AST

Question 1

BACTERIA THAT REQUIRES AST:

1. common
2. occasionally
3. rarely

FACTORS INFLUENCING AST DECISIONS (3)

Answer 1

1. Staphylococcus, Enterococci, S. pneumoniae, Viridans streptococci, Acinetobacter, P.aeruginosa, Enterobacteriaceae
2. H.influenzae, M.catarrhalis, N. gonorrhoeae, Anaerobic bacteria
3. Beta-hemolytic streptococci, N. meningitidis, L.monocytogene

Body site, presence of other bacteria, Host status

Question 3

CRITERIA FOR EVALUATION OF ANTIBIOTICS:

1. lowest conc. of antimicrobial agent which inhibits
   bacterial growt
2. lowest conc. of antimicrobial agent that kills bacteria
   when subcultures in a fresh medium
3. lowest conc. of antibiotic needed to kill bacterial growth
4. cutoff point
   - normal dosage
   - higher dosage
   - not responding

Answer 3

1. Minimum Inhibitory Concentration
2. Minimal Lethal Concentration
3. Minimum Bactericidal Concentration
4. Breakpoint
   - susceptible
   - intermediate
   - resistant