally regarded as a freshwater or terrestrial organism. In 1995, it was reported that the OprP porin, an outer membrane protein corresponding to that of this bacterium, was widely distributed as a dissolved component in seawater. This finding led us to investigate the presence of P. aeruginosa in marine environments. Both culture-independent and -dependent methods were applied to seawater samples obtained in Tokyo Bay during four cruises. The DVC-FA (direct viable count-fluorescent antibody) technique showed that cells reactive to an antibody against P. aeruginosa were widely present in the bay, i.e., 10³ to 10⁴ cells/mL in the inner bay, and 10² to 10³ cells/mL at the mouth. Bacterial cells isolated by selective medium were identified by three methods: the presence of oprI and oprL, two outer membrane lipoprotein genes specific to P. aeruginosa; the API20 NE kit; and 16S rDNA sequence analysis. The results confirmed that the majority of isolates from the bay were P. aeruginosa. Immuno-chemical analyses of the seawater results indicate that P. aeruginosa is commonly present in coastal marine environments and sheds OprP.
Microbial Ecology © 2004 Springer