Kasmera (Jun 2009)
Detection of the Legionella Species in Water used in Dental Units. Maracaibo, Venezuela
Abstract
The presence of any microorganism in the water used in dental units constitutes a serious danger for both the patient and the personnel that work there. The present investigation had two aims: 1) To implement and compare two microbiological water analysis techniques for studying the Legionella species; and 2) To detect the presence of Legionella in the water used for hand-held equipment in dental clinics used by dentistry students at the University of Zulia. Two comparative techniques were standardized: CDC and ISO-11731, using samples prepared with the Legionella pneumophila strain ATCC 33155 and a bacteriological study of 40 water samples from four (4) dentistry teaching clinics located in the Faculty of Dentistry at LUZ, using the two aforementioned methodologies. Results showed that both techniques were sensitive to isolating Legionella in water samples, but the acid treatment was more effective than warming. Despite the use of both techniques, the presence of Legionella was not detected in any of the water samples analyzed. This study served as a basis for implementing quality control related to isolating Legionella in the waters used on a hospital level.
