title: Hypersensitivity reactions in guinea pigs to group A hemolytic streptococci.
mesh_terms: D000367:Age Factors; D000818:Animals; D000941:Antigens; D002473:Cell Wall; D005260:Female; D006168:Guinea Pigs; D006968:Hypersensitivity, Delayed; D007114:Immunization; D008297:Male; D010323:Passive Cutaneous Anaphylaxis; D012882:Skin Tests; D013297:Streptococcus pyogenes / Q000276:immunology*
chemical_list: D000941:Antigens