Rhodococcus

Question 1

To what Order does Genus rhodococcus belong

Answer 1

Actinomycetales

Question 2

The only rhodococcus species known to cause lesion

Answer 2

Rhodococcus equi

Question 3

What is the disease in foals caused by Rhodococcus equi

Answer 3

Purulent pneumonia

Question 4

2 forms of Rhodococcus equi

Answer 4

Coccoid and Bacillary

Question 5

At solid media, Rhodococcus takes on the _______ form

Answer 5

Coccoid

Question 6

At liquid media, Rhodococcus takes on the __________ form

Answer 6

Bacillary

Question 7

True or False,

Rhodococcus bacteria are Gram positive but stains readily with other dyes?

Answer 7

True

Question 8

What is visible/demonstrated when Rhodococcus equi is grown in milk

Answer 8

Metachromatic granules

Question 9

What is the shape of Rhodococcus capsul

Answer 9

Lamellar Polysaccharide

Question 10

True or False,

Rhodococcus equi grows well in milk

Answer 10

False, it grows poorly in milk

Question 11

At early stages of R. equi colonies, it is translucent/white but suddenly turns into _______ color

Answer 11

Pinkish/Red

Question 12

What substance is produced by R. equi that reacts with Phospholipase D of Corynebacterium pseudotuberculosis

Answer 12

Phospholipase and Cholesterol Oxidase

Question 13

At what temperature can this bacteria be killed

Answer 13

Pasteurization temperature (60 degrees celsius)

Question 14

True or False,

R. equi is resistant to 0.01% sodium hydroxide

Answer 14

False, sodium azide HAHAHAHAHA

Question 15

In strangles, the upper respiratory tract and head is infected, while R. equi causes an infection in the _______________________

Answer 15

Lower Respiratory Tract (lungs)

Question 16

True or False,

R. equi can ferment Carbohydrates

Answer 16

False, it cannot

Question 17

True or False,

R. equi is Catalase positive but Urease negative

Answer 17

False, R. equi is both catalase and urease positive

Question 18

Give an example of Selective Medium

Answer 18

1. Nalidixic acid
2. Novobiocin
3. Cycloheximide
4. Potassium tellurite

Question 19

What is the substance known to enhance the absorption for antibiotics

Answer 19

Rifampicin