tuberculosis - 2024 ARCADIA

Question

Robert Koch developed his four postulates to describe the causes of this disease. For 10 points each:

[10m] Name this disease. Koch also discovered PPD, a solution of proteins injected under the skin to screen for a wheal response to this disease in the Mantoux test.

ANSWER: tuberculosis [or TB; accept consumption]

[10h] Ziehl and Neelsen built on Koch’s work with the acid-fast stain, which stains bacteria such as M. tuberculosis with carbolfuchsin (“car-bohl-F’YOOK-sin”) and uses this dye as a counterstain. This dye is also used to count live eukaryotic cells, but is less useful for that purpose compared to a “trypan” dye of the same color.

ANSWER: methylene blue [or MB; or methylthioninium chloride; reject “methylene” or “methyl blue”] (Trypan blue only stains dead cells, while methylene blue can also stain live cells.)

[10e] Koch also developed these ubiquitous microbiology devices, which he used to discover M. tuberculosis. Fanny Hesse first proposed using agar gel in these shallow plastic plates.

ANSWER: Petri dishes

<AS, Biology>

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Summary


2024 ARCADIA at BU	2024-12-06	Y	7	15.71	100%	57%	0%
2024 ARCADIA at Duke	2024-12-06	Y	3	16.67	100%	67%	0%
2024 ARCADIA at Missouri S&T	2024-12-06	Y	2	15.00	100%	50%	0%
2024 ARCADIA Online	2025-05-17	Y	5	22.00	100%	80%	40%
2024 ARCADIA at Penn State	2024-12-06	Y	2	15.00	100%	50%	0%
2024 ARCADIA at Florida Tech	2024-12-06	Y	4	12.50	100%	25%	0%
2024 ARCADIA at UC Berkeley	2024-12-06	Y	2	20.00	100%	100%	0%
2024 ARCADIA at Waterloo	2024-11-09	Y	7	18.57	100%	86%	0%
2024 ARCADIA at GT	2024-12-06	Y	4	15.00	75%	75%	0%
2024 ARCADIA at Illinois	2024-11-09	Y	4	20.00	100%	100%	0%
2024 ARCADIA at Warwick	2024-12-06	Y	5	16.00	100%	20%	40%
2024 ARCADIA at Claremont	2024-11-02	Y	3	20.00	100%	33%	67%

Data


Brandeis A	Amherst	10	0	10	20
Bowdoin A	Harvard	0	0	10	10
Tufts B	Bowdoin C	0	0	10	10
BU	Clark House	0	0	10	10
MIT	Boston College B	10	0	10	20
Tufts A	Brandeis B	10	0	10	20
Boston College A	Yale	10	0	10	20
Virginia Tech A	North Carolina B	10	0	10	20
Virginia Tech B	South Carolina	10	0	10	20
Virginia Tech C	North Carolina A	0	0	10	10
Missouri	WashU	10	0	10	20
In the Mood for Buzz	Social credit go vroom	10	10	10	30
Madmen and Specialists	Toyota Tundra Turbos — Twisting Truths - Tackling Trivia - Taming Titans	10	0	10	20
Old and Young	The cult of SGA	0	0	10	10
ASU->Stanford->ASU pipeline	bingy academy	10	0	10	20
she limp on my waltz till i feel pathetique	Paddington in Peru (2024)	10	10	10	30
Pitt	Maryland	10	0	10	20
Penn State	RIT	0	0	10	10
Florida Tech	UF B	0	0	10	10
UCF B	UF C	0	0	10	10
USF	UCF A	0	0	10	10
UF A	Valencia	10	0	10	20
Toronto Chestnut Rice and Kamehameha	Carleton A	0	0	10	10
Waterloo Aspidistra	Ottawa Absolomabsolomabsolom	10	0	10	20
Waterloo Aspidistra	Ottawa Absolomabsolomabsolom	10	0	10	20
Waterloo Aspidistra	Ottawa Absolomabsolomabsolom	10	0	10	20
Waterloo Aspidistra	Ottawa Absolomabsolomabsolom	10	0	10	20
Waterloo Aspidistra	Ottawa Absolomabsolomabsolom	10	0	10	20
Waterloo Aspidistra	Ottawa Absolomabsolomabsolom	10	0	10	20
Waterloo Aspidistra	Ottawa Absolomabsolomabsolom	10	0	10	20
Waterloo Aspidistra	Ottawa Absolomabsolomabsolom	10	0	10	20
Toronto B	McMaster ApocolocyntosisBidii	10	0	10	20
Toronto Disband the Club 2k24	Toronto A	10	0	10	20
McGill A	Waterloo Basic	10	0	10	20
Waterloo Cloze	Toronto Metropolitan A	10	0	10	20
Berkeley Past	Berkeley A	10	0	10	20
Stanford	Berkeley B	10	0	10	20
Innovation Academy A	Georgia Tech A	10	0	10	20
Georgia Tech B	Innovation Academy C	10	0	10	20
Lambert	Milton	0	0	10	10
Johns Creek	Mississippi State	10	0	0	10
Southampton	Imperial A	0	10	10	20
Cambridge A	LSE A	10	10	10	30
LSE B	Bristol	0	0	10	10
Warwick B	Warwick A	0	0	10	10
Warwick C	Cambridge B	0	0	10	10
Chicago A	Notre Dame	10	0	10	20
Purdue B	Illinois Blue	10	0	10	20
Illinois Orange	Purdue A	10	0	10	20
SIUE	Chicago B	10	0	10	20
SGV Ventures	ALCU	0	0	10	10
Anderson et al.	U[C]SD	0	10	10	20
Claremont	Jason et al.	10	10	10	30
Squidward Community College	Truman	0	0	10	10