Mackintosh C A, Lidwell O M, Towers A G, Marples R R
J Hyg (Lond). 1978 Dec;81(3):471-9. doi: 10.1017/s0022172400025341.
There was a 1000-fold difference between the highest and the lowest mean rate of dispersal of bacteria-carrying particles during exercise among a group of three male and three female subjects. Differences in the numbers of skin fragments dispersed and in the proportion of these carrying bacteria were almost equally responsible for this. Since there is little difference between individuals in the rate of skin replacement the differences in the rates of dispersal of skin fragments during exercise must reflect large variations in the amount of skin surface removed in other ways. The skin fragments dispersed had a wide size range extending below 5 micrometer for the minimum projected diameter (MPD). The median MPD was about 20 micrometer with 7-10% less than 10 micrometer. Many of the particles could therefore pass freely through tightly woven fabrics with pores up to 10-15 micrometer which might seem to be impenetrable to whole corneocytes, typically larger than 30 X 40 micrometer in the hydrated state.
在一组三名男性和三名女性受试者进行运动期间，携带细菌颗粒的最高和最低平均扩散速率之间存在1000倍的差异。皮肤碎片扩散数量的差异以及其中携带细菌的比例差异对此差异的影响几乎相同。由于个体之间皮肤更新速率差异不大，因此运动期间皮肤碎片扩散速率的差异必定反映出通过其他方式去除的皮肤表面积存在很大差异。扩散的皮肤碎片大小范围很广，最小投影直径（MPD）小于5微米。MPD的中位数约为20微米，7 - 10% 小于10微米。因此，许多颗粒可以自由穿过孔径达10 - 15微米的紧密编织织物，而这些织物对于通常在水合状态下大于30×40微米的完整角质形成细胞似乎是无法穿透的。
