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Advanced Diagnostic Laboratories

Identification of Acid Fast Bacilli

Test Code



This test is used for identification of acid fast bacilli (AFB) or partially acid fast organisms. Identification is performed to the greatest extent possible, which is usually to the species level but can be to the subspecies level for some organisms (e.g. Mycobacterium abscessus subsp. abscessus). See below for the different platforms, assays, and techniques that may be employed. 

This test is ordered for pure isolates sent to the laboratory for identification (e.g. AFID). It does not need to be ordered separately for clinical samples that require organism identification since it is automatically included in those tests (e.g. AFB1 and AFB3).