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SOME OBSERVATIONS ON BACTERICIDAL PAINT FILMS
Author(s) -
MORRIS E. J.,
DARLOW H. M.
Publication year - 1959
Publication title -
journal of applied bacteriology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 0021-8847
DOI - 10.1111/j.1365-2672.1959.tb04611.x
Subject(s) - wax , bacillus subtilis , chemistry , microbiology and biotechnology , spore , relative humidity , staphylococcus aureus , formaldehyde , bacteria , biology , biochemistry , thermodynamics , genetics , physics
SUMMARY: A method is described for testing the self‐sterilizing activity of surfaces coated with paints containing bactericidal agents. The most active coating consisted of 10% (w/w) Cetavlon dissolved directly in urea‐formaldehyde:alkyd resin. The recovery of viable organisms from such surfaces infected with Streptococcus faecalis, Staphylococcus aureus, Aerobacter aerogenes and Chromobacterium prodigiosum was less than 10% of that from painted control surfaces after exposure for 1 hr at atmospheric relative humidity of 70% and temperature of 20°. Bacillus subtilis spores were not affected until they became heat‐sensitive. The self‐sterilizing activity was markedly diminished at 40% r.h. and the inclusion of blood in the deposited bacterial particle was then completely protective. Repeated washing in water with gentle rubbing quickly inactivated Cetavlon paint films.