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The dimensions of skin fragments dispersed into the air during activity

  • C. A. Mackintosh (a1), O. M. Lidwell (a1), A. G. Towers (a1) and R. R. Marples (a1)

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 μm for the minimum projected diameter (MPD). The median MPD was about 20 μm with 7–10% less than 10 μm. Many of the particles could therefore pass freely through tightly woven fabrics with pores up to 10–15 μm which might seem to be impenetrable to whole corneocytes, typically larger than 30 × 40 μm in the hydrated state.

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H. Heywood (1963). The evaluation of powders. Journal of Pharmacy and Pharmacology Suppl. 15, 56T.

L. H. Jansen , M. T. Hojyo-Tomoko & A. M. Kligman (1974). Improved fluorescence staining technique for estimating turnover of the human stratum corneum. British Journal of Dermatology 90, 9.

W. C. Noble & R. R. Davies with D. A. Place (1965). Studies on the dispersal of staphylococci. Journal of Clinical Pathology 18, 16.

W. C. Noble , J. D. F. Habbema , R. Van Furth , I. Smith & C. De Raay (1976). Quantitative studies on the dispersal of skin bacteria into the air. Journal of Medical Microbiology 9, 53.

G. Plewig & R. R. Marples (1970). Regional differences of cell sizes in the human stratum corneum. Journal of Investigative Dermatology 54, 13.

M. F. Stringer & R. R. Marples (1976). Ultrasonic methods for sampling human skin micro-organisms. British Journal of Dermatology 94, 551.

P. Williamson & A. M. Kligman (1965). A new method for the quantitative investigation of cutaneous bacteria. Journal of Investigative Dermatology 45 498.

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Epidemiology & Infection
  • ISSN: 0950-2688
  • EISSN: 1469-4409
  • URL: /core/journals/epidemiology-and-infection
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