Lab 4- Rhodococcus

Question 1

Habitat

Answer 1

Soil, plant, gut (horse)

Question 2

Morphology

Answer 2

Coccus-rod cycle

Capsule

Question 3

Staining

Answer 3

Gram positive

Some are acid-fast

Question 4

Culture

Answer 4

Simple: nutrient agar, broth

Pigment (pink)
Capsule

Question 5

Pathogenicity

Answer 5

INTRACELLULAR!

Foal pneumonia
Horse gut
Mesenteric lymph nodes, abscesses (cattle, swine)
Human pneumonia (immunosuppression, AIDS)

Question 6

Species ?

Answer 6

R. Equi

Question 7

Culture (Ana-aerobe?)

Answer 7

Obligate aerobe

Question 8

CAMP test results?

Answer 8

Positive

Question 9

OF test results?

Answer 9

Negative

Question 10

How many serotypes ?

Answer 10

10

Question 11

What is special about Rhodococcus and foals ?

Answer 11

Cause foal pneumonia
1-4 months old foals (big abscesses in lungs)
Ulcerative enteretitis, arthritis
From dust inhalation!!

Question 12

What type of colonies can produce pigment?

Answer 12

S-type colonies

Mucoid colonies