26. Swine fever (hog cholera) and its complications; African swine fever

Question 1

viral cause of swine fever

Answer 1

flaviviridae - pestivirus

Question 2

infection of swine fever

Answer 2

oronasal infection

Question 3

viraemia of swine fever on blood vessels

Answer 3

hyaline degeneration, fibrinoid necrosis

Question 4

viraemia of swine fever on lymphoreticular tissue

Answer 4

necrosis

Question 5

viraemia of swine fever on bone marrow

Answer 5

necrosis
coagulopathy

Question 6

viraemia of swine fever on lungs

Answer 6

haemorrhagic fibrinous pneumonia

Question 7

viraemia of swine fever on cns

Answer 7

non suppurative polio & leukoencephalitis

Question 8

2 typical forms of swine fever

Answer 8

without secondary infection
with secondary infection

Question 9

types of swine fever without secondary infection

Answer 9

peracute
acute
subacute
chronic

Question 10

cause of secondary infection

Answer 10

salmonella choleaersuis septicaemia & enterocolitis
arysipelas
pasteurella
actinobacillus
pleuropneumonia
sl. septicum

Question 11

atypical form of swine fever

Answer 11

reproductive disorder
only affect foetus

Question 12

symptoms of atypical swine fever

Answer 12

still birth
embryo and foetal loss
congenital tremor type 1
mummification
developmental anomalies

Question 13

clinical signs of swine fever

Answer 13

haemorrhage of: skin, small intestine, stomach, rectum, urinary bladder, kidney, renal pelvis, epiglottis, meningis, pulmonary, splenic infarct
haemorrhagic infilitration of: ln, large intestine
button ulcers

Question 14

differential of swine fever

Answer 14

african swine fever
any septicaemic disease
porcine dermatitis nephropathy syndrome
porcine circovirus II infection

Question 15

virus of african swine fever

Answer 15

asfivirus

Question 16

where is replication of african swine fever

Answer 16

replication in macrophages, endothelial cells, renal tubular ep cells, neutrophils
no neutralising antibodies formed

Question 17

hosts

Answer 17

african suidae
wild boar/domestic swine
ornithodoros (mite) moubara and erraticus

Question 18

transmission of wildboar/ domestic swine

Answer 18

direct transmission

Question 19

transmission of african suidae

Answer 19

tick transmission

Question 20

blood remains infectious for

Answer 20

18months

Question 21

chilled meat remains infectious for

Answer 21

110days

Question 22

serrano ham remains infectious for

Answer 22

140days

Question 23

frozen meat remains infectious for

Answer 23

1000days

Question 24

incubation of african swine fever

Answer 24

4-19days
high fever
anorexia
skin haemorrage
bloody diarrhoea
abortion
death

Question 25

clinical signs of african swine fever on limbs and skin

Answer 25

hyperaemia

Question 26

clinical signs of african swine fever on kidney

Answer 26

disseminated petechiae retroperitoneal oedeam foci & necrotic exsudate

Question 27

clinical signs of african swine fever on caecum

Answer 27

oedematious mucosa

Question 28

clinical signs of african swine fever on ln

Answer 28

haemorrhage

Question 29

clinical signs of african swine fever on colon

Answer 29

distended, bloody

Question 30

clinical signs of african swine fever on stomach

Answer 30

full of coagulated blood oedematous wall

Question 31

clinical signs of african swine fever on stomach serosa

Answer 31

paintbrush haemorrhage

Question 32

clinical signs of african swine fever on lung

Answer 32

non collapsed, oedematous dorsal haemorrhage ventral consolidation

Question 33

clinical signs of african swine fever on heart

Answer 33

subendothelial haemorrhage straw coloured pericardial fluid multifocal epicardial haemorrhage