Microbiological investigations with decentral dosing apparatuses for disinfectants. Part 2: Resistance-behaviour of isolated bacteria
Heinzel, M.; Bellinger, H.
Zentralblatt für Bakteriologie Mikrobiologie und Hygiene. 1. Abt. Originale B Hygiene 176(1): 47-54
1982
ISSN/ISBN: 0932-6073 PMID: 7113512 Document Number: 184797
When bacteria were isolated from disinfectant solutions of dosing apparatuses their resistance observed in those solutions is rapidly lost during few passages on nutrient agar (Table 1). Bacteria in tap-water, too, show an increased resistance against that disinfectant (Table 2) but it could be reversed by EDTA (Table 3). Therefore, the resistance of bacteria observed in tap-water and disinfectant solution is not determined genetically but results from a temporary adaptation which may be caused by an increased secretion of slime. This resistance is only observed in solution but not after application of the disinfectant to surfaces; it is not dependent from the dosing apparatus but from the product used. Only one species (Corynebacterium rubrum) which occasionally was found showed a primarily increased resistance which is stable during isolation.