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  • Title: [Bactericidal effect of hydrated lime in aqueous solution].
    Author: Muñoz Ruiz C, Collazo Ponce A, Alvarado FJ.
    Journal: Bol Oficina Sanit Panam; 1995 Apr; 118(4):302-6. PubMed ID: 7779285.
    Abstract:
    This study determined the bactericidal effect of the supernatants of saturated solutions of common lime and of micronized calcium hydroxide (Ca(OH)2) (1500 mg/L), which was used as a control, compared with disinfectants made of solutions of 0.33% colloidal silver (0.0016 mg/L), toluene sulfachloramine (41 mg/L) with sodium bicarbonate (9 mg/L), and sodium hypochlorite (5 mg/L). The test involved four strains of Vibrio cholerae 01, V. parahaemolyticus, Escherichia coli, Salmonella typhimurium, Shigella flexneri, Sh. sonnei, and Sa. enterititidis. These bacteria were inoculated into the bactericidal substances listed above and, after different incubation times, the number of surviving bacteria was determined in vitro by using a counting plate. The results were expressed in colony-forming units (CFU). An in situ estimate was made of the amount of V. cholerae on 35 strawberries and 35 radishes (having a weight of about 10 g per unit) after they were washed under a flow of potable water, submerged in the supernatant of the saturated lime solution (1.5 g/L), or both. The greatest bactericidal effect was obtained against V. cholerae 01 and was observed in 3 minutes. Other enterobacteria were resistant to the effect for up to 30 minutes.
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