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The medium or media of choice used to recover Legionella is:

Isolates from CSF that are gram-negative coccobacilli, grow on chocolate agar in CO2 but not blood agar, require factor V but not X, and are nonhemolytic on rabbit or horse blood may be identified as:

Organisms belonging to the genus Legionella are:

The commensal Neisseria spp. are often confused with pathogenic gram-negative diplococci. A simple test utilizing a blood agar plate and an antibiotic disk resulting in elongation of the cells assists in the differentiation of these organisms. Which antibiotic disk is utilized in this application?

The sputum of a 75-year-old man with chronic lung infections yields the following: Many gram-negative coccobacilli in Gram stain X and V factors required for growth Nonhemolytic on rabbit blood agar The organism can be identified as

To increase the sensitivity of direct Gram-stain examination of body fluid specimens, the specimens are usually:

Ensuring that all foods derived from animal sources are thoroughly cooked, all milk is pasteurized, and all drinking water is chlorinated are ways to avoid becoming infected with:

@X@user.full_name@X@ @GMU: ACS-Which of the following is the weakest reducing agent? Au1+ + 1e- → Au E° = 1.680 Mn2+ + 2e- → Mn E° = -1.180 Ag1+ + 1e- → Ag E° = 0.800 Cu2+ + 2e- → Cu E° = 0.340

@X@user.full_name@X@ @GMU: ACS-Radioactive substances decay by first-order kinetics. How many days would be required for a sample containing iodine-131 to decrease to 67.42% of its initial activity? The half-life of iodine-131 is 8.07 days.

@X@user.full_name@X@ @GMU: ACS-It took 600.2 s for 67.16% of a substance to react according to first-order kinetics. What is the value of the rate constant?