Antimicrobial Chemotherapy
Division A is concerned with the discovery, mode of action, development and use of antimicrobial agents, and the mechanisms by which infective agents develop resistance to these compounds.

Microbial Pathogens
Division B is concerned with understanding the biology of microbial pathogens and microbial factors participating in virulence.

Clinical Microbiology Web Site
Division C is involved with methods for detection, isolation, identification, characterization, and antimicrobial susceptibility testing of clinically significant microbial pathogens or their products of diagnostic significance, e.g., toxins, antigens, nucleic acids. Also involved with diagnosis-oriented investigations of these microorganisms.

Microbe-Host Interactions
Division D is concerned with understanding microbe interactions with the host during health and disease.

Immunology Web Site
Division E is interested in immunity to bacteria, fungi, parasites and viruses, cellular and molecular mechanisms of humoral and cellular immunity, phagocytic cells and constitutive host defenses, cytokines, immunomodulation by microbes, microbial products and other factors (e.g. stress, nutrition), adjuvants and vaccine development.

Medical Mycology Web Site
Division F encompasses the biochemistry, molecular biology, genetics, morphogenesis, pathogenesis, immunology, epidemiology, laboratory identification, in situ detection, and taxonomy of fungi, especially those known to cause disease in man and other animals, and the therapy of those diseases.

Mycoplasmology Web Site
Division G encompasses the genetic, pathogenic, immunogenic, taxonomic, biochemical, and clinical aspects of the animal, human, plant and insect mycoplasmas (Mollicutes).

Genetics and Molecular Biology
Division H encompasses genetic and molecular biological studies of the regulation and detailed mechanisms of transcription, translation, and replication in microbial systems.

General Microbiology
Division I encompasses a diverse range of interests including the growth, development, behavior and ecology of the entire spectrum of microorganisms.

Cell and Structural Biology Web Site
Division J is concerned with ultrastructural analyses of microbial cells and of communities of microbial cells adherent to surfaces using biochemical, genetic, and microscopical techniques which yield information concerning organization on the molecular, cellular, and community levels.

Microbial Physiology and Metabolism Web Site
Division K encompasses the integration of biophysical, biochemical, molecular biological, genetic and other approaches to understanding structure/function relationships of diverse microorganisms. Microbial physiology includes the study of microbial metabolism, enzymology, cell envelopes, transport, responses to environmental fluctuations, growth, differentiation, and other related processes.

Healthcare Epidemiology
Division L encompasses the microbiology and epidemiology and clinical features (including pathogenesis, diagnosis, control and treatment) of healthcare-related and other hospital and institutionally related infections and all levels of basic through applied research and clinical trials of interventions to reduce the occurrence or provide prompt diagnosis and effective treatment of such infections.

Bacteriophage Web Site
Division M is composed of researchers dedicated to the study of bacterial viruses. Current topics of interest are: assembly and structure, genome structure, initiation of infection, regulation of transcription and translation, replication, recombination, repair, viral-host interactions, new phage systems and molecular cloning technology.

Microbial Ecology
Division N encompasses the ecology of natural microbial assemblages and laboratory approaches that help us understand microorganisms in natural environments, such as water, soils and in higher organisms.

Fermentation and Biotechnology Web Site
Division O serves members with interests in the molecular biology, genetics, biosynthesis, and bioconversions of natural products including antibiotics, xenobiotics, and macromolecules produced by procaryote and eucaryote microorganisms and animal cell cultures. Programming is directed toward modern molecular aspects of biotechnology and industrial microbiology.

Food Microbiology Web Site
Division P is concerned with fundamental and applied microbiology on food-associated organisms: their growth, identification, biosyntheses, control, interaction with hosts, genetics, toxin production, influence on food quality and safety, and application in food fermentations.

Environmental and General Applied Microbiology Web Site
Division Q serves microbiology from both applied and environmental fields, including the traditional fields (public health microbiology; disinfection; environmental virology; water and wastewater microbiology) and developing fields (biodegradation of xenobiotics; corrosion; microbial interactions with metals; biofouling; aerosolized microorganisms; environmental considerations for genetically engineered microorganisms; soil and subsurface microbiology).

Evolutionary and Genomic Microbiology Web Site
Division R is a forum for the study of microbial diversity and systematics, and development of the laboratory, bioinformatic and conceptual tools required to characterize and understand the evolution of genes, genomes and organisms.

DNA Viruses
Division S is concerned with basic and applied microbiology of animal viruses with DNA genomes.

RNA Viruses
Division T represents all ASM members interested in the structure replication, pathogenesis, and epidemiology of RNA-containing viruses of prokaryotic and eukaryotic cells.

Mycobacteriology Web Site
Division U is composed of members involved with mycobacteria and its diseases, on a research, diagnostic, public health, or teaching basis.

Clinical and Diagnostic Immunology Web Site
Division V (i) promotes research toward understanding the processes involved in the host immune system and its responses; encourages development and application of antibody, antigen, and molecular-based diagnostic procedures to assess the integrity and functioning of components of the host immune system, and supports clinical approaches to immune-mediated diseases; (ii) promulgates information on antibody, antigen and molecular-based diagnostic procedures, including the significance, interpretation and limitations of these assays; and (iii) encourages standardization and quality control of procedures and reagents used in clinical and diagnostic immunology laboratories.

Microbiology Education Web Site
Division W provides a forum for members interested in microbiology education at all levels, including pre-college, college and university, and health professional curricula.

Molecular, Cellular and General Biology of Eukaryotes
Division X encompasses researchers dedicated to the study of nucleated cells of both microbial and higher organisms. Current topics of interest include molecular mechanisms of basic cellular processes, structure and function of subcellular oganelles, and evolutionary biology and ecology of eukaryotic microbes.

Public Health Web Site
Division Y serves members with a primary interest in public health practice and infectious diseases. Involves the contributions of microbiology to surveillance, epidemic investigations and other public health activities.

Animal Health Microbiology
Division Z is the forum for investigators whose interests encompass the diseases of animals (e.g. companion, food and exotic) and the control or treatment of those diseases using antimicrobial agents, vaccines, probiotics, etc. Current topics of interest include animal pathogen diagnostics, veterinary or zoonotic pathogen antimicrobial susceptibility testing, surveillance/ epidemiological studies, new technologies to reduce on farm zoonotic pathogens, immunology and pathogenesis.

Free-Living, Symbiotic and Parasitic Protists
Division AA's purpose is to bring together those with interests in all aspects (e.g., behavior, biochemistry, cell biology, chemotherapy, cultivation, ecology, evolution, genetics, life cycle, molecular biology, morphogenetics, natural history, pathogenesis, parasitology, phylogenetics, physiology, systematics, taxonomy, and ultrastructure) of eukaryotic microbes that include those known as the "single-celled, unicellular or acellular organisms," protozoans, the lower algae, and the lower fungi.