Rhodococcus Flashcards Preview

Bacteriology Exam 1 > Rhodococcus > Flashcards

Flashcards in Rhodococcus Deck (14):
1

Shape?

Cocci or rods

2

Oxygen?

Aerobic soil saprophyte

3

Motile?

No

4

Characteristic culture growth appearance

Mucoid salmon-pink colonies

5

Mycolic acid

Yes, weak

6

What species and age is most often infected?

Foals <6 mo. old

7

Where do Rhodococcus survive?

In macrophages

8

What is the hypothesized reason that foals are susceptible to Rhodococcus?

Inappropriate Th2- rather than Th1-based immune response

9

What does Rhodococcus cause?

Suppurative bronchopneumonia

10

What virulence factor promotes the survival of the bacterium in non-activated macrophages?

vapA protein

11

What virulence factors retards phygocytosis?

Capsular polysaccharides, mycolic acids

12

What species of Rhodococcus infects foals, pigs, cattle, and cats?

R. equi

13

What treatments are available for Rhodococcus?

Combination therapy of macrolide antibiotic and rifampicin

14

What is the mortality rate without treatment?

80%