Features of Colonies

Question 1

According to Growth Conditions

Answer 1

1. Rapid growers (<5 days)
2. Intermediate growers (6-10 days)
3. Slow growers (>11 days)

Question 2

According to Texture

Answer 2

1. Glabrous
2. Velvety
3. Yeast-like
4. Cottony
5. Granular

Question 3

According to Topography

Answer 3

1. Rugose
2. Folded
3. Crateriform
4. Verrucose
5. Cerebriform

Question 4

• Leather-like, or waxy little mycelium;

- seems to merge with the agar

Answer 4

Glabrous

Question 5

• Resembles plush or suede,

- short aerial hyphae of equal length

Answer 5

Velvety

Question 6

• resembles Staphylococcus spp. colonies;
• “bacteria-like” / waxy-pasty,
• no aerial mycelium
• delicate fringe around the colonies in BAP

Answer 6

Yeast-like

Question 7

• Wooly or “floccose”

- many long aerial hyphae; entangled

Answer 7

Cottony

Question 8

• Powdery due to heavy conidiation or sporulation
• even hyphae
• abundant conidia

Answer 8

Granular

Question 9

• radial groves from the center toward the rim

Answer 9

Rugose

Question 10

• random folds

Answer 10

Folded

Question 11

• w/ central depression
• surrounded by raised edges
• resembles S. pneumoniae

Answer 11

Crateriform

Question 12

• many warts or rough knobs on the surface

Answer 12

Verrucose

Question 13

• brain-like convolutions

Answer 13

Cerebriform