Abstract
Two commercial systems for testing the antimicrobial susceptibility of bacteria were evaluated in a collaborative study at two sites using 306 freshly isolated clinical strains. Gram-negative bacteria were tested with the Micur RST 02 and gram-positive bacteria with the Micur RST 03, systems for MIC titration. For categorization of bacterial susceptibility into sensitive, intermediate or resistant, the Micur ST 02 and 03 were used for gram-negative and gram-positive bacteria respectively. The broth microdilution technique served as reference method. A total of 3672 MIC pairs were determined. MICs obtained with the Micur RST 02/03 were found to be 96.9 % in agreement (± one log2 dilution) with the reference method results. The inter-laboratory and intra-laboratory reproducibility for the Micur RST tested with four ATCC reference strains was 97.5 % and 98.5 % respectively. Categorization of bacterial susceptibility with the Micur ST 02/03 agreed with 94.9 % of the Micur RST results and 91.6 % of the reference method results. On account of their accuracy, reproducibility and long shelf-life the Micur RST and ST systems offer a convenient method for testing antimicrobial susceptibility of bacteria in the clinical microbiology laboratory.
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References
Washington, J. A.: Infectious diseases 1979 — antimicrobial susceptibility tests. Journal of Infectious Diseases 1979, 140: 261–263.
Dickert, H., Machka, K., Braveny, I.: The uses and limitations of disc diffusion in the antibiotic sensitivity testing of bacteria. Infection 1981, 9: 18–24.
Wiedemann, B.: Problems concerning multicenter studies on drug resistance. In: Mitsuhashi, S., Rosival, L., Krcméry, V. (ed.): Antibiotic resistance. Springer, Berlin, 1980.
Kaufmann, H., Neussel, H., Linzenmeier, G.: Probleme der Empfindlichkeitstestung von Bakterien mit dem Agardiffusionstest. Arzneimittelforschung 1973, 23: 743–746.
Wieczorek, L.: Empfindlichkeitstestung mit dem Micur-System. In: Linzenmeier, G. (ed.): Aktuelle Aspekte zur bakteriologischen Resistenzbestimmung. Vieweg, Wiesbaden, 1982, p. 84.
National Committee for Clinical Laboratory Standards: Proposed standard PSM-7. Standard method for dilution antimicrobial susceptibility tests for bacteria which grow aerobically. NCCLS, Villanova, PA, 1980.
Ericsson, H. M., Sherris, J. C.: Antibiotic sensitivity testing. Report of an international collaborative study. Acta Pathologica et Microbiologica Scandinavica (B) 1971, Supplement 217: 1–90.
Jones, R. N., Barry, A. L., Bigelow, J., Gavan, T. L., Thornsberry, C.: Evaluation of the Micur system for quantitative antimicrobial susceptibility testing: a multiphasic comparison with reference methods. Journal of Clinical Microbiology 1982, 16: 153–163.
Jones, R. N., Thornsberry, C., Barry, A. L., Gavan, T. L.: Evaluation of the Sceptor microdilution antimicrobial susceptibility testing system: a collaborative investigation. Journal of Clinical Microbiology 1981, 13: 184–194.
Jones, R. N., Gavan, T. L., Barry, A. L.: The evaluation of the Sensititre microdilution antibiotic susceptibility system against recent clinical isolates: a three laboratory collaborative study. Journal of Clinical Microbiology 1980, 11: 426–429.
Kooperative Studie an elf Zentren: Bewertung eines neuen Systems zur Antibiotika-Empfindlichkeitsprüfung harnwegpathogener Bakterien. Diagnostik und Intensivtherapie 1981, 14: 375–390.
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Kayser, F., Machka, K., Wieczorek, L. et al. Evaluation of the Micur microdilution systems for antibiotic susceptibility testing of gram-negative and gram-positive bacteria. Eur. J, Clin. Microbiol. 1, 361–366 (1982). https://doi.org/10.1007/BF02019935
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DOI: https://doi.org/10.1007/BF02019935