Gram Positive Bacilli

Question 1

Spore forming? Yes
Beta Hemolytic/Motile? Yes

Answer 1

Bacillus Sp.
“Boxcars”
Food poisoning

Question 2

Spore forming? Yes
Beta Hemolytic/Motile? No

Answer 2

B. anthrasis
Anthrax
“Medusa head colonies”

Question 3

Spore forming? No
Branching? Yes

Answer 3

Nocardia
-beaded, branching chains
-partially acid fast
-immunocompromised-invasive pulmonary and disseminated infections

Question 4

Spore forming? No
Branching? No
Catalase? Yes
Motility/Bile esculin? Yes

Answer 4

Listeria
-Neonates & Immunocompromised-septicemia & meningitis
-Umbrella Growth at RT
-Dairy products

Question 5

Spore forming? No
Branching? No
Catalase? Yes
Motility/Bile esculin? No

Answer 5

Corynebacterium
-“Chinese letter” morphology
-Metachromatic granules-methylene blue
-black agar colonies (brown halo)

Question 6

Spore forming? No
Branching? No
Catalase? No
H2S Production? Yes

Answer 6

Erysipelothrix
-Skin infection from fish

Question 7

Spore forming? No
Branching? No
Catalase? No
H2S Production? No

Answer 7

Lactobacillus
-normal vaginal flora

Gardnerella vaginalis
-squamous vaginal cells