title: On the allergic origin of the Jarisch-Herxheimer reaction.
mesh_terms: D000937:Antigen-Antibody Reactions; D001491:Basophils; D001706:Biopsy; D001792:Blood Platelets; D004342:Drug Hypersensitivity; D004804:Eosinophils; D006801:Humans; D066298:In Vitro Techniques; D007958:Leukocyte Count; D008214:Lymphocytes; D009504:Neutrophils; D010406:Penicillins / Q000009:adverse effects*; D012882:Skin Tests; D013587:Syphilis / Q000188:drug therapy* / Q000276:immunology*
chemical_list: D010406:Penicillins