Problem to be solved: to provide an antibody for detection of Haemophilus influenzae which is excellent in detection sensitivity and detection accuracy (species specificity).An antibody or fragment thereof or an derivative that produces an antigenic reaction with an epitope present in the N-terminal domain (NTD) comprising an amino acid residue of 1 to 40 of the ribosomal protein L7 / L12 of the influenza bacterium.Diagram
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