The purpose of the study was to validate the Epsilometer test (E-test) method for antimicrobial susceptibility testing of selected periodontopathic microorganisms. ETEST is a well-established method for antimicrobial susceptibility testing in microbiology laboratories around the world. ETEST consists of a predefined. We describe the applicability of the E test (AB Biodisk Solna, Sweden), a new method for determining minimum inhibitory concentrations of antimicrobial agents.

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Like the agar disk diffusion method, the E test is easy to execute.

Etest – Wikipedia

The E test would be particularly useful in cases for which an MIC of penicillin is required for suspected penicillin-resistant pneumococci, for determining the level of oxacillin resistance in staphylococci, and for measuring the MICs of ampicillin and vancomycin for Enterococcus faecium isolates from severe infections. The E-test ICs for ampicillin, cefoxitin, and metronidazole against the Gram-negative capnophilic and microaerophilic rods and the black-pigmented anaerobic rods ICs for ampicillin, clindamycin, metronidazole, and tetracycline showed a high percentage of agreement with the agar dilution MICS.

Anti-gonococcal activity of gemifloxacin against fluoroquinolone-resistant strains and a comparison of agar dilution and ETEST methods.

All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License. Activities of 13 quinolones by three susceptibility testing methods against a collection of Haemophilus influenzae isolates with different levels of susceptibility to ciprofloxacin: National Committee for Clinical Laboratory Standards: The E test represents a new innovative approach for the determination of antimicrobial suscetibility which is potentially applicable to a wide array of drugs and micro-organisms.

E-test: a new technique for antimicrobial susceptibility testing for periodontal microorganisms.

The purpose of the study was to validate the Epsilometer test E-test method for antimicrobial susceptibility testing of selected periodontopathic microorganisms using the agar dilution method as a standard. How to cite this article. The results are read in the intersection of the ellipse with a MIC scale on the strip figure 2.


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In the study of Jorgensen et al, Streptococcus penumoniae and 50 Hemophilus influenzae that demonstrated various resistance mechanisms and levels of anti-microbial suscetibility were examined by E tests performed on agar media currently recommended by the NCCLS HTM and Muller-Hinton sheep blood agars, respectively. Performance standards for antimicrobial disk diffusion test standard, M2-T4, 2nd ed.

Measurement of the susceptibility of microorgan isms epsolometer antimicrobial agents is of great impor tance in the rational use of antimicrobial agents, in the evaluation of new drugs, and in epidemiological studies. The most frequently used method in Brazil is disk diffusion 3, The antibiotics tested were clindamycin, metronidazole, tetracycline, ciprofloxacin, cefoxitin, and ampicillin at concentrations epsilometeer and below the achieved blood or gingival crevicular fluid levels.

Diag Microbiol Inf Dis, The E test approach may be well suited for the testing of certain fastidious bacteria or bacteria that is difficult to test. However, the work involved in preparing the trays and the substantial costs of purchasing the laboratory hardware for in-house preparation may detract from the convenience of this method.

ETEST® | bioMérieux

E-test is a laboratory test used to determine minimum inhibitory concentration MIC and whether or not a specific strain of bacterium or fungus is susceptible to the action of a specific antibiotic. This page was last edited on 21 Augustat The plate should not be read if the culture appears mixed or if the lawn of growth is too light or too heavy.


The E test inhibition ellipses were clearly demarcated, and the points of intersection of the zone edge with the strips were generally easy to interpret figure 2. Dilution testing by agar method is also standardized method and a reliable susceptibility testing technique that may be used as a reference for evaluating the accuracy of other testing systems.

E test strip is placed on to an inoculated agar plate; there is an immediate release of antibiotics from the plastic carrier surface into the agar surface. More than antibiotics are eppsilometer available in the product range for testing of aerobic bacteria and fastidious organisms such as Pneumococci, Haemophilus, H.

The major disadvantages of the agar dilution are the time-consuming and the labor-intensive tasks of preparing the plates and epsiloemter, especially as the number of different antimicrobial agents to be tested against each isolate epxilometer.

The use of microdilution trays prepared in house allows simultaneous testing of several antimicrobial agents against individual organisms and also provides a reliable standardized reference method for susceptibility testing.

Retrieved from ” https: Download brochure Add to my selection For More Information. Meningitis due to mixed infection with penicillin-resistant and penicillin-susceptible strains of Streptococcus pneumoniae.

The deficiencies of the disk diffusion test are its non-quantitative interpretation and its inapplicability to many fastidious organisms and anaerobes. Skip to main content.