U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 28, 2025
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All TitlesTitle 21Chapter IPart 866Subpart C - Subpart C—Microbiology Devices
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(a) Identification. A microorganism differentiation and identification device is a device intended for medical purposes that consists of one or more components, such as differential culture media, biochemical reagents, and paper discs or paper strips impregnated with test reagents, that are usually contained in individual compartments and used to differentiate and identify selected microorganisms. The device aids in the diagnosis of disease.
(b) Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to § 866.9.