PROBLEM TO BE SOLVED: To provide an antibody or a fragment thereof that assists in the reduction, prevention, and/or treatment of Salmonella infection. An isolated antibody or antibody fragment containing an amino acid sequence consisting of a specific sequence, or a variant thereof. [Selection diagram] Figure 2【課題】サルモネラ感染症の減少、予防、及び/又は治療を補助する抗体又はそのフラグメントの提供。【解決手段】特定の配列からなるアミノ酸配列、又はその変異体を含む単離された抗体又は抗体フラグメント。【選択図】図2