ALLERGEN (Allergen), antigenhoe, ki dar ashkhosi nisbati onho hassos aksu- lamali allergiro ba vujud meovarand. Aksulamali allergi tadrijan badi ba organizm vorid shudani A. (pas az 24 – 72 soat) ogoz megardad, vale agar dar khuni bemor oid ba hamin A. podtan (jismi be- gona) mavjud boshad, on teztar, yane badi 15 – 20 daqiqa ba vuqu meoyad. Vobasta ba paydoish A.-ho maishi, pusti, insektisidi va g. meshavand. Muchibi allergiya metavo- nad gardi rastani, changi khona, matohoi sintezi, baze khurokvoriho, doruvoriho va dig. A.-ho boshad. A. ba organizm vorid shuda, dar boftahoi limfoidi podtan hosil mekunad. Dar naticha moddahoi ba- roi organizm zahrnok (gistamin, atsetil- kholin, geparin, bradikinin) hosil mesha- vand. Nig. niz Allergiya.