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June 19, 1926


JAMA. 1926;86(25):1925-1926. doi:10.1001/jama.1926.02670510047026

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Experiments with Disinfectants  Some experiments on disinfectants carried out by the Institute for the Teaching of Public Hygiene in Cluj have reference to conditions of use in dwellings. Fluid disinfectants used were phenol (carbolic acid), calcium hypochlorite, mercuric chloride and sodium permanganate, while formaldehyde and sulphurous acid were the gaseous disinfectants tried. The organisms of typhoid, diphtheria, cholera and tuberculosis were selected, and were placed in solutions of broth, milk or melted gelatin as well as on cloth, unvarnished or unpainted wood, linen and wall paper. Formaldehyde vapor seemed superior to sulphurous acid in the case of tuberculous sputum, dried on linen or paper. Mercuric chloride, 1: 1,000, destroyed all microbes; phenol, 5 per cent solution, all but anthrax spores. The length of exposure was twenty-four hours in each case. Calcium hypochlorite destroyed only the less resistant microbes, though it proved highly successful with anthrax spores on linen and paper.

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