ACT/MIR Beta-Lactamases

The ACT/MIR Beta-Lactamases test detects ACT and MIR enzymes, which belong to the AmpC family of beta-lactamases produced by certain bacteria. These enzymes can break down many commonly used beta-lactam antibiotics, making infections difficult to treat. Identifying the presence of ACT/MIR beta-lactamases helps determine whether antibiotic resistance is involved and supports clinicians in choosing a more effective treatment. This test is usually performed on bacterial isolates obtained from clinical samples as part of antimicrobial resistance testing.

Who Should Get This Test Done?

This test may be recommended for:

●     Individuals with bacterial infections that do not respond to commonly prescribed beta-lactam antibiotics.

●     Individuals with recurrent or persistent infections where antibiotic resistance is suspected.

●     Hospitalised patients, especially those with healthcare-associated infections caused by Gram-negative bacteria.

●     Individuals with culture-positive bacterial infections requiring detailed antimicrobial resistance testing.

●     Individuals whose healthcare provider needs additional information to guide appropriate antibiotic therapy.

Why Consider This Test?

This test:

●     Detects ACT and MIR beta-lactamase enzymes associated with antibiotic resistance.

●     Helps identify bacteria that may be resistant to several beta-lactam antibiotics.

●     Supports selection of the most appropriate antibiotic treatment.

●     Reduces the chances of ineffective antibiotic use and unnecessary changes in therapy.

●     Provides valuable information for infection control and antimicrobial stewardship efforts.

More Information

ACT and MIR are plasmid-mediated AmpC beta-lactamases that can spread between bacteria, contributing to the growing challenge of antimicrobial resistance. Their presence may limit the effectiveness of several antibiotics, including certain cephalosporins and penicillins. Detecting these resistance enzymes is particularly important in serious or hospital-acquired infections, where timely and targeted treatment can make a significant difference in patient care.

Other Names

●     ACT/MIR AmpC Beta-Lactamases Test

●     ACT/MIR AmpC Resistance Detection

●     ACT/MIR Beta-Lactamase Gene Detection

●     ACT/MIR AmpC Enzyme Detection

●     ACT/MIR Resistance Marker Test