FDA Grants Breakthrough Therapy Designation to Armata’s AP-SA02 as Phase 3 Phage Trial Approaches
Armata Pharmaceuticals announced on September 14, 2026 that the US Food and Drug Administration has granted Breakthrough Therapy designation to AP-SA02, its intravenously administered fixed bacteriophage cocktail being developed as an adjunct to antibiotics for complicated Staphylococcus aureus bacteremia caused by either methicillin-sensitive S. aureus (MSSA) or methicillin-resistant S. aureus (MRSA). The designation follows positive results from the randomized Phase 1b/2a diSArm study and adds a third major FDA regulatory designation to AP-SA02 after Qualified Infectious Disease Product status in February 2026 and Fast Track designation in May. Illustrative image created by The Phage Therapy. This is not an official photograph from Armata Pharmaceuticals and does not depict actual AP-SA02 commercial packaging. AP-SA02 remains an investigational bacteriophage therapy and is not FDA-approved. The Armata Pharmaceuticals name and logo are used for identification purposes and remain th...