Topics: Microscopy, Staining, Prokaryotic cells, Eukaryotic Cells, Metabolism, Bacteria, culturing, Microbial Genetics, Gene Transfer, Genetic Engineering, Taxonomy, viruses, Eukaryotic Microorganisms, Sterilization, Disinfection, Antimicrobial Therapy, Host-Microbe Relationships, Disease Processes, Epidemiology, Nosocomial Infections, Innate Host Defenses, Adaptive Immunity, Immunization, Immune Disorders, Urogenital Transmitted Diseases, Sexually Transmitted Diseases, Respiratory System, Oral Diseases, Gastrointestinal Diseases, Cardiovascular Diseases, Lymphatic Diseases, Systemic Diseases, Nervous System, Environmental Microbiology, Applied Microbiology