Tsvetelina Paunova-Krasteva is an Associate Professor at the Department of General Microbiology and a research assistant at Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences. She received her Ph.D. at the Bulgarian Academy of Sciences. Her research areas include fine structures of pathogenic and non-pathogenic microbial species, cytochemical and immunocytochemical localization of enzymes and biopolymers, changes in ultrastructural and cytochemical characteristics due to culture regimes, including immobilization on various matrices and nanomaterials and under the action of biosurfactants, signal molecules and physicochemical factors, cell-to-cell antigen variations, and biofilm structure and activation or inhibition of biofilm growth.