DEY ENGLEY NEUTRALIZING AGAR is used in disinfectant testing where neutralization of the antiseptics and disinfectants is important for determining its bactericidal activity. Use of a strong bacteriostatic substance having the ability to inhibit the growth and reproduction of potentially harmful bacteria, may lead to insufficient disinfection procedure, if the bacteria survive the procedure and causes serious infection under favourable conditions. Thus, to differentiate between bacteriostatic and bactericidal action of the disinfectant, Dey and Engley developed this media which determines the disinfectant’s efficacy by neutralizing a broad spectrum of antiseptics and disinfectants including quaternary ammonium compounds, phenolics, iodine and chlorine preparations, mercurials, formaldehyde and glutaraldehyde. The media are gamma irradiated in the packaging material to assure a reduction of the microbial load potentially present in the medium, on the dishes, and on the packaging materials.
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