Lesson 5a, 5b

Question 1

Erysipelothrix rhusiopathiae generally cause these diseases

Answer 1

1. swine erysipelas
2. turkey erysipelas
3. polyarthritis

Question 2

Infection of E. rhusiopathiae via

Answer 2

ingestion of material contaminated by pig faeces

Question 3

E. rhusiopathiae localize in these areas

Answer 3

joint synovia, heart valves

Question 4

clinical signs include pigs are febrile, depressed, walk with a stiff, stilted gait or remain recumbent

Answer 4

septicaemic form

Question 5

diamond skin; cutaneous lesions progress to characteristic diamond-shaped erythematous plaques

Answer 5

cutaneous form

Question 6

acute forms of swine erysipelas

Answer 6

Septicemia form, Cutaneous form

Question 7

common in older pigs, and present as stiffness,
lameness or reluctance to bear weight on affected limbs

Answer 7

arthritic form of erysipelas

Question 8

least common form, with wart-like
thrombotic masses usually on the mitral valves

Answer 8

vegetative endocarditis

Question 9

Joint lesions mild but can progress to erosion of articular cartilage with eventual
fibrosis and ankylosis.

Answer 9

arthritic form of swine erysipelas

Question 10

Diamond-shaped skin lesions are

Answer 10

pathognomonic

Question 11

treatment for acute form of swine erysipelas

Answer 11

penicillin or tetracyclin

Question 12

important disease in turkeys worldwide

Answer 12

erysipelas in fowl

Question 13

Dark-colored, swollen snoods are characteristic of the disease. Post-mortem findings include enlarged friable livers and spleens

Answer 13

erysipelas in fowl

Question 14

cause outbreaks of severe disease occasionally, with reported mortality rates of up to 50%

Answer 14

erysipelas in chickens

Question 15

non-supporative polyarthritis in lambs, entry of
infection may be thru the navel or thru docking or castration wounds

Answer 15

infection in sheeps

Question 16

implicated in sporadic abortions in cattle and sheep

Answer 16

Bacillus licheniformis

Question 17

5 mm diameter, flat, dry, greyish
and with a ‘ground glass’ appearance

Answer 17

Bacillus anthracis

Question 18

same with B. anthracis but are larger
and with greenish tinge

Answer 18

bacillus cereus

Question 19

colonies are dull, rough, wrinkled and strongly adherent to the agar that becomes
brown with age

Answer 19

Bacillus licheniformis

Question 20

curled outgrowths from the edge of the colony impart a characteristic, ‘medusa head’ appearance

Answer 20

Bacillus anthracis

Question 21

Clinical manifestation of cattle and sheep by B. anthracis

Answer 21

Fatal peracute or acute septicaemic
anthrax

Question 22

Clinical manifestation of pigs by B. anthracis

Answer 22

Subacute anthrax with edematous
swelling in pharyngeal region; an intestinal
form with higher mortality is less common

Question 23

Clinical manifestation of horses by B. anthracis

Answer 23

Subacute anthrax with localized edema;
septicemia with colic and enteritis
sometimes occurs

Question 24

clinical manifestation of b. cereus in cattle

Answer 24

mastitis

Question 25

clinical manifestations of b. licheniformis to cattle and sheep

Answer 25

sporadic abortion

Question 26

cause of abortion in cattle and sheep
associated with the feeding of contaminated silage or mouldy hay and diagnosed
by isolation in heavy, pure culture from fetal abomasal contents

Answer 26

B. licheniformis

Question 27

anthrax are moderately susceptible to?

Answer 27

pigs and horses

Question 28

resistant to anthrax

Answer 28

carnivores, birds

Question 29

encodes for exotoxin (protective antigen, edema factor and lethal factor)

Answer 29

Plasmid PXO1

Question 30

encodes for capsule of Bacillus sp.

Answer 30

PXO2

Question 31

clinical signs of anthrax in cattle and sheep

Answer 31

septicemic, pyrexia 42°C (108°F), depression, congested mucosae and petechiae may be observed ante mortem, abortion or
subcutaneous edema and dysentery

Question 32

anthrax clinical signs in pigs

Answer 32

edematous swelling of the
throat and head along with regional lymphadenitis

Question 33

treatment and control of anthrax

Answer 33

PenG or oxytet