There are many formal agreements that exist between countries regarding the standards and process to allow understanding and standardization of results globally. This is extremely important as ensure consistency globally. Many of the international standards at a minimum have similarities to that specified by the World Health Organization
With respect to testing standards between test laboratories internationally there is a global association for Testing Laboratories. The Australian Government’s NATA and the National laboratory accreditation bodies in the USA. NATA accredited laboratory test results are recognized by the following bodies:
American Association for Laboratory Accreditation Website:
www.a2la.org
ANSI-ASQ National Accreditation Board Website:
www.aclasscorp.com
Laboratory Accreditation Bureau Website:
www.l-a-b.com
International Accreditation Service Inc. Website:
www.iasonline.org
National Voluntary Laboratory Accreditation Website:
www.nise.gov/nvlap