E2 Genus Brucella Flashcards Preview

Bacteriology > E2 Genus Brucella > Flashcards

Flashcards in E2 Genus Brucella Deck (43)
Loading flashcards...
1

What organs do bacteria from the genus Brucella infect?

Reproductive organs
(both male and female)

2

What ages are affected by the genus Brucella?

Sexually mature animals

3

What species of Brucella is not zoonotic?

Brucella ovis

4

What is species in the most pathogenic in humans?

Brucella melitensis

5

What is the gram reaction and cultural characteristics of bacteria in the Brucella genus?

1. Gram negative small rods
2. Aerobic or microaerophilic
3. Slow growth

6

What cells do bacteria in the Brucella genus infect?

1. Macrophages
2. Endothelial cells

7

How does Brucella infect reproductive organs?

Infection of mucous membranes
Bacteremia spread to reproductive organs

8

How long is the incubation period for Brucella infection?

LONG
(1-2 months before clinical signs)

9

What disease do bacteria from the genus Brucella cause in humans?

Undulant fever

10

What is the disease caused by Brucella abortus in cattle?

Bang's disease

11

What is the reservoir for Brucella abortus?

Wild ruminants

12

What is the prevalence of Brucella abortus in US cattle herds?

Nearly eradicated

13

What is the most frequent route of infection for Brucella abortus?

GI tract
(but can occur through any mucus membrane)

14

When does Brucella abortus cause abortions in cattle?

Late abortions

15

What effects if any does Brucella abortus have in male cattle?

1. Orchitis
2. Epididymitis

16

How does Brucella abortus affect fertility in male cattle?

Can lead to sterility!

17

How does Brucella abortus cause abortions in cattle?

1. Uldercation of endometrium
2. Destruction of placental villi in cotyledons

18

How long do infections with Brucella abortus last in cattle?

They are infected for life!

19

What other species besides cattle can be infected with Brucella abortus?

1. Horses
2. Sheep & goats
3. Pigs
4. HUMANS

20

What diseases can be caused by Brucella abortus in horses?

1. Fistulous withers
2. Poll evil

21

Does Brucella abortus cause abortions in horses?

Rarely!

22

How does Brucella abortus typically infect humans?

Via cuts in the skin

23

How is Brucella abortus usually diagnosed?

1. Clinical signs
2. Direct smears from infected tissue
3. ELISA (confirmatory test)

24

Is there a vaccine available for Brucella abortus?

Yes
(DIVA vaccine)

25

What animals are typically infected with Brucella suis?

Swine
(more host specific)

26

How is Brucella suis usually transmitted in pigs?

Venereal transmission
(semen)

27

Is there a vaccine for Brucella suis?

No
(depopulation of herd)

28

What are the clinical signs of Brucella suis in male pigs?

Orchitis

29

What animals can be infected by Brucella melitensis?

1. Goats & sheep
2. Cattle
3. Humans

30

What is the disease called in humans infected by Brucella melitensis?

Malta fever