Actinobacillus spp - Gutierrez

Question 1

Actinobacillus is in the ________ family

Answer 1

Pasteurellaceae

Question 2

Culture of actinobacillus should be done on _________

Answer 2

MacConkey

Question 3

Which is not true about Actinobacillus spp?
A. Fastidious
B. Grows on MacConkey
C. Infects a wide range of hosts
D. Some are NAD dependent
E. Has a capsule

Answer 3

C. Infects a wide range of hosts

FALSE: notable host restriction

Question 4

What actinobacillus spp are of veterinary importance?

Answer 4

1. A. pleuropneumoniae
2. A. suis
3. A. equuli
4. A. lignieresii
5. A. seminis

Question 5

Actinobacillus seminis infects what species?

Answer 5

Sheep and goats

Question 6

Actinobacillus equuli infects what species?

Answer 6

Horses and pigs

Question 7

Actinobacillus lignieresii infects what species?

Answer 7

Bovine

Question 8

Actinobacillus pleuropneumoniae infects what species?

Answer 8

Pigs

Question 9

True or False: Actinobacillus spp forms biofilms which protect it from hostile environments

Answer 9

TRUE

Question 10

________ plays a role in adhesion of actinobacillus spp

Answer 10

LPS

Question 11

Secretion of ______ group of toxins are hemolytic and leukocytic

Answer 11

RTX

Question 12

What is the predisposing factor for infection of actinobacillus?

Answer 12

Viral infections, trauma, stress, low maternal immunity

Question 13

________ is the only actinobacillus spp that is considered a primary pathogen

Answer 13

Actinobacillus pleuropneumoniae

Question 14

Actinobacillus pleuropneumoniae colonizes in the __________

Answer 14

URT of healthy pigs only

Question 15

Reservoir of Actinobacillus pleuropneumoniae?

Answer 15

Tonsils of pigs

Question 16

Which form of Actinobacillus pleuropneumoniae results in high morbidity and mortality?

Answer 16

Peracute / acute form

Question 17

Main toxins involved in the pathogenesis of Actinobacillus pleuropneumoniae?

Answer 17

ApxI - most potent. hemolytic and leukocytic

2. ApxII - less potent. hemolytic and leukocytic
3. ApxIII - potent but not hemolytic

Question 18

Actinobacillus suis colonizes in _________

Answer 18

URT and vagina of healthy pigs

Question 19

Actinobacillus equuli subsp. equuli is known as _________

Answer 19

Sleepy foal disease

Question 20

The chronic form of Actinobacillus equuli subsp. equuli is characterized by __________

Answer 20

1. Purulent arthritis (joint ill)
2. Suppurative multifocal nephritis

Question 21

What actinobacillus equuli spp infects only horses?

Answer 21

Actinobacillus equuli subsp. haemolyticus

Question 22

__________ actinobacillus spp causes wooden (timber) tongue

Answer 22

A. lignieresi

Question 23

Disease development of actinobacillus lignieresi occurs after ___________

Answer 23

Inoculation into mucous membranes during abrasion by rough feed

Question 24

Pyogranulomatous lesions formed by actinobacillus lignieresi resemble those of ___________

Answer 24

Actinomyces bovis

Question 25

Which is not true of actinobacillus lignieresi?
A. Bone is usually unaffected
B. Facultative aerobe
C. Spreads via lymphatics
D. Abscesses can be seen on the jaw, head, neck, and limbs

Answer 25

B. Facultative aerobe

FALSE: Facultative anaerobe

Question 26

What can be seen on growth of actinobacillus spp on sheep blood agar?

Answer 26

Satellitism (NAD dependence = staphylococcus required for growth) and CAMP effect (Co-hemolysin)

Question 27

What vaccines are available for actinobacillus?

Answer 27

1. Bacterins
2. Apx toxins
3. Apx + Transferrin binding proteins
4. Apx + TBP + Type IV fimbriae

Question 28

Which of the following is osteomyelitis not seen as a CS?
A. Actinobacillus suis
B. Actinobacillus equuli
C. Sleepy foal disease
D. Actinobacillus lignieresi

Answer 28

D. Actinobacillus lignieresi