[Sanitation measures in evidence of Legionella]. / Sanierungsmassnahmen beim Nachweis von Legionellen.

Appearance of Legionella disease generally is underrated. Conclusions as to disease frequency from Legionella antibody investigations are not reliable. The number of microbes necessary to produce illness depends from individual preliminary conditions. In special areas of the hospital the rate of diseases caused by Legionella can be reduced by protection. In bathing areas generally the hitherto existing regulations of the Federal Health Authority are sufficient: Continual warm water temperature increases from 60 degrees C, chlorination if necessary, regular stepwise controls. Insufficient results are produced by intermittent temperature increases. Filters that are impermeable for microbes appear uneconomical for bathing areas.

[Occurrence and significance of Actinomycetes in drinking water (author's transl)]. / Vorkommen und Bedeutung von Actinomycetales im Trinkwasser.

Different species of Actinomycetes could be found in the raw-water depending on the origin of the water. The process of water-treatment influenced the total count and the various species in a different mode. Actinomycetes were also isolated from slime which has been formed by microbial growth on PVC coated walls in reservoirs. The typical earthy-musty odour was only found in the genera Streptomyces, were as some species of Nocardia are able to produce a phenolic odour.