Topics: Cell Structure, Bacteria, Microorganisms.Microbial Metabolism, Bacterial Infection, Human Microbiota, Spore-Forming Gram-Positive Bacilli, Bacillus, Clostridium Species, Aerobic Non–Spore-Forming Gram-Positive Bacilli, Corynebacterium, Listeria, Erysipelothrix, Nocardia, Pathogens, Staphylococci, Streptococci, Enterococci, Genera, Enterobacteriaceae, Pseudomonas, Acinetobacter, Burkholderia, Stenotrophomonas, Vibrio, Aeromonas, Campylobacter, Helicobacter, Haemophilus, Bordetella, Brucella, Francisella, Yersinia, Pasteurella, Neisseriae, Legionella, Bartonella, Mycobacteria, Spirochetes, Treponema, Borrelia, Leptospira, Mycoplasmas, Cell Wall–Defective Bacteria, Rickettsia, Genera, Chlamydia spp, Antimicrobial Chemotherapy, virology, bacteriology, Parvoviruses, Adenoviruses, Herpesviruses, Poxviruses, Hepatitis Viruses, Picornaviruses, Parasitology, Diagnostic Medical Microbiology, AIDS, Lentiviruses, Human Cancer Viruses, Rabies, Slow Virus Infections, Prion Diseases, Coronaviruses, Paramyxoviruses, Rubella VirusOrthomyxoviruses, Influenza Virus