[The mutagenicity of organic microcontaminants in the environment. I. The mutagenicity of selected herbicides and insecticides in the Salmonella microsome test (Ames test) with regard to the pathogenic potency of contaminated ground and drinking water].

For determination of the mutagenicity of herbicides and insecticides in working and environmental relevant concentrations we examined 26 pure substances of the chemical groups of polychlorinated alicyclic hydrocarbons, phenoxy fatty acids and and triazines with the Salmonella-microsome-test (S. typhimurium strains TA 97, TA 98, TA 100 and TA 102 with and without metabolic activation with Aroclor 1254 induced rat liver microsome fraction). Only one substance--Chlorthiamide--showed mutagenicity in concentrations of 0.

Amino acid requirements of Staphylococcus aureus strains from Germany and Austria that produce toxic shock syndrome toxin-1 (TSST-1).

Amino acid requirements of 156 toxic shock syndrome toxin-1 (TSST-1) producing Staphylococcus aureus strains from Germany and 37 strains from Austria have been determined. They were compared with TSST-1 negative S. aureus.

[Detection of HIV-1 antigen--determination using 3 different test systems].

51 human sera containing antibodies to human immunodeficiency virus 1 (= HIV-1) were examined for HIV-1-antigen by three different enzyme immunoassay procedures (= EIA) of Abbott, Organon and Dupont. Sensibilities, handling as well as the correlation with the clinical stages of HIV-infection were compared. The EIA's diagnosed in accordance 6 sera which contained HIV-1-antigen and 42 sera to be HIV-1-antigen negative.