Professional organization working to improve the practice and educational standards of the industrial hygiene profession through an accredited certification.
  http://www.abih.org  [Site Details]

Provides an international voice of the occupational hygiene profession through its recognition as a non-governmental organization.
  http://www.ioha.net  [Site Details]

Includes membership and career information, classifieds, calendar, and publications.
  http://www.adha.org  [Site Details]

Details on accreditation and analytical proficiency testing for environmental microbiology labs.
  http://www.aiha.org  [Site Details]

Purpose includes the prevention and control of tropical diseases through research and education.
  http://www.astmh.org  [Site Details]

Content includes scientific articles on tropical medicine, parasitology, infectious diseases, epidemiology, virology and international medicine.
  http://www.ajtmh.org  [Site Details]

For dental hygiene patients, instructors, students, and practitioners.
  http://www.dhed.net  [Site Details]