PROBLEM TO BE SOLVED: To provide an antibacterial agent composition safe, stable and having high antibacterial properties to Legionella bacteria.SOLUTION: Provided is a method for producing a liquid antibacterial composition containing antibacterial peptide and a silver compound, including: a step where the pH of an antibacterial peptide aqueous solution is adjusted to 7 to 9 and a step where a silver compound is added thereto in such a manner that the molar ratio between the amino acid residue of the antibacterial peptide and the silver compound (amino acid residue/silver) reaches 1 to 15 so as to be dissolved.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】安全および安定で、レジオネラ菌に高い抗菌性を有する抗菌剤組成物を提供する。【解決手段】抗菌性ペプチドと銀化合物を含有する液状抗菌剤組成物の製造方法であって、抗菌性ペプチド水溶液のpHを7~9に調整する工程と、銀化合物を抗菌性ペプチドのアミノ酸残基と銀化合物のモル比(アミノ酸残基/銀)が1~15となるように添加し溶解する工程を含むことを特徴とする液状抗菌剤組成物の製造方法。【選択図】図1
