Question
This genus contains a bacterium sometimes spread by armadillos, which can invade Schwann cells and lead to severe nerve damage. For 10 points each:
[10m] Name this genus of bacteria. A species of bacteria in this genus attacks macrophages after entering the lungs, forming granulomas and causing infected patients to cough up blood.
ANSWER: Mycobacterium [or Mycobacteria; accept Mycobacterium leprae; accept Mycobacterium tuberculosis]
[10e] Mycobacteria such as those that cause tuberculosis are often identified by an “acid-fast” form of this technique. This technique applies dyes to specimens to make them more visible under a microscope.
ANSWER: staining [or word forms; accept acid-fast staining or Ziehl–Neelsen staining]
[10h] The presence of phenol in this dye allows it to penetrate the lipid-rich walls of Mycobacteria, making it the primary stain used in the acid-fast stain. This dye is also sometimes used instead of safranin as a counterstain in Gram staining.
ANSWER: carbol fuchsin [or carbolfuchsin; or Castellani’s paint; accept basic fuchsine]
<Virginia Tech A, Biology>
Summary
| California | 2025-02-01 | Y | 3 | 10.00 | 67% | 33% | 0% |
| Florida | 2025-02-01 | Y | 3 | 6.67 | 33% | 33% | 0% |
| Great Lakes | 2025-02-01 | Y | 6 | 13.33 | 100% | 33% | 0% |
| North | 2025-02-01 | Y | 3 | 6.67 | 67% | 0% | 0% |
| Overflow | 2025-02-01 | Y | 5 | 18.00 | 80% | 60% | 40% |
| Pacific Northwest | 2025-02-01 | Y | 2 | 5.00 | 50% | 0% | 0% |
| South Central | 2025-02-01 | Y | 2 | 20.00 | 100% | 50% | 50% |
| Southeast | 2025-02-01 | Y | 4 | 10.00 | 75% | 25% | 0% |
| UK | 2025-02-01 | Y | 10 | 13.00 | 100% | 20% | 10% |
| Upper Mid-Atlantic | 2025-02-01 | Y | 8 | 11.25 | 63% | 38% | 13% |
| Upstate NY | 2025-02-01 | Y | 3 | 10.00 | 100% | 0% | 0% |
Data
| Cornell B | Johns Hopkins A | 10 | 10 | 0 | 20 |
| George Washington A | Haverford A | 0 | 0 | 0 | 0 |
| John Jay College | Penn B | 0 | 0 | 0 | 0 |
| Haverford B | Maryland B | 0 | 10 | 0 | 10 |
| NYU A | Maryland A | 10 | 10 | 0 | 20 |
| NYU B | Columbia C | 0 | 10 | 0 | 10 |
| Columbia B | Penn A | 10 | 10 | 10 | 30 |
| Vassar A | Rutgers A | 0 | 0 | 0 | 0 |