Kazan medical journalKazan medical journal0368-48142587-9359Eco-Vector5877210.17816/kazmj58772Research ArticleBiology of the tubercle bacillusMazurB. L.<p>Dr</p>info@eco-vector.comTherapeutic Clinic of the Kazan State University120419262243803852001202120012021Copyright © 2021, Mazur B.L.2021<p><span class="JLqJ4b ChMk0b" data-language-for-alternatives="en" data-language-to-translate-into="ru" data-phrase-index="0">Long before the discovery of the pathogen tbc, botanists used a double color: they stained their preparations with an alkaline or alcoholic solution of methylene blue, and then again with an aqueous solution of Vesuvine.</span> <span class="JLqJ4b ChMk0b" data-language-for-alternatives="en" data-language-to-translate-into="ru" data-phrase-index="1">He was also aware of the fact that sometimes, with such a double stain, some parts of the preparation from the plant parenchyma lose their blue color and are colored in the color of Vesuvine.</span></p>Kazan Medical archiveКазанский медицинский архив