ETEST® strips for AST testing of Piperacillin/Tazobactam

ETEST® PIPERACILLIN/TAZOBACTAM is a newly redesigned ETEST® strip to test antibiotic susceptibility with on-scale Minimum Inhibitory Concentration (MIC) for Piperacillin/Tazobactam, an important antibiotic for serious infections.

  • Exact MIC to reliably determine susceptibility
  • Fight resistance: detection of emerging strains
  • Calibrated against the reference broth microdilution (BMD)
  • Complementary testing to VITEK® 2 automated system
Add to your selection

Do you need more information?

ETEST® P/T: Support optimized therapy

ETEST® PIPERACILLIN/TAZOBACTAM (ETEST® P/T) is a reliable solution for determining MIC of Piperacillin/Tazobactam of Enterobacteriaceae, Pseudomonas aeruginosa and Acinetobacter spp. By determining the exact Minimum Inhibitory Concentration (MIC), you gain more precise susceptibility information to support appropriate prescription and optimized Piperacillin/Tazobactam therapy for challenging situations.

Piperacillin/Tazobactam (Tazocin® and associated generics) is an association of a Piperacillin (ureidopenicillin) with broad spectrum anti-bacterial activity and Tazobactam (β-lactamase-inhibitor) expanding the antimicrobial spectrum. It is used to treat serious infections caused by Gram-negative bacteria including lower respiratory tract infections, urinary tract infections, intra-abdominal infections, bacterial sepsis and others. 


High performance susceptibility testing

ETEST® P/T performance characteristics for Piperacillin/Tazobactam have been established using comparative evaluations at external clinical sites. These studies have shown that ETEST® P/T MICs correlate with the CLSI method when MIC values from both procedures show an essential agreement (EA) of ≥ 90% within ± 1 dilution.



Strains % essential agreement % category agreement
(N) (EA) (CA)
Enterobacteriaceae 773 96.6 94.8
Pseudomonas spp. 119 98.3 95.8




Strains % essential agreement % category agreement
(N) (EA) (CA)
Enterobacteriaceae 775 96.4 99.3
Pseudomonas aeruginosa 119 98.3 93.3
Acinetobacter spp. 83 91.6 89.2


ETEST®: Developments for new resistance challenges

Fast-rising antimicrobial resistance challenges make appropriate use of antimicrobials critical to help limit the emergence of new resistance and preserve the effectiveness of therapeutic options for challenging situations. ETEST® PIPERACILLIN/TAZOBACTAM is one of several new and redesigned ETEST® strips – part of an ongoing commitment to keep up-to-date with evolving microbiology needs. Other recent additions include ETEST® CEFTOLOZANE/TAZOBACTAM and ETEST® CEFTAZIDIME/AVIBACTAM.


Leveraging lab expertise: integrated ID/AST

Innovation in microbiology must never stop – because your lab challenges never stop. For more than 50 years, bioMérieux has shared your commitment to continually strengthen laboratory impact on patient therapy.

ETEST® is part of bioMérieux’s integrated ID/AST* offer. Together with our blood culture offer, these solutions meet your needs from the most routine to the truly challenging. Our offers let you leverage your expertise to deliver test results that enable the healthcare team to provide timely, appropriate therapy.


System Specifications


  • Ref  421166 WW

Single Pack:

  • 30 test strips
  • 1 Package Insert (specific)
Each strip contains:
  • Piperacillin MIC range: 0.016 - 256 µg/Ml
  • Tazobactam: 4 µg/mL


Please consult your local bioMérieux representative for product availability in your country

Pioneering diagnostics