isolation of legionella pneumophila from hospital cooling towers in johor, malaysia. | water-based cooling towers and their water supply at two hospitals in johor were surveyed for the presence legionella pneumophila. l. pneumophila were grown from 19 (76%) out of 25 collected water samples. one hospital cooling tower was contaminated with l. pneumophila serogroup 1. | 2004 | 15727373 |