3.3.EX Lab diag (Gram positive bacilli) Flashcards

1
Q

Cellular morphology:
Gram +
Branching filamentous rods

Colonial morphology:
White
Opaque
“Molar tooth” resemblance

A

Actinomyces israelii

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Cellular Morphology:
Diphtheroid
End of the cell may be pointed (Fusiform), bent, club shaped, spatulated, etc.

“Dog bones”
“Starlike aggregates”
“V or Y arrangements / Palisade”

Colonial appearance:
Small
Cream-white
Convex
Shiny with irregular edge

A

Bifidobacterium spp.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

48 hr colony <1mm (+)
Rough colony (+)
Branched bacilli (+)
Catalase (-)
Indole (-)

Molar tooth colony

A

Actinomyces israelii

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

48 hr colony <1mm (-)
Rough colony (-)
Branched bacilli (-)
Catalase (-)
Indole (-)

Rod w/ forked ends

A

Bifidobacterium spp.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

48 hr colony <1mm (-)
Rough colony (-)
Branched bacilli (-)
Catalase (+)
Indole (+)

A

Propionibacterium acnes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly