Gram Positive Rods

Question 1

Erysipelothrix rhusiopathiae causes disease in what type of animals?

Answer 1

Fish and birds

Question 2

How is Erysipelothrix rhusiopathiae transmitted to humans?

Answer 2

Occupational exposure, excreta of animals, rose-growers

Question 3

Erysipelothrix rhusiopathiae is catalse ___ (pos/neg), indole (pos/neg), bile esculin (pos/neg), urease (pos/neg), nitrate (pos/neg), VP (pos/neg)

Answer 3

Negative for all!

Question 4

Erysipelothrix rhusiopathiae produces what biochemical?

Answer 4

H2S

Question 5

What is the gram stain morphology of Erysipelothrix rhusiopathiae?

Answer 5

Long, branching, pleomorphic gram positive rod

Question 6

What are the three clinical infections caused by Erysipelothrix rhusiopathiae

Answer 6

Septicimia, endocarditis, and erysipeloid (lesions)

Question 7

In a gelatin stab cx, what org has a “pipe-cleaner” and “test tube brush” apperance?

Answer 7

Erysipelothrix rhusiopathiae

Question 8

Nocardia asteroides can cause three types of clinical infections

Answer 8

Nocardiosis– pulmonary (immunocomp), lymphocutaneous, and skin abscesses

Question 9

This branching, gram positive rod is an intracellular pathogen

Answer 9

Nocardia

Question 10

What genre produces a “musty basement odor”

Answer 10

Nocarida

Question 11

Describe the colony morphology of Nocardia asteroides

Answer 11

Orange, glaborous, wavy colonies on 7H11

Question 12

What is the species of Nocardia that DOES NOT hydroloze caesin, tyrosine, or xanthine?

Answer 12

Nocarida asteroides

Question 13

What species of Nocardia hydrolyzes caesin and tyrosine, but NOT xanthine?

Answer 13

N. brasiliensis

Question 14

What acid-fast organism is POSITIVE for caesin, tyrosine, and xanthine hydrolysis?

Answer 14

Streptomyces

Question 15

What genre has a “dry and chalky” morphology?

Answer 15

Nocardia

Question 16

Nocardia can grow up to what temperature?

Answer 16

50C

Question 17

Listeria monocytogenes is _____ (motile/nonmotile), hydrolyzes _________ (biochemical), and has what type of hemolysis?

Answer 17

Motile (tumbling), bile esculin, beta

Question 18

Describe the motility of Listeria monocytogenes on wet mount

Answer 18

Tumbling motility

Question 19

Describe the motility of Listeria monocytogenes in semisolid agar

Answer 19

Umbrella

Question 20

What is the preferred incubation temperature for Listeria monocytogenes?

Answer 20

25C

Question 21

Where is Listeria monocytogenes found?

Answer 21

Dairy products and deli meats

Question 22

Does bacillus species form spores?

Answer 22

Yes

Question 23

Bacillus anthracis is _____ (non-motile/motile), _____ (hemolytic/non-hemolytic) and catalase ____ (pos/neg)

Answer 23

non-motile, non-hemolytic, catalase positive

Question 24

What type of anthrax: Industrial or non-industrial?

The cutaneous inoculation or inhalation of anthrax spores by individuals cleaning or industrially processing contaminated leather hides, wool, or bone from contaminated animals.

Answer 24

Industrial

Question 25

What type of anthrax: Industrial or non-industrial?

The acquisition of the organism from close contact with infected animals or with their carcasses or tissues

Answer 25

Non-industrial

Question 26

What is the main way that you get anthrax?

Answer 26

Handling contaminated wool hides

Question 27

What differential Corynebacterium media contains eggs

Answer 27

Loffler’s

Question 28

What confirmation test is required to confirm toxicity of C. diptheriae before reporting

Answer 28

ELEK test