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The inoculum effect produces a significant increase in this quantity, which inversely correlates with the diameter of the disk in the Kirby–Bauer disk diffusion test. For 10 points each:
[10h] Name this quantity known by a three-letter acronym. It must be exceeded in both time-dependent killing and concentration-dependent killing.
ANSWER: minimum inhibitory concentration [or MIC]
[10e] The minimum inhibitory concentration increases over time as this property develops. The use of “broad spectrum” agents can promote this property seen in MRSA strains.
ANSWER: antibiotic resistance [or antimicrobial resistance or AMR; accept multidrug resistance or MDR; accept descriptions of bacteria that are resistant to antibiotics]
[10m] The MIC of a drug can be calculated using this technique, which is also used in titer testing for antibodies. In this technique, the concentration is repeatedly halved until a change is observed.
ANSWER: serial dilution [prompt on stepwise dilution or word forms of dilute]
<Biology>

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Summary

2024 ACF Nationals2024-04-21Y2413.7588%42%8%

Data

Berkeley ABrown0101020
Chicago ANorth Carolina A010010
North Carolina BChicago C10101030
Claremont CollegesRutgers010010
WUSTL AColumbia A0101020
OttawaColumbia B010010
MichiganGeorgia Tech0101020
StanfordIndiana0101020
IllinoisJohns Hopkins0101020
KentuckyCornell B0000
NYUMaryland010010
McGillHarvard010010
Minnesota ACornell A0101020
Truman StateMinnesota B010010
Chicago BPurdue010010
South CarolinaChicago D0000
NorthwesternToronto A0101020
Arizona StateToronto B010010
Berkeley BVanderbilt010010
VirginiaPenn010010
FloridaWUSTL B0101020
TexasWaterloo0101020
Yale AIowa State010010
Yale BDuke100010