Topics: Medical Microbiology, infection, immune response, sterilization, disinfection, infection conteol, pathogeneic viruses, viral infection, respiratory viruses, poxviruses, enteroviruses, hepatitis viruses, herpesviruses, zoonotic viruses, rabies, retroviruses, Human T-Lymphotropic Virus, Human Immunodeficiency Virus, Acquired Immunodeficiency Syndrome, papilloma virus, polyoma virus, pathogenic bacteria, bacteria, bacterial infection, antibacterial agents, antibacterial resistance, staphylococci, streptococci, enterococci, Corynebacterium listeria, bacillus, mycobacteria, actinomyces, nocardia, clostridium, Bacteroides, Anaerobes, Neisseria, Haemophilus, bordetella, vibrio, camplyobacter, helicobacter, Enterobacteriaceae, Legionella, Coxiella, Pseudomonas, Opportunistic Gram-negative Bacilli, Plague, Bacterial, Zoonotic Diseases, Spirochetes, Mycoplasma, Chlamydia, Rickettsia, Ehrlichia, Anaplasma, Bartonella, Dental Infections, Periodontal Infections, Opportunistic Fungi Candida, Aspergillus, Zygomycetes, Pneumocystis, Pathogenic Parasites, Parasites Pathogenesis, Diagnosis of Parasitic Infection, Antiparasitic Agents, Antiparasitic Resistance, Apicomplexa, Microsporidia, Sarcomastigophora, Amebas, Flagellates, Intestinal Nematodes, Tissue Nematodes, Cestodes, Trematodes