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H Bellinger

Publications and source records attributed to H Bellinger.

6 recordsLinked to original sources
PubMed1987

[Thirty years of disinfection 1955-1985].

The article deals with disinfectants and disinfection during 1955-1985 and analyses the disinfectant lists no. 1-6 made up by the German Society for Hygiene and Microbiology. It is shown that changes in test methods may influence the composition of disinfectants. During the time taken in consideration a change from phenols/phenol derivatives as main active material in disinfectants to aldehydes took place. Main active materials in hand disinfectants are the alcohols ethanol, iso-propanol and n-propanol. Since 1974 (list no. 4) the number of products based on PVP-iodine for hand disinfectants increases. Strikingly quaternary ammonium compounds in detergent disinfectants increase as well as sole active material or in combination with aldehydes. This depends on the fact, that their acceptance is well because they are less smelling. On the other hand in combination with aldehydes they make it possible to reduce the amount of bad smelling aldehydes.

Disinfectants↗
PubMed1982

[Microbiological investigations with decentral dosing apparatuses for disinfectants. Part 2: Resistance-behaviour of isolated bacteria (author's transl)].

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.

Bacteria↗
PubMed1981

[Microbiological investigations with decentral dosing apparatuses for disinfectants. Part 1: investigations of cell number (author's transl)].

Cell numbers have been investigated for several months in disinfectant solutions which were measured out with tap water by decentral automatically dosing apparatuses. They differed not only quantitatively but also qualitatively with respect to the products used: With one product on the bases of aldehydes + organic tin compound 3 h after samples have been collected up to 100 bacteria/100 ml could be cultivated. Thus, cell numbers in disinfectant solutions were in the same range of cell numbers of tap water. Sometimes the cell numbers in both substrates seem to go parallel (Fig. 1). The bacterial compositions in both were similar (Table 3); gramnegative, yellow bacteria of the genera Pseudomonas and Flavobacterium dominated. After the disinfectant in one apparatus has been substituted by one which is composed of aldehydes + a quaternary ammonium compound cell numbers rapidly and permanently decreased to the limit of detectability. Only coryneform bacteria survived for a longer time which were characterized (Tab. 4) but not determined taxonomically. Their facultatively methylotrophic growth was conspicuously.

Bacteria↗