Wound treatment / by Louis A. Merillat, E. Wallis Hoare, and others.

  • Louis A. Merillat
Date:
1915
Catalogue details

Licence: Public Domain Mark

Credit: Wound treatment / by Louis A. Merillat, E. Wallis Hoare, and others. Source: Wellcome Collection.

    22/198 (page 18)
    Hygienic Laboratory Phenol Coefficient A method of standardizing or testing antiseptics has been developed and described by Anderson and McClin-. tic in Bulletin 82 of the Public Health and Marine Hospital Service, Washington, D.C.,. known as the ‘‘Hygienic Laboratory Phenol Coefficient’’ method, which takes into account all of the above-mentioned fac- tors. It is sufficient for our purpose at this time merely to state how this method meets these requirements with- out going into the details of laboratory manipulations. 1. Type of organism used is a twenty-four-hour broth culture of B. typhosus (the organisin - es feyer ina man) . Temperature is 20 degrees Centigrade . Concentrations of various strength . Length of time varies from two and one-half to fifteen minutes for each dilution or concentration . Organic matter consisting of two per cent of peptone and one per cent of gelatin is used. , Or He CO DOD To give more information regarding any given dlis- infectant, this method prescribes: that ‘its germicidal properties be determined upon typhoid’ both in the ab- sence and in presence of organic matter. For purposes of comparison the results. are expressed in figures known as the ‘‘hygienie laboratory phenol eo- efficient,’? which simply means the germicidal proeper- ties of the disinfectant. in question expressed in terms of phenol or earbolic acid, reducing the value of all dis- infectants to a.common language or:medium' of: ex- change, so to speak, just as the value of wheat, beef, and gasoline is expressed in terms of dollars and cents rather than expressing the value-of. a bushel of wheat:in pounds of beef, or pounds of beef in gallons of gasoline: ~The phenol coefficient, then, gives you:the bactericidal’ prop: erty of the disinfectant in question compared’ to phenol.