[Isolation of Legionella pneumophila from 24 hr-home bath water and an eradication trial of the bacteria from the bath].
Contamination of 24 hr home bath with Legionella pneumophila is recently well recognized. Eradication of the water-bath contamination from L. pneumophila and other bacteria is an important matter to prevent the infection because the 24 hr-bathing facility is widely accepted in Japanese houses. Among the 16 bathing water samples we tested, Legionella pneumophia was isolated from 6 cases (37.5%) when the bathing water was not treated with disinfectants. Number of L. pneumophila increased up to 10(3) cfu/ml and total culturable bacterial counts reached to 10(5) cfu/ml within 5 days when the water was not treated. We selected 5 water baths among 6 positive cases to study the bactericidal effect of chlorine. As a result we concluded that the growth of L. pneumophila in 24 hr-water bath could be stopped by the 2 ppm chlorination program every day.
Li
N
N
Gifu Research Institute of Environmental Microbes.
Aoyama
T
T
Hori
H
H
Ezaki
T
T
D001494:Baths; D015169:Colony Count, Microbial; D004203:Disinfection; D016952:Legionella pneumophila / Q000302:isolation & purification*; D012973:Sodium Hypochlorite; D014871:Water Microbiology
D012973:Sodium Hypochlorite