Use of a composition for the treatment of the surfaces of buildings for livestock farming and / or its material in order to eliminate and / or inhibit pathogenic protozoa, characterized in that said composition consists essentially of the association of an alkylamine and of a quaternary ammonium or of a quaternary ammonium derivative chosen from the following group: - compounds of the quaternary ammonium ion, (hydrogenated tallow alkyls) trimethyl, chlorides, -compounds of the quaternary ammonium ion, coconut alkyl trimethyl, chlorides, - quaternary ammonium ion compounds, benzyl coconut alkyl bis (hydroxetil), chlorides, - quaternary ammonium ion compounds, benzyl coconut alkyl dimethyl, chlorides, - quaternary ammonium ion compounds, coconut dialkyls dimethyl, chlorides, - ion compounds quaternary ammonium, bis (hydrogenated tallow alkyl) dimethyl, chlorides, - quaternary ammonium ion compounds, soybean alkyl trimethyl, chlorides, - compue these quaternary ammonium ion, C8-18 benzylalkyl dimethyl, chlorides, - quaternary ammonium ion compounds, C12-18 benzylalkyl dimethyl, chlorides, - quaternary ammonium ion compounds, dialkyl C6-12 dimethyl, chlorides, - compounds quaternary ammonium ion, benzylalkyl at C8-16 dimethyl, chlorides - compounds of the quaternary ammonium ion, benzylalkyl at C12-16 dimethyl, chlorides - compounds from the quaternary ammonium ion, dialkyl at C8-10 dimethyl, chlorides, - compounds from the quaternary ammonium ion , (oxydiethanediyl-1,2) bis [coco alkyldimethyl], dichlorides, - compounds of the quaternary ammonium ion, C12-18 alkyl [ethylphenyl) methyl] dimethyl, chlorides, - compounds of the quaternary ammonium ion, bencialkyl in C10-16 dimethyl , chlorides, - compounds of the quaternary ammonium ion, benzylalkyl in C12-18 dimethyl, salts with benzisothiazolin-1,2-one-1-3 (2H) dioxide-1 (1: 1), - compounds of the quaternary ammonium ion, dialkyl at C8-18 dimethyl, chlorides, - compue These are quaternary ammonium ion, C12-14 bencialqui
