12 (pg. Optochin is a chemical that is toxic to some bacteria but harmless to others. A. Optochin (P) disks (6 mm, 5 µg) can be obtained from a commercial vendor. This test determines whether the bacterium is either sensitive (susceptible) to optochin or resistant to the chemical. PubMed 14. 587-98) Crossref. Other alpha-hemolytic streptococcal species are optochin -resistant. Learn term:optochin+test = tests organisms sensitivity to optochin with free interactive flashcards. Choose from 15 different sets of term:optochin+test = tests organisms sensitivity to optochin … JM. Objective. The optochin test is less time-consuming than the bile solubility test. A, Rodriguez. This test is performed on blood agar medium using a disk diffusion principle. Optochin sensitivity allows for the presumptive identification of alpha-hemolytic streptococci as S. pneumoniae, although some pneumococcal strains are optochin-resistant. WJ, Campos. It is useful in the identification of Streptococcus pneumoniae, the alpha-hemolytic Streptococcus most commonly susceptible to this chemical.This test determines whether the bacterium is either sensitive (susceptible) to optochin or resistant to the chemical. Information and translations of optochin in the most comprehensive dictionary definitions resource on the web. Optochin Sensitivity Test: Principle, Procedure, Results and Quality Control. Related Articles. Search ADS. Performing the optochin test . What does optochin mean? JM, Keith. Optochin Susceptibility Test What is the purpose of the test? Pikis. Optochin Susceptibility test is used to determine the effect of optochin reagent (<5 μg/ml) on an organism. Molecular basis of the optochin-sensitive phenotype of pneumococcus: characterization of the genes encoding the F 0 complex of the Streptococcus pneumoniae and Streptococcus oralis H +-ATPases, Mol Microbiol, vol. Biochemical tests in Microbiology Pyrrolidonyl Arylamidase (PYR) Test: Principle, procedure and results November 12, 2013 Acharya Tankeshwar Biochemical tests in Microbiology, Laboratory Diagnosis of Bacterial Disease 2. Optochin sensitive S. pneumoniae surrounding the disc are lysed due to the chemical optochin that changes in surface tension, resulting in zone of inhibition. The optochin test is widely used in the form of filter paper discs, impregnated with ethylhydrocupreine hydrochloride, which are applied directly to inoculated plates before incubation. Optochin-resistant Streptococcus pneumoniae [abstract], Pediatr Res, vol.

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