Accuracy of the evaluation method for alkaline agents’ bactericidalefficacies in solid, and the required time of bacterial inactivation

[摘要] An alkaline agent, namely food additive grade calcium hydroxide (FdCa (OH)2)in the powder form, was evaluated for its bactericidal efficacies in chicken feces at pH13. The point for this evaluation was neutralization of the alkaline agent’s pH at thetime of bacterial recovery, since otherwise the results are substantially misleading.Without neutralization of the FdCa (OH)2 pH, the spiked bacteria were killedwithin min at the time of recovery in aqueous phase, but not in the solid form in feces,hence, it has been demonstrated that when bacteria were in solid, it took longer time thanin liquid for the alkaline agent to inactivate them down to the acceptable level (≥3log10 CFU/ml).

[学科分类] 兽医学

[关键词] food additive grade calcium hydroxide;infection control/disinfection;livestock biosecurity;poultry production