The present invention relates to a method for determining if an individual is infected by a staphylococcus bacterium, comprising:determining if antibodies directed against at least 2 proteins comprising a sequence selected from the group consisting of SEQ ID NO: 2, SEQ ID NO: 4, and SEQ ID NO: 6, are present in a biological sample of the individual, anddeducing therefrom that the individual is infected by a staphylococcus bacterium.