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Appl Environ Microbiol. 1966 January; 14(1): 1-7
Copyright © 1966 American Society for Microbiology. All Rights Reserved.

Microbiology of Drycleaning

Robert R. Banville and Ethel McNeil

Clothing and Housing Research Division, Agricultural Research Service, U.S. Department of Agriculture, Washington, D.C.

ABSTRACT

An appreciable number of bacteria on contaminated fabric survived modern drycleaning procedures. Various stages in the process, especially steam pressing, reduced the total number of bacteria, but viable organisms were found on certain areas of garments even after pressing. A significant number of bacteria were redeposited on clean fabric during the washing of ordinary soiled garments in drycleaning units. These bacteria included gram-positive cocci, diphtheroid bacilli, and gram-positive sporeformers. Gram-negative bacilli were seldom found, although some gram-negative bacilli survived drycleaning. The redeposited organisms apparently came mainly from other garments in the same loads, as few bacteria were isolated from the filtered solvent used for washing. The number of bacteria in the drycleaning washwheel was highest shortly after the beginning of the wash, and decreased, with the exchange of solvent in the wheel, to a low level at the end. Although it appears that in most cases several factors combine to reduce to a low level the numbers of bacteria on articles cleaned in a well-operated drycleaning plant, it would seem that under certain conditions pathogenic microorganisms could be disseminated by drycleaning.

Appl Environ Microbiol. 1966 January; 14(1): 1-7
Copyright © 1966 American Society for Microbiology. All Rights Reserved.





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Copyright © 1966 by the American Society for Microbiology. All rights reserved.