Metronidazole /KLH is a conjugate of Metronidazole and Keyhole Limpet Hemocyanin (KLH). By conjugating the antigen with the protein adjuvant , the production of antigen-specific antibodies in vaccine models can be enhanced. The conjugate does not affect protein folding or disrupt major epitopes and can enhance cross-presentation and the generation of antigen-specific T cells.