Bollin G E, Plouffe J F, Para M F, Hackman B
Appl Environ Microbiol. 1985 Nov;50(5):1128-31. doi: 10.1128/aem.50.5.1128-1131.1985.
Shower heads and hot-water faucets containing Legionella pneumophila were evaluated for aerosolization of the organism with a multistage cascade impaction air sampler. Air was collected above two shower doors and from the same rooms approximately 3 ft (91 cm) from the shower doors while the hot water was running. Low numbers (3 to 5 CFU/15 ft3 [0.43 m3] of air) of L. pneumophila were recovered above both shower doors, but none was recovered from the air in either room outside the shower door. Approximately 90% (7 of 8 CFU) of the L. pneumophila recovered were trapped in aerosol particles between 1 and 5 micron in diameter. Air was collected 1 to 3 ft (30 to 91 cm) from 14 sinks while the hot water was running. Low numbers (1 to 5 CFU/15 ft3 of air) were recovered from 6 of 19 air samples obtained. Approximately 50% (6 of 13 CFU) of the organisms recovered were trapped in aerosol particles between 1 and 8 microns in diameter. Shower heads and hot-water taps containing L. pneumophila can aerosolize low numbers of the organism during routine use. The aerosol particle size is small enough to penetrate to the lower human respiratory system. Thus, these sites may be implicated as a means of transmission of L. pneumophila from potable water to the patient.
使用多级串联冲击式空气采样器对含有嗜肺军团菌的淋浴喷头和热水龙头进行了该生物体的雾化评估。在热水流淌时，在两扇淋浴门上方以及距离淋浴门约3英尺（91厘米）的同一房间内采集空气。在两扇淋浴门上方均检测到少量（每15立方英尺[0.43立方米]空气中3至5个菌落形成单位）的嗜肺军团菌，但在淋浴门外任一房间的空气中均未检测到。回收的嗜肺军团菌中约90%（8个菌落形成单位中的7个）被困在直径为1至5微米的气溶胶颗粒中。在热水流淌时，从14个水槽1至3英尺（30至91厘米）处采集空气。在采集的19个空气样本中，有6个检测到少量（每15立方英尺空气中1至5个菌落形成单位）。回收的生物体中约50%（13个菌落形成单位中的6个）被困在直径为1至8微米的气溶胶颗粒中。含有嗜肺军团菌的淋浴喷头和热水龙头在日常使用过程中可雾化少量该生物体。气溶胶颗粒大小足以穿透至人体下呼吸道。因此，这些部位可能是嗜肺军团菌从饮用水传播至患者的一种传播途径。
