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Disinfection of woollen blanket

Published online by Cambridge University Press:  15 May 2009

W. G Crewther  and
A. B McQuade
W. G Crewther
Affiliation:
Division of Protein Chemistry, C.S.I.R.O., Wool Research Laboratories, Parkville, N. 2 (Melbourne), Victoria, Australia
A. B McQuade
Affiliation:
Division of Protein Chemistry, C.S.I.R.O., Wool Research Laboratories, Parkville, N. 2 (Melbourne), Victoria, Australia
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The efficiencies of bactericides in destroying bacteria on woollen blanket were investigated on a laboratory scale. The bactericides were not effective when tested with new blanket; this low efficiency was found to be related to the rapid adsorption of the bactericides by the wool. Pretreatment of the wool with concentrated solutions of bactericides depressed the rate of depletion of the bactericides from subsequent washing liquors with bactericides at customary concentrations, and led to more satisfactory rates of kill (inactivation factors about 106).

The test organisms, Staphylococcus aureus and Escherichia coli, were applied to the blanket as a powder, and the relative densities of bacteria on the blanket were determined using a procedure based on maceration of the fabric. The bactericides, 4-chloro-3, 5-xylenol (P.C.M.X.), cetyl trimethyl ammonium bromide (C.T.A.B.) and bis-(4-chlorophenyl diguanido)-hexane diacetate (chlorhexidine diacetate) were tested in the presence of appropriate detergents.

Cultures were kindly supplied by Dr Hildred Butler of the Royal Women's Hospital, Melbourne.

Type
Research Article
Information
Journal of Hygiene , Volume 62 , Issue 1 , March 1964 , pp. 29 - 37
Copyright
Copyright © Cambridge University Press 1964

References

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