Mycobacterium chelonei isolation from broncho-alveolar lavage fluid and its practical implications.

Mycobacterium chelonei was isolated from the broncho-alveolar lavage fluid of seven patients on eight occasions over a 6-month period. The same bacterium was identified in the hospital water supply. Despite the use of a recommended disinfection procedure, it proved impossible to eradicate the organism until the bronchoscopes were treated with ethylene oxide and the use of tap water in rinsing was abandoned.