# K250454: HardyDisk Aztreonam/Avibactam 30/20µg (AZA50)

- Pathway: 510(k) (Traditional)
- Applicant: Hardy Diagnostics
- Decided: May 15, 2025 after 86 days
- Product code: JTN (Susceptibility Test Discs, Antimicrobial)
- Device class: 2
- Regulation: 21 CFR 866.1620
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
No later device cites it as a predicate yet.
0 of 1 device in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA’s file for it is a 510(k) statement, which names no predicate.

## Indications for use
HardyDisk AST Disks are used for semi-quantitative in vitro susceptibility testing by the agar diffusion test procedure (Kirby-Bauer) of rapidly growing and certain fastidious bacterial pathogens. Standardized methods for agar diffusion testing have been described for Enterobacterales, Staphylococcus spp., Pseudomonas spp., Acinetobacter spp., Listeria monocytogenes, Enterococcus spp., and by modified procedures, Candida spp., Haemophilus spp., Neisseria gonorrhoeae, Neisseria meningitidis and Streptococcus spp., including Streptococcus pneumoniae. Use of HardyDisk AST Aztreonam/Avibactam 30/20μg (AZA50) for in vitro agar diffusion susceptibility testing is indicated when there is the need to determine the susceptibility of Enterobacterales to Aztreonam/Avibactam, as recognized by the FDA Susceptibility Test Interpretive Criteria (STIC). HardyDisk AST Aztreonam/Avibactam at concentration 30/20μg demonstrated acceptable performance to determine the zone diameter (mm) of Aztreonam/Avibactam against the following microorganisms: Enterobacterales (Citrobacter freundii complex, Escherichia coli, Enterobacter cloacae complex, Klebsiella pneumoniae, Klebsiella oxytoca, Serratia marcescens, Citrobacter koseri, Enterobacter spp., Klebsiella aerogenes, Morganella morganii, Proteus mirabilis, Proteus vulgaris, Providencia rettgeri, Providencia stuartii, Raoultella ornithinolytica, and Serratia spp.)

Source page: https://510kreport.com/device/K250454
Methodology: https://510kreport.com/methodology