Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector8113310.17816/kazmj81133Research ArticleOn the question of the value of agglutinating serumsKarpovS P.info@eco-vector.comTimakovV. D.info@eco-vector.com15091932328-96526552509202125092021Copyright © 2021, Eco-Vector2021<p>Agglutinating sera, as a means for determining the physiognomy of this or that microorganism, took one of the first places in microbiology.</p>Kazan Medical archiveКазанский медицинский архив