1. Clinical microbiology, bacterial clonal identification, and molecular epidemiology of Gram-positive bacterial pathogens . 2. Antimicrobial resistances, infection control, and dissemination of drug resistant genes among the bacterial flora of the community. 3. Microbial ecology and host interactions regarding the dynamic of colonization by microorganisms as commensal bacterial and the capacity of these microorganisms to acquire genomic elements to induce infection in the host, especially in high-risk populations. 4. Preservation and management of cultures collections. Identification of microorganisms for taxonomy purpose using molecular methods