It is of course well recognized that the length of time required by a germicide to kill a given number of bacteria varies with the concentration of the substance. The relation between concentration and time can usually be expressed by the formula Ct k, often written in logarithmic form log t = log kn log c for convenience The obvious value of the concentration exponent n is that it gives direct...

The Support of Research in the Bio-Sciences for the Fiscal Years 1952 and 1953: Stella L. Deignan and Esther Miller .................. 661 Verbal Habits and the Visual Recognition of Words: Leo Postman a d Beverly Conger ................ ............................. 671 Wendell Clark Bennett: 1905-1953: Cornelius Osgood .................................... 674 News and Notes American Assoeiati...

The widespread use of formalin, copper sulphate, and other germicides in seed treatment for the control of seed-transmitted diseases is generally attended by decreased and retarded seed germination. Pathogens on the seed coats, present as dry bacteria, fungus spores, or dormant mycelium, are usually in a resting stage and as such require the use of disinfectants in a fairly strong concentration...

PURPOSE OF REVIEW This article reviews recent publications relevant to endoscope reprocessing and the potential for transmission of infection during gastrointestinal endoscopy. RECENT FINDINGS There have been a number of established reprocessing failures of gastrointestinal endoscopes at various healthcare facilities across the US resulting in patient notifications. These episodes have been a...

We tested the germicide activity of 1% Chloramin BM, 1% Incidin Plus, 1% Lysoformin 3000, 0.2% Mikasept KP, and 2% Sekusept Forte against viruses in suspension (suspension test) and dried onto a surface (carrier test). The agents of the porcine encephalomyelitis (Porcine teschovirus, strains CAPM V-86, CAPM V-37), Aujeszky’s disease (strains CAPM V-166, CAPM V-327) and vesicular stomatitis (str...