Blenkharn J I
Department of Bacteriology, Royal Postgraduate Medical School, Hammersmith Hospital, London.
J Hosp Infect. 1989 Jan;13(1):27-31. doi: 10.1016/0195-6701(89)90092-3.
Using formula milk seeded with Staphylococcus epidermidis as indicator, bacteria were observed to pass beyond the collecting bottles of three electrically operated breast pumps. Bacteria were recovered from sites distal to the level of visible contamination, the incidence increasing with repeated use of the apparatus. Despite use of a sterile collecting bottle, retrograde contamination of freshly collected milk may occur from previously contaminated components of the pumps. The results suggest that a terminal in-line air filter is essential to ensure aerosols containing potentially pathogenic bacteria do not contaminate the suction source or be emitted to the environment with the exhaust air. Where a single pump is used by more than one person adequate sterilization of all removable components is essential.
以接种表皮葡萄球菌的配方奶作为指示物，观察到细菌能够通过三款电动吸奶器的收集瓶。在可见污染水平以下的部位也能检测到细菌，且随着该器械的反复使用，细菌检出率有所增加。尽管使用了无菌收集瓶，但新收集的乳汁仍可能因吸奶器先前已被污染的部件而发生逆行污染。结果表明，在线终端空气过滤器对于确保含有潜在致病细菌的气溶胶不会污染抽吸源或随废气排放到环境中至关重要。若多人使用同一台吸奶器，则对所有可拆卸部件进行充分消毒必不可少。
