American Society for Microbiology
- Conferences, journals, public policy and funding issues, topical reports, and links.
- http://www.asm.org/

Scottish Microbiology Society
- A scientific and social forum for microbiologists based in Scotland.
- http://www.scottish-microbiology.org.uk/

The Biofilm Institute
- The Biofilm Institute is a non-profit, public-benefit corporation dedicated to providing information and education about microbial biofilms.
- http://www.biofilm.org/

Society for Anaerobic Microbiology
- The Society is interested in all anaerobic microbiology research, from any environment. Membership is open to anyone with an interest in anaerobic microbiology.
- http://www.bms.ed.ac.uk/services/webspace/sam/

Federation of European Microbiological Societies
- Devoted to the promotion of microbiology in Europe. FEMS is linking 42 microbiological societies.
- http://www.fems-microbiology.org/

The Biofilm Club
- The Biofilm Club is a society for the discussion of the properties, development and ecology of bacterial, fungal and multispecies biofilms.
- http://www.biofilmclub.co.uk/

Society of Protozoologists
- Information about protists, protozoa, and activities of the organization.
- http://www.uga.edu/~protozoa/

European Society of Clinical Microbiology and Infectious Diseases
- ESCMID's objectives are the promotion of training and research in the laboratory and good practice in the clinical management of infection.
- http://www.escmid.org

Society for Applied Microbiology
- The oldest microbiological society in the UK, with more than 1700 members worldwide. It is dedicated to advancing the science of microbiology.
- http://www.sfam.org.uk