Antimicrobial susceptibility of Helicobacter pylori determined by the E test using tetrazolium egg yolk agar.
Metronidazole and tetracycline E tests were compared to an agar dilution method for the antimicrobial susceptibility testing of Helicobacter pylori. Sixteen strains were tested by using tetrazolium egg yolk (TEY) agar. The characteristic E test inhibition ellipse was clearer on TEY agar than on standard blood agar and gave results comparable to those of the agar dilution test. The use of TEY medium is preferable to that of blood agar medium in E test MIC determinations for H. pylori.
Department of Pathology, Universidad Peruana Cayetano Heredia, Lima, Peru.
Y
Y
Valdez
B
B
Velapatiño
R H
RH
Gilman
V
V
Gutierrez
C
C
León
D000362:Agar; D003470:Culture Media; D004530:Egg Yolk; D016481:Helicobacter Infections / Q000382:microbiology; D016480:Helicobacter pylori / Q000187:drug effects / Q000254:growth & development* / Q000302:isolation & purification; D006801:Humans; D008795:Metronidazole / Q000494:pharmacology*; D008826:Microbial Sensitivity Tests / Q000379:methods; D013752:Tetracycline / Q000494:pharmacology*; D013778:Tetrazolium Salts
D003470:Culture Media; D013778:Tetrazolium Salts; D008795:Metronidazole; D000362:Agar; D013752:Tetracycline