06 - Infectious Agents

Question 1

(bacteria)

1. most bacteria can’t be id’ed on morph alone -> but use a gram stain and use empirical therapy

Question 2

(fungi)

1. what is this?
2. often found where?
3. wall characteristics?
4. found where in country?

Answer 2

1. histoplasma capsulatum
2. within phags
3. thin, non-staining wall
4. middle 1/3 of country

Question 3

(fungi)

1. what is this?
2. wall characteristics?
3. prolific in lesion
4. found where in US?

Answer 3

1. blastomyces dermatitidis
2. thick, blue wall w/ broad based budding
3. SE

Question 4

(fungi)

1. what is this?
2. wall characteristics?
3. broad or narrow based budding?

Answer 4

1. cryptococcus
2. thick, nonstaining wall
3. narrow

(blasto is broad)

Question 5

(fungi)

1. what is this?
2. wall?
3. contains what?
4. geo?
5. how easy to find?
6. how different from blasto?

Answer 5

1. coccidioides immitis
2. thick blue wall
3. endospores (sometimes)
4. SW US desert
5. difficult
6. cocc larger, has double refractile wall, blasto buds/cocc sporulates

Question 6

(fungi)

1. what is this? (football shaped)
2. skin/mucosal or systemic mostly?

Answer 6

1. sporothrix schenckii (ZOONOTIC!)
2. skin/mucosal

Question 7

(fungi)

1. what is this?

Answer 7

1. candida albicans

(form pseudohyphae -> do NOT branch)

Question 8

(fungi)

1. what is this?

Answer 8

1. aspergillus spp.